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JUCE/src/gui/components/juce_Component.cpp

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/*
==============================================================================
This file is part of the JUCE library - "Jules' Utility Class Extensions"
Copyright 2004-10 by Raw Material Software Ltd.
------------------------------------------------------------------------------
JUCE can be redistributed and/or modified under the terms of the GNU General
Public License (Version 2), as published by the Free Software Foundation.
A copy of the license is included in the JUCE distribution, or can be found
online at www.gnu.org/licenses.
JUCE is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
A PARTICULAR PURPOSE. See the GNU General Public License for more details.
------------------------------------------------------------------------------
To release a closed-source product which uses JUCE, commercial licenses are
available: visit www.rawmaterialsoftware.com/juce for more information.
==============================================================================
*/
#include "../../core/juce_StandardHeader.h"
BEGIN_JUCE_NAMESPACE
#include "juce_Component.h"
#include "juce_Desktop.h"
#include "windows/juce_ComponentPeer.h"
#include "keyboard/juce_KeyListener.h"
#include "lookandfeel/juce_LookAndFeel.h"
#include "../../application/juce_Application.h"
#include "../graphics/geometry/juce_RectangleList.h"
#include "../graphics/imaging/juce_Image.h"
#include "../graphics/contexts/juce_LowLevelGraphicsContext.h"
#include "../../events/juce_MessageManager.h"
#include "../../events/juce_Timer.h"
#include "../../core/juce_Time.h"
#include "../../core/juce_PlatformUtilities.h"
#include "mouse/juce_MouseInputSource.h"
//==============================================================================
#define CHECK_MESSAGE_MANAGER_IS_LOCKED jassert (MessageManager::getInstance()->currentThreadHasLockedMessageManager());
Component* Component::currentlyFocusedComponent = 0;
//==============================================================================
class Component::MouseListenerList
{
public:
MouseListenerList()
: numDeepMouseListeners (0)
{
}
~MouseListenerList()
{
}
void addListener (MouseListener* const newListener, const bool wantsEventsForAllNestedChildComponents)
{
if (! listeners.contains (newListener))
{
if (wantsEventsForAllNestedChildComponents)
{
listeners.insert (0, newListener);
++numDeepMouseListeners;
}
else
{
listeners.add (newListener);
}
}
}
void removeListener (MouseListener* const listenerToRemove)
{
const int index = listeners.indexOf (listenerToRemove);
if (index >= 0)
{
if (index < numDeepMouseListeners)
--numDeepMouseListeners;
listeners.remove (index);
}
}
static void sendMouseEvent (Component* comp, BailOutChecker& checker,
void (MouseListener::*eventMethod) (const MouseEvent&), const MouseEvent& e)
{
if (checker.shouldBailOut())
return;
{
MouseListenerList* const list = comp->mouseListeners_;
if (list != 0)
{
for (int i = list->listeners.size(); --i >= 0;)
{
(list->listeners.getUnchecked(i)->*eventMethod) (e);
if (checker.shouldBailOut())
return;
i = jmin (i, list->listeners.size());
}
}
}
Component* p = comp->parentComponent_;
while (p != 0)
{
MouseListenerList* const list = p->mouseListeners_;
if (list != 0 && list->numDeepMouseListeners > 0)
{
BailOutChecker checker2 (comp, p);
for (int i = list->numDeepMouseListeners; --i >= 0;)
{
(list->listeners.getUnchecked(i)->*eventMethod) (e);
if (checker2.shouldBailOut())
return;
i = jmin (i, list->numDeepMouseListeners);
}
}
p = p->parentComponent_;
}
}
static void sendWheelEvent (Component* comp, BailOutChecker& checker, const MouseEvent& e,
const float wheelIncrementX, const float wheelIncrementY)
{
if (checker.shouldBailOut())
return;
{
MouseListenerList* const list = comp->mouseListeners_;
if (list != 0)
{
for (int i = list->listeners.size(); --i >= 0;)
{
list->listeners.getUnchecked(i)->mouseWheelMove (e, wheelIncrementX, wheelIncrementY);
if (checker.shouldBailOut())
return;
i = jmin (i, list->listeners.size());
}
}
}
Component* p = comp->parentComponent_;
while (p != 0)
{
MouseListenerList* const list = p->mouseListeners_;
if (list != 0 && list->numDeepMouseListeners > 0)
{
BailOutChecker checker2 (comp, p);
for (int i = list->numDeepMouseListeners; --i >= 0;)
{
list->listeners.getUnchecked(i)->mouseWheelMove (e, wheelIncrementX, wheelIncrementY);
if (checker2.shouldBailOut())
return;
i = jmin (i, list->numDeepMouseListeners);
}
}
p = p->parentComponent_;
}
}
private:
Array <MouseListener*> listeners;
int numDeepMouseListeners;
JUCE_DECLARE_NON_COPYABLE (MouseListenerList);
};
//==============================================================================
class Component::ComponentHelpers
{
public:
//==============================================================================
static void* runModalLoopCallback (void* userData)
{
return (void*) (pointer_sized_int) static_cast <Component*> (userData)->runModalLoop();
}
static const Identifier getColourPropertyId (const int colourId)
{
String s;
s.preallocateStorage (18);
s << "jcclr_" << String::toHexString (colourId);
return s;
}
//==============================================================================
static inline bool hitTest (Component& comp, const Point<int>& localPoint)
{
return isPositiveAndBelow (localPoint.getX(), comp.getWidth())
&& isPositiveAndBelow (localPoint.getY(), comp.getHeight())
&& comp.hitTest (localPoint.getX(), localPoint.getY());
}
static const Point<int> convertFromParentSpace (const Component& comp, const Point<int>& pointInParentSpace)
{
if (comp.affineTransform_ == 0)
return pointInParentSpace - comp.getPosition();
return pointInParentSpace.toFloat().transformedBy (comp.affineTransform_->inverted()).toInt() - comp.getPosition();
}
static const Rectangle<int> convertFromParentSpace (const Component& comp, const Rectangle<int>& areaInParentSpace)
{
if (comp.affineTransform_ == 0)
return areaInParentSpace - comp.getPosition();
return areaInParentSpace.toFloat().transformed (comp.affineTransform_->inverted()).getSmallestIntegerContainer() - comp.getPosition();
}
static const Point<int> convertToParentSpace (const Component& comp, const Point<int>& pointInLocalSpace)
{
if (comp.affineTransform_ == 0)
return pointInLocalSpace + comp.getPosition();
return (pointInLocalSpace + comp.getPosition()).toFloat().transformedBy (*comp.affineTransform_).toInt();
}
static const Rectangle<int> convertToParentSpace (const Component& comp, const Rectangle<int>& areaInLocalSpace)
{
if (comp.affineTransform_ == 0)
return areaInLocalSpace + comp.getPosition();
return (areaInLocalSpace + comp.getPosition()).toFloat().transformed (*comp.affineTransform_).getSmallestIntegerContainer();
}
template <typename Type>
static const Type convertFromDistantParentSpace (const Component* parent, const Component& target, Type coordInParent)
{
const Component* const directParent = target.getParentComponent();
jassert (directParent != 0);
if (directParent == parent)
return convertFromParentSpace (target, coordInParent);
return convertFromParentSpace (target, convertFromDistantParentSpace (parent, *directParent, coordInParent));
}
template <typename Type>
static const Type convertCoordinate (const Component* target, const Component* source, Type p)
{
while (source != 0)
{
if (source == target)
return p;
if (source->isParentOf (target))
return convertFromDistantParentSpace (source, *target, p);
if (source->isOnDesktop())
{
p = source->getPeer()->localToGlobal (p);
source = 0;
}
else
{
p = convertToParentSpace (*source, p);
source = source->getParentComponent();
}
}
jassert (source == 0);
if (target == 0)
return p;
const Component* const topLevelComp = target->getTopLevelComponent();
if (topLevelComp->isOnDesktop())
p = topLevelComp->getPeer()->globalToLocal (p);
else
p = convertFromParentSpace (*topLevelComp, p);
if (topLevelComp == target)
return p;
return convertFromDistantParentSpace (topLevelComp, *target, p);
}
static const Rectangle<int> getUnclippedArea (const Component& comp)
{
Rectangle<int> r (comp.getLocalBounds());
Component* const p = comp.getParentComponent();
if (p != 0)
r = r.getIntersection (convertFromParentSpace (comp, getUnclippedArea (*p)));
return r;
}
static void clipObscuredRegions (const Component& comp, Graphics& g, const Rectangle<int>& clipRect, const Point<int>& delta)
{
for (int i = comp.childComponentList_.size(); --i >= 0;)
{
const Component& child = *comp.childComponentList_.getUnchecked(i);
if (child.isVisible() && ! child.isTransformed())
{
const Rectangle<int> newClip (clipRect.getIntersection (child.bounds_));
if (! newClip.isEmpty())
{
if (child.isOpaque())
{
g.excludeClipRegion (newClip + delta);
}
else
{
const Point<int> childPos (child.getPosition());
clipObscuredRegions (child, g, newClip - childPos, childPos + delta);
}
}
}
}
}
static void subtractObscuredRegions (const Component& comp, RectangleList& result,
const Point<int>& delta,
const Rectangle<int>& clipRect,
const Component* const compToAvoid)
{
for (int i = comp.childComponentList_.size(); --i >= 0;)
{
const Component* const c = comp.childComponentList_.getUnchecked(i);
if (c != compToAvoid && c->isVisible())
{
if (c->isOpaque())
{
Rectangle<int> childBounds (c->bounds_.getIntersection (clipRect));
childBounds.translate (delta.getX(), delta.getY());
result.subtract (childBounds);
}
else
{
Rectangle<int> newClip (clipRect.getIntersection (c->bounds_));
newClip.translate (-c->getX(), -c->getY());
subtractObscuredRegions (*c, result, c->getPosition() + delta,
newClip, compToAvoid);
}
}
}
}
static const Rectangle<int> getParentOrMainMonitorBounds (const Component& comp)
{
return comp.getParentComponent() != 0 ? comp.getParentComponent()->getLocalBounds()
: Desktop::getInstance().getMainMonitorArea();
}
};
//==============================================================================
Component::Component()
: parentComponent_ (0),
lookAndFeel_ (0),
effect_ (0),
bufferedImage_ (0),
componentFlags_ (0),
componentTransparency (0)
{
}
Component::Component (const String& name)
: componentName_ (name),
parentComponent_ (0),
lookAndFeel_ (0),
effect_ (0),
bufferedImage_ (0),
componentFlags_ (0),
componentTransparency (0)
{
}
Component::~Component()
{
#if ! JUCE_VC6 // (access to private union not allowed in VC6)
static_jassert (sizeof (flags) <= sizeof (componentFlags_));
#endif
componentListeners.call (&ComponentListener::componentBeingDeleted, *this);
weakReferenceMaster.clear();
while (childComponentList_.size() > 0)
removeChildComponent (childComponentList_.size() - 1, false, true);
if (parentComponent_ != 0)
parentComponent_->removeChildComponent (parentComponent_->childComponentList_.indexOf (this), true, false);
else if (currentlyFocusedComponent == this || isParentOf (currentlyFocusedComponent))
giveAwayFocus (currentlyFocusedComponent != this);
if (flags.hasHeavyweightPeerFlag)
removeFromDesktop();
// Something has added some children to this component during its destructor! Not a smart idea!
jassert (childComponentList_.size() == 0);
}
const WeakReference<Component>::SharedRef& Component::getWeakReference()
{
return weakReferenceMaster (this);
}
//==============================================================================
void Component::setName (const String& name)
{
// if component methods are being called from threads other than the message
// thread, you'll need to use a MessageManagerLock object to make sure it's thread-safe.
CHECK_MESSAGE_MANAGER_IS_LOCKED
if (componentName_ != name)
{
componentName_ = name;
if (flags.hasHeavyweightPeerFlag)
{
ComponentPeer* const peer = getPeer();
jassert (peer != 0);
if (peer != 0)
peer->setTitle (name);
}
BailOutChecker checker (this);
componentListeners.callChecked (checker, &ComponentListener::componentNameChanged, *this);
}
}
void Component::setVisible (bool shouldBeVisible)
{
if (flags.visibleFlag != shouldBeVisible)
{
// if component methods are being called from threads other than the message
// thread, you'll need to use a MessageManagerLock object to make sure it's thread-safe.
CHECK_MESSAGE_MANAGER_IS_LOCKED
WeakReference<Component> safePointer (this);
flags.visibleFlag = shouldBeVisible;
internalRepaint (0, 0, getWidth(), getHeight());
sendFakeMouseMove();
if (! shouldBeVisible)
{
if (currentlyFocusedComponent == this || isParentOf (currentlyFocusedComponent))
{
if (parentComponent_ != 0)
parentComponent_->grabKeyboardFocus();
else
giveAwayFocus (true);
}
}
if (safePointer != 0)
{
sendVisibilityChangeMessage();
if (safePointer != 0 && flags.hasHeavyweightPeerFlag)
{
ComponentPeer* const peer = getPeer();
jassert (peer != 0);
if (peer != 0)
{
peer->setVisible (shouldBeVisible);
internalHierarchyChanged();
}
}
}
}
}
void Component::visibilityChanged()
{
}
void Component::sendVisibilityChangeMessage()
{
BailOutChecker checker (this);
visibilityChanged();
if (! checker.shouldBailOut())
componentListeners.callChecked (checker, &ComponentListener::componentVisibilityChanged, *this);
}
bool Component::isShowing() const
{
if (flags.visibleFlag)
{
if (parentComponent_ != 0)
{
return parentComponent_->isShowing();
}
else
{
const ComponentPeer* const peer = getPeer();
return peer != 0 && ! peer->isMinimised();
}
}
return false;
}
//==============================================================================
void* Component::getWindowHandle() const
{
const ComponentPeer* const peer = getPeer();
if (peer != 0)
return peer->getNativeHandle();
return 0;
}
//==============================================================================
void Component::addToDesktop (int styleWanted, void* nativeWindowToAttachTo)
{
// if component methods are being called from threads other than the message
// thread, you'll need to use a MessageManagerLock object to make sure it's thread-safe.
CHECK_MESSAGE_MANAGER_IS_LOCKED
if (isOpaque())
styleWanted &= ~ComponentPeer::windowIsSemiTransparent;
else
styleWanted |= ComponentPeer::windowIsSemiTransparent;
int currentStyleFlags = 0;
// don't use getPeer(), so that we only get the peer that's specifically
// for this comp, and not for one of its parents.
ComponentPeer* peer = ComponentPeer::getPeerFor (this);
if (peer != 0)
currentStyleFlags = peer->getStyleFlags();
if (styleWanted != currentStyleFlags || ! flags.hasHeavyweightPeerFlag)
{
WeakReference<Component> safePointer (this);
#if JUCE_LINUX
// it's wise to give the component a non-zero size before
// putting it on the desktop, as X windows get confused by this, and
// a (1, 1) minimum size is enforced here.
setSize (jmax (1, getWidth()),
jmax (1, getHeight()));
#endif
const Point<int> topLeft (getScreenPosition());
bool wasFullscreen = false;
bool wasMinimised = false;
ComponentBoundsConstrainer* currentConstainer = 0;
Rectangle<int> oldNonFullScreenBounds;
if (peer != 0)
{
wasFullscreen = peer->isFullScreen();
wasMinimised = peer->isMinimised();
currentConstainer = peer->getConstrainer();
oldNonFullScreenBounds = peer->getNonFullScreenBounds();
removeFromDesktop();
setTopLeftPosition (topLeft.getX(), topLeft.getY());
}
if (parentComponent_ != 0)
parentComponent_->removeChildComponent (this);
if (safePointer != 0)
{
flags.hasHeavyweightPeerFlag = true;
peer = createNewPeer (styleWanted, nativeWindowToAttachTo);
Desktop::getInstance().addDesktopComponent (this);
bounds_.setPosition (topLeft);
peer->setBounds (topLeft.getX(), topLeft.getY(), getWidth(), getHeight(), false);
peer->setVisible (isVisible());
if (wasFullscreen)
{
peer->setFullScreen (true);
peer->setNonFullScreenBounds (oldNonFullScreenBounds);
}
if (wasMinimised)
peer->setMinimised (true);
if (isAlwaysOnTop())
peer->setAlwaysOnTop (true);
peer->setConstrainer (currentConstainer);
repaint();
}
internalHierarchyChanged();
}
}
void Component::removeFromDesktop()
{
// if component methods are being called from threads other than the message
// thread, you'll need to use a MessageManagerLock object to make sure it's thread-safe.
CHECK_MESSAGE_MANAGER_IS_LOCKED
if (flags.hasHeavyweightPeerFlag)
{
ComponentPeer* const peer = ComponentPeer::getPeerFor (this);
flags.hasHeavyweightPeerFlag = false;
jassert (peer != 0);
delete peer;
Desktop::getInstance().removeDesktopComponent (this);
}
}
bool Component::isOnDesktop() const throw()
{
return flags.hasHeavyweightPeerFlag;
}
void Component::userTriedToCloseWindow()
{
/* This means that the user's trying to get rid of your window with the 'close window' system
menu option (on windows) or possibly the task manager - you should really handle this
and delete or hide your component in an appropriate way.
If you want to ignore the event and don't want to trigger this assertion, just override
this method and do nothing.
*/
jassertfalse;
}
void Component::minimisationStateChanged (bool)
{
}
//==============================================================================
void Component::setOpaque (const bool shouldBeOpaque)
{
if (shouldBeOpaque != flags.opaqueFlag)
{
flags.opaqueFlag = shouldBeOpaque;
if (flags.hasHeavyweightPeerFlag)
{
const ComponentPeer* const peer = ComponentPeer::getPeerFor (this);
if (peer != 0)
{
// to make it recreate the heavyweight window
addToDesktop (peer->getStyleFlags());
}
}
repaint();
}
}
bool Component::isOpaque() const throw()
{
return flags.opaqueFlag;
}
//==============================================================================
void Component::setBufferedToImage (const bool shouldBeBuffered)
{
if (shouldBeBuffered != flags.bufferToImageFlag)
{
bufferedImage_ = Image::null;
flags.bufferToImageFlag = shouldBeBuffered;
}
}
//==============================================================================
void Component::toFront (const bool setAsForeground)
{
// if component methods are being called from threads other than the message
// thread, you'll need to use a MessageManagerLock object to make sure it's thread-safe.
CHECK_MESSAGE_MANAGER_IS_LOCKED
if (flags.hasHeavyweightPeerFlag)
{
ComponentPeer* const peer = getPeer();
if (peer != 0)
{
peer->toFront (setAsForeground);
if (setAsForeground && ! hasKeyboardFocus (true))
grabKeyboardFocus();
}
}
else if (parentComponent_ != 0)
{
Array<Component*>& childList = parentComponent_->childComponentList_;
if (childList.getLast() != this)
{
const int index = childList.indexOf (this);
if (index >= 0)
{
int insertIndex = -1;
if (! flags.alwaysOnTopFlag)
{
insertIndex = childList.size() - 1;
while (insertIndex > 0 && childList.getUnchecked (insertIndex)->isAlwaysOnTop())
--insertIndex;
}
if (index != insertIndex)
{
childList.move (index, insertIndex);
sendFakeMouseMove();
repaintParent();
}
}
}
if (setAsForeground)
{
internalBroughtToFront();
grabKeyboardFocus();
}
}
}
void Component::toBehind (Component* const other)
{
if (other != 0 && other != this)
{
// the two components must belong to the same parent..
jassert (parentComponent_ == other->parentComponent_);
if (parentComponent_ != 0)
{
Array<Component*>& childList = parentComponent_->childComponentList_;
const int index = childList.indexOf (this);
if (index >= 0 && childList [index + 1] != other)
{
int otherIndex = childList.indexOf (other);
if (otherIndex >= 0)
{
if (index < otherIndex)
--otherIndex;
childList.move (index, otherIndex);
sendFakeMouseMove();
repaintParent();
}
}
}
else if (isOnDesktop())
{
jassert (other->isOnDesktop());
if (other->isOnDesktop())
{
ComponentPeer* const us = getPeer();
ComponentPeer* const them = other->getPeer();
jassert (us != 0 && them != 0);
if (us != 0 && them != 0)
us->toBehind (them);
}
}
}
}
void Component::toBack()
{
Array<Component*>& childList = parentComponent_->childComponentList_;
if (isOnDesktop())
{
jassertfalse; //xxx need to add this to native window
}
else if (parentComponent_ != 0 && childList.getFirst() != this)
{
const int index = childList.indexOf (this);
if (index > 0)
{
int insertIndex = 0;
if (flags.alwaysOnTopFlag)
{
while (insertIndex < childList.size()
&& ! childList.getUnchecked (insertIndex)->isAlwaysOnTop())
{
++insertIndex;
}
}
if (index != insertIndex)
{
childList.move (index, insertIndex);
sendFakeMouseMove();
repaintParent();
}
}
}
}
void Component::setAlwaysOnTop (const bool shouldStayOnTop)
{
if (shouldStayOnTop != flags.alwaysOnTopFlag)
{
flags.alwaysOnTopFlag = shouldStayOnTop;
if (isOnDesktop())
{
ComponentPeer* const peer = getPeer();
jassert (peer != 0);
if (peer != 0)
{
if (! peer->setAlwaysOnTop (shouldStayOnTop))
{
// some kinds of peer can't change their always-on-top status, so
// for these, we'll need to create a new window
const int oldFlags = peer->getStyleFlags();
removeFromDesktop();
addToDesktop (oldFlags);
}
}
}
if (shouldStayOnTop)
toFront (false);
internalHierarchyChanged();
}
}
bool Component::isAlwaysOnTop() const throw()
{
return flags.alwaysOnTopFlag;
}
//==============================================================================
int Component::proportionOfWidth (const float proportion) const throw()
{
return roundToInt (proportion * bounds_.getWidth());
}
int Component::proportionOfHeight (const float proportion) const throw()
{
return roundToInt (proportion * bounds_.getHeight());
}
int Component::getParentWidth() const throw()
{
return (parentComponent_ != 0) ? parentComponent_->getWidth()
: getParentMonitorArea().getWidth();
}
int Component::getParentHeight() const throw()
{
return (parentComponent_ != 0) ? parentComponent_->getHeight()
: getParentMonitorArea().getHeight();
}
int Component::getScreenX() const { return getScreenPosition().getX(); }
int Component::getScreenY() const { return getScreenPosition().getY(); }
const Point<int> Component::getScreenPosition() const { return localPointToGlobal (Point<int>()); }
const Rectangle<int> Component::getScreenBounds() const { return localAreaToGlobal (getLocalBounds()); }
const Point<int> Component::getLocalPoint (const Component* source, const Point<int>& point) const
{
return ComponentHelpers::convertCoordinate (this, source, point);
}
const Rectangle<int> Component::getLocalArea (const Component* source, const Rectangle<int>& area) const
{
return ComponentHelpers::convertCoordinate (this, source, area);
}
const Point<int> Component::localPointToGlobal (const Point<int>& point) const
{
return ComponentHelpers::convertCoordinate (0, this, point);
}
const Rectangle<int> Component::localAreaToGlobal (const Rectangle<int>& area) const
{
return ComponentHelpers::convertCoordinate (0, this, area);
}
/* Deprecated methods... */
const Point<int> Component::relativePositionToGlobal (const Point<int>& relativePosition) const
{
return localPointToGlobal (relativePosition);
}
const Point<int> Component::globalPositionToRelative (const Point<int>& screenPosition) const
{
return getLocalPoint (0, screenPosition);
}
const Point<int> Component::relativePositionToOtherComponent (const Component* const targetComponent, const Point<int>& positionRelativeToThis) const
{
return targetComponent == 0 ? localPointToGlobal (positionRelativeToThis)
: targetComponent->getLocalPoint (this, positionRelativeToThis);
}
//==============================================================================
void Component::setBounds (const int x, const int y, int w, int h)
{
// if component methods are being called from threads other than the message
// thread, you'll need to use a MessageManagerLock object to make sure it's thread-safe.
CHECK_MESSAGE_MANAGER_IS_LOCKED
if (w < 0) w = 0;
if (h < 0) h = 0;
const bool wasResized = (getWidth() != w || getHeight() != h);
const bool wasMoved = (getX() != x || getY() != y);
#if JUCE_DEBUG
// It's a very bad idea to try to resize a window during its paint() method!
jassert (! (flags.isInsidePaintCall && wasResized && isOnDesktop()));
#endif
if (wasMoved || wasResized)
{
const bool showing = isShowing();
if (showing)
{
// send a fake mouse move to trigger enter/exit messages if needed..
sendFakeMouseMove();
if (! flags.hasHeavyweightPeerFlag)
repaintParent();
}
bounds_.setBounds (x, y, w, h);
if (showing)
{
if (wasResized)
repaint();
else if (! flags.hasHeavyweightPeerFlag)
repaintParent();
}
if (flags.hasHeavyweightPeerFlag)
{
ComponentPeer* const peer = getPeer();
if (peer != 0)
{
if (wasMoved && wasResized)
peer->setBounds (getX(), getY(), getWidth(), getHeight(), false);
else if (wasMoved)
peer->setPosition (getX(), getY());
else if (wasResized)
peer->setSize (getWidth(), getHeight());
}
}
sendMovedResizedMessages (wasMoved, wasResized);
}
}
void Component::sendMovedResizedMessages (const bool wasMoved, const bool wasResized)
{
BailOutChecker checker (this);
if (wasMoved)
{
moved();
if (checker.shouldBailOut())
return;
}
if (wasResized)
{
resized();
if (checker.shouldBailOut())
return;
for (int i = childComponentList_.size(); --i >= 0;)
{
childComponentList_.getUnchecked(i)->parentSizeChanged();
if (checker.shouldBailOut())
return;
i = jmin (i, childComponentList_.size());
}
}
if (parentComponent_ != 0)
parentComponent_->childBoundsChanged (this);
if (! checker.shouldBailOut())
componentListeners.callChecked (checker, &ComponentListener::componentMovedOrResized,
*this, wasMoved, wasResized);
}
void Component::setSize (const int w, const int h)
{
setBounds (getX(), getY(), w, h);
}
void Component::setTopLeftPosition (const int x, const int y)
{
setBounds (x, y, getWidth(), getHeight());
}
void Component::setTopRightPosition (const int x, const int y)
{
setTopLeftPosition (x - getWidth(), y);
}
void Component::setBounds (const Rectangle<int>& r)
{
setBounds (r.getX(),
r.getY(),
r.getWidth(),
r.getHeight());
}
void Component::setBoundsRelative (const float x, const float y,
const float w, const float h)
{
const int pw = getParentWidth();
const int ph = getParentHeight();
setBounds (roundToInt (x * pw),
roundToInt (y * ph),
roundToInt (w * pw),
roundToInt (h * ph));
}
void Component::setCentrePosition (const int x, const int y)
{
setTopLeftPosition (x - getWidth() / 2,
y - getHeight() / 2);
}
void Component::setCentreRelative (const float x, const float y)
{
setCentrePosition (roundToInt (getParentWidth() * x),
roundToInt (getParentHeight() * y));
}
void Component::centreWithSize (const int width, const int height)
{
const Rectangle<int> parentArea (ComponentHelpers::getParentOrMainMonitorBounds (*this));
setBounds (parentArea.getCentreX() - width / 2,
parentArea.getCentreY() - height / 2,
width, height);
}
void Component::setBoundsInset (const BorderSize& borders)
{
setBounds (borders.subtractedFrom (ComponentHelpers::getParentOrMainMonitorBounds (*this)));
}
void Component::setBoundsToFit (int x, int y, int width, int height,
const Justification& justification,
const bool onlyReduceInSize)
{
// it's no good calling this method unless both the component and
// target rectangle have a finite size.
jassert (getWidth() > 0 && getHeight() > 0 && width > 0 && height > 0);
if (getWidth() > 0 && getHeight() > 0
&& width > 0 && height > 0)
{
int newW, newH;
if (onlyReduceInSize && getWidth() <= width && getHeight() <= height)
{
newW = getWidth();
newH = getHeight();
}
else
{
const double imageRatio = getHeight() / (double) getWidth();
const double targetRatio = height / (double) width;
if (imageRatio <= targetRatio)
{
newW = width;
newH = jmin (height, roundToInt (newW * imageRatio));
}
else
{
newH = height;
newW = jmin (width, roundToInt (newH / imageRatio));
}
}
if (newW > 0 && newH > 0)
{
int newX, newY;
justification.applyToRectangle (newX, newY, newW, newH,
x, y, width, height);
setBounds (newX, newY, newW, newH);
}
}
}
//==============================================================================
bool Component::isTransformed() const throw()
{
return affineTransform_ != 0;
}
void Component::setTransform (const AffineTransform& newTransform)
{
// If you pass in a transform with no inverse, the component will have no dimensions,
// and there will be all sorts of maths errors when converting coordinates.
jassert (! newTransform.isSingularity());
if (newTransform.isIdentity())
{
if (affineTransform_ != 0)
{
repaint();
affineTransform_ = 0;
repaint();
sendMovedResizedMessages (false, false);
}
}
else if (affineTransform_ == 0)
{
repaint();
affineTransform_ = new AffineTransform (newTransform);
repaint();
sendMovedResizedMessages (false, false);
}
else if (*affineTransform_ != newTransform)
{
repaint();
*affineTransform_ = newTransform;
repaint();
sendMovedResizedMessages (false, false);
}
}
const AffineTransform Component::getTransform() const
{
return affineTransform_ != 0 ? *affineTransform_ : AffineTransform::identity;
}
//==============================================================================
bool Component::hitTest (int x, int y)
{
if (! flags.ignoresMouseClicksFlag)
return true;
if (flags.allowChildMouseClicksFlag)
{
for (int i = getNumChildComponents(); --i >= 0;)
{
Component& child = *getChildComponent (i);
if (child.isVisible()
&& ComponentHelpers::hitTest (child, ComponentHelpers::convertFromParentSpace (child, Point<int> (x, y))))
return true;
}
}
return false;
}
void Component::setInterceptsMouseClicks (const bool allowClicks,
const bool allowClicksOnChildComponents) throw()
{
flags.ignoresMouseClicksFlag = ! allowClicks;
flags.allowChildMouseClicksFlag = allowClicksOnChildComponents;
}
void Component::getInterceptsMouseClicks (bool& allowsClicksOnThisComponent,
bool& allowsClicksOnChildComponents) const throw()
{
allowsClicksOnThisComponent = ! flags.ignoresMouseClicksFlag;
allowsClicksOnChildComponents = flags.allowChildMouseClicksFlag;
}
bool Component::contains (const Point<int>& point)
{
if (ComponentHelpers::hitTest (*this, point))
{
if (parentComponent_ != 0)
{
return parentComponent_->contains (ComponentHelpers::convertToParentSpace (*this, point));
}
else if (flags.hasHeavyweightPeerFlag)
{
const ComponentPeer* const peer = getPeer();
if (peer != 0)
return peer->contains (point, true);
}
}
return false;
}
bool Component::reallyContains (const Point<int>& point, const bool returnTrueIfWithinAChild)
{
if (! contains (point))
return false;
Component* const top = getTopLevelComponent();
const Component* const compAtPosition = top->getComponentAt (top->getLocalPoint (this, point));
return (compAtPosition == this) || (returnTrueIfWithinAChild && isParentOf (compAtPosition));
}
Component* Component::getComponentAt (const Point<int>& position)
{
if (flags.visibleFlag && ComponentHelpers::hitTest (*this, position))
{
for (int i = childComponentList_.size(); --i >= 0;)
{
Component* child = childComponentList_.getUnchecked(i);
child = child->getComponentAt (ComponentHelpers::convertFromParentSpace (*child, position));
if (child != 0)
return child;
}
return this;
}
return 0;
}
Component* Component::getComponentAt (const int x, const int y)
{
return getComponentAt (Point<int> (x, y));
}
//==============================================================================
void Component::addChildComponent (Component* const child, int zOrder)
{
// if component methods are being called from threads other than the message
// thread, you'll need to use a MessageManagerLock object to make sure it's thread-safe.
CHECK_MESSAGE_MANAGER_IS_LOCKED
if (child != 0 && child->parentComponent_ != this)
{
if (child->parentComponent_ != 0)
child->parentComponent_->removeChildComponent (child);
else
child->removeFromDesktop();
child->parentComponent_ = this;
if (child->isVisible())
child->repaintParent();
if (! child->isAlwaysOnTop())
{
if (zOrder < 0 || zOrder > childComponentList_.size())
zOrder = childComponentList_.size();
while (zOrder > 0)
{
if (! childComponentList_.getUnchecked (zOrder - 1)->isAlwaysOnTop())
break;
--zOrder;
}
}
childComponentList_.insert (zOrder, child);
child->internalHierarchyChanged();
internalChildrenChanged();
}
}
void Component::addAndMakeVisible (Component* const child, int zOrder)
{
if (child != 0)
{
child->setVisible (true);
addChildComponent (child, zOrder);
}
}
void Component::removeChildComponent (Component* const child)
{
removeChildComponent (childComponentList_.indexOf (child), true, true);
}
Component* Component::removeChildComponent (const int index)
{
return removeChildComponent (index, true, true);
}
Component* Component::removeChildComponent (const int index, bool sendParentEvents, const bool sendChildEvents)
{
// if component methods are being called from threads other than the message
// thread, you'll need to use a MessageManagerLock object to make sure it's thread-safe.
CHECK_MESSAGE_MANAGER_IS_LOCKED
Component* const child = childComponentList_ [index];
if (child != 0)
{
sendParentEvents = sendParentEvents && child->isShowing();
if (sendParentEvents)
{
sendFakeMouseMove();
child->repaintParent();
}
childComponentList_.remove (index);
child->parentComponent_ = 0;
// (NB: there are obscure situations where child->isShowing() = false, but it still has the focus)
if (currentlyFocusedComponent == child || child->isParentOf (currentlyFocusedComponent))
{
if (sendParentEvents)
{
const WeakReference<Component> thisPointer (this);
giveAwayFocus (sendChildEvents || currentlyFocusedComponent != child);
if (thisPointer == 0)
return child;
grabKeyboardFocus();
}
else
{
giveAwayFocus (sendChildEvents || currentlyFocusedComponent != child);
}
}
if (sendChildEvents)
child->internalHierarchyChanged();
if (sendParentEvents)
internalChildrenChanged();
}
return child;
}
//==============================================================================
void Component::removeAllChildren()
{
while (childComponentList_.size() > 0)
removeChildComponent (childComponentList_.size() - 1);
}
void Component::deleteAllChildren()
{
while (childComponentList_.size() > 0)
delete (removeChildComponent (childComponentList_.size() - 1));
}
//==============================================================================
int Component::getNumChildComponents() const throw()
{
return childComponentList_.size();
}
Component* Component::getChildComponent (const int index) const throw()
{
return childComponentList_ [index];
}
int Component::getIndexOfChildComponent (const Component* const child) const throw()
{
return childComponentList_.indexOf (const_cast <Component*> (child));
}
Component* Component::getTopLevelComponent() const throw()
{
const Component* comp = this;
while (comp->parentComponent_ != 0)
comp = comp->parentComponent_;
return const_cast <Component*> (comp);
}
bool Component::isParentOf (const Component* possibleChild) const throw()
{
while (possibleChild != 0)
{
possibleChild = possibleChild->parentComponent_;
if (possibleChild == this)
return true;
}
return false;
}
//==============================================================================
void Component::parentHierarchyChanged()
{
}
void Component::childrenChanged()
{
}
void Component::internalChildrenChanged()
{
if (componentListeners.isEmpty())
{
childrenChanged();
}
else
{
BailOutChecker checker (this);
childrenChanged();
if (! checker.shouldBailOut())
componentListeners.callChecked (checker, &ComponentListener::componentChildrenChanged, *this);
}
}
void Component::internalHierarchyChanged()
{
BailOutChecker checker (this);
parentHierarchyChanged();
if (checker.shouldBailOut())
return;
componentListeners.callChecked (checker, &ComponentListener::componentParentHierarchyChanged, *this);
if (checker.shouldBailOut())
return;
for (int i = childComponentList_.size(); --i >= 0;)
{
childComponentList_.getUnchecked (i)->internalHierarchyChanged();
if (checker.shouldBailOut())
{
// you really shouldn't delete the parent component during a callback telling you
// that it's changed..
jassertfalse;
return;
}
i = jmin (i, childComponentList_.size());
}
}
//==============================================================================
int Component::runModalLoop()
{
if (! MessageManager::getInstance()->isThisTheMessageThread())
{
// use a callback so this can be called from non-gui threads
return (int) (pointer_sized_int) MessageManager::getInstance()
->callFunctionOnMessageThread (&ComponentHelpers::runModalLoopCallback, this);
}
if (! isCurrentlyModal())
enterModalState (true);
return ModalComponentManager::getInstance()->runEventLoopForCurrentComponent();
}
void Component::enterModalState (const bool takeKeyboardFocus_, ModalComponentManager::Callback* const callback)
{
// if component methods are being called from threads other than the message
// thread, you'll need to use a MessageManagerLock object to make sure it's thread-safe.
CHECK_MESSAGE_MANAGER_IS_LOCKED
// Check for an attempt to make a component modal when it already is!
// This can cause nasty problems..
jassert (! flags.currentlyModalFlag);
if (! isCurrentlyModal())
{
ModalComponentManager::getInstance()->startModal (this, callback);
flags.currentlyModalFlag = true;
setVisible (true);
if (takeKeyboardFocus_)
grabKeyboardFocus();
}
}
void Component::exitModalState (const int returnValue)
{
if (isCurrentlyModal())
{
if (MessageManager::getInstance()->isThisTheMessageThread())
{
ModalComponentManager::getInstance()->endModal (this, returnValue);
flags.currentlyModalFlag = false;
ModalComponentManager::getInstance()->bringModalComponentsToFront();
}
else
{
class ExitModalStateMessage : public CallbackMessage
{
public:
ExitModalStateMessage (Component* const target_, const int result_)
: target (target_), result (result_) {}
void messageCallback()
{
if (target.get() != 0) // (get() required for VS2003 bug)
target->exitModalState (result);
}
private:
WeakReference<Component> target;
int result;
};
(new ExitModalStateMessage (this, returnValue))->post();
}
}
}
bool Component::isCurrentlyModal() const throw()
{
return flags.currentlyModalFlag
&& getCurrentlyModalComponent() == this;
}
bool Component::isCurrentlyBlockedByAnotherModalComponent() const
{
Component* const mc = getCurrentlyModalComponent();
return mc != 0
&& mc != this
&& (! mc->isParentOf (this))
&& ! mc->canModalEventBeSentToComponent (this);
}
int JUCE_CALLTYPE Component::getNumCurrentlyModalComponents() throw()
{
return ModalComponentManager::getInstance()->getNumModalComponents();
}
Component* JUCE_CALLTYPE Component::getCurrentlyModalComponent (int index) throw()
{
return ModalComponentManager::getInstance()->getModalComponent (index);
}
//==============================================================================
void Component::setBroughtToFrontOnMouseClick (const bool shouldBeBroughtToFront) throw()
{
flags.bringToFrontOnClickFlag = shouldBeBroughtToFront;
}
bool Component::isBroughtToFrontOnMouseClick() const throw()
{
return flags.bringToFrontOnClickFlag;
}
//==============================================================================
void Component::setMouseCursor (const MouseCursor& cursor)
{
if (cursor_ != cursor)
{
cursor_ = cursor;
if (flags.visibleFlag)
updateMouseCursor();
}
}
const MouseCursor Component::getMouseCursor()
{
return cursor_;
}
void Component::updateMouseCursor() const
{
sendFakeMouseMove();
}
//==============================================================================
void Component::setRepaintsOnMouseActivity (const bool shouldRepaint) throw()
{
flags.repaintOnMouseActivityFlag = shouldRepaint;
}
//==============================================================================
void Component::setAlpha (const float newAlpha)
{
const uint8 newIntAlpha = (uint8) (255 - jlimit (0, 255, roundToInt (newAlpha * 255.0)));
if (componentTransparency != newIntAlpha)
{
componentTransparency = newIntAlpha;
if (flags.hasHeavyweightPeerFlag)
{
ComponentPeer* const peer = getPeer();
if (peer != 0)
peer->setAlpha (newAlpha);
}
else
{
repaint();
}
}
}
float Component::getAlpha() const
{
return (255 - componentTransparency) / 255.0f;
}
void Component::repaintParent()
{
if (flags.visibleFlag)
internalRepaint (0, 0, getWidth(), getHeight());
}
void Component::repaint()
{
repaint (0, 0, getWidth(), getHeight());
}
void Component::repaint (const int x, const int y,
const int w, const int h)
{
bufferedImage_ = Image::null;
if (flags.visibleFlag)
internalRepaint (x, y, w, h);
}
void Component::repaint (const Rectangle<int>& area)
{
repaint (area.getX(), area.getY(), area.getWidth(), area.getHeight());
}
void Component::internalRepaint (int x, int y, int w, int h)
{
// if component methods are being called from threads other than the message
// thread, you'll need to use a MessageManagerLock object to make sure it's thread-safe.
CHECK_MESSAGE_MANAGER_IS_LOCKED
if (x < 0)
{
w += x;
x = 0;
}
if (x + w > getWidth())
w = getWidth() - x;
if (w > 0)
{
if (y < 0)
{
h += y;
y = 0;
}
if (y + h > getHeight())
h = getHeight() - y;
if (h > 0)
{
if (parentComponent_ != 0)
{
if (parentComponent_->flags.visibleFlag)
{
if (affineTransform_ == 0)
{
parentComponent_->internalRepaint (x + getX(), y + getY(), w, h);
}
else
{
const Rectangle<int> r (ComponentHelpers::convertToParentSpace (*this, Rectangle<int> (x, y, w, h)));
parentComponent_->internalRepaint (r.getX(), r.getY(), r.getWidth(), r.getHeight());
}
}
}
else if (flags.hasHeavyweightPeerFlag)
{
ComponentPeer* const peer = getPeer();
if (peer != 0)
peer->repaint (Rectangle<int> (x, y, w, h));
}
}
}
}
//==============================================================================
void Component::paintComponent (Graphics& g)
{
if (flags.bufferToImageFlag)
{
if (bufferedImage_.isNull())
{
bufferedImage_ = Image (flags.opaqueFlag ? Image::RGB : Image::ARGB,
getWidth(), getHeight(), ! flags.opaqueFlag, Image::NativeImage);
Graphics imG (bufferedImage_);
paint (imG);
}
g.setColour (Colours::black.withAlpha (getAlpha()));
g.drawImageAt (bufferedImage_, 0, 0);
}
else
{
paint (g);
}
}
void Component::paintWithinParentContext (Graphics& g)
{
g.setOrigin (getX(), getY());
paintEntireComponent (g, false);
}
void Component::paintComponentAndChildren (Graphics& g)
{
const Rectangle<int> clipBounds (g.getClipBounds());
if (flags.dontClipGraphicsFlag)
{
paintComponent (g);
}
else
{
g.saveState();
ComponentHelpers::clipObscuredRegions (*this, g, clipBounds, Point<int>());
if (! g.isClipEmpty())
paintComponent (g);
g.restoreState();
}
for (int i = 0; i < childComponentList_.size(); ++i)
{
Component& child = *childComponentList_.getUnchecked (i);
if (child.isVisible())
{
if (child.affineTransform_ != 0)
{
g.saveState();
g.addTransform (*child.affineTransform_);
if ((child.flags.dontClipGraphicsFlag && ! g.isClipEmpty()) || g.reduceClipRegion (child.getBounds()))
child.paintWithinParentContext (g);
g.restoreState();
}
else if (clipBounds.intersects (child.getBounds()))
{
g.saveState();
if (child.flags.dontClipGraphicsFlag)
{
child.paintWithinParentContext (g);
}
else if (g.reduceClipRegion (child.getBounds()))
{
bool nothingClipped = true;
for (int j = i + 1; j < childComponentList_.size(); ++j)
{
const Component& sibling = *childComponentList_.getUnchecked (j);
if (sibling.flags.opaqueFlag && sibling.isVisible() && sibling.affineTransform_ == 0)
{
nothingClipped = false;
g.excludeClipRegion (sibling.getBounds());
}
}
if (nothingClipped || ! g.isClipEmpty())
child.paintWithinParentContext (g);
}
g.restoreState();
}
}
}
g.saveState();
paintOverChildren (g);
g.restoreState();
}
void Component::paintEntireComponent (Graphics& g, const bool ignoreAlphaLevel)
{
jassert (! g.isClipEmpty());
#if JUCE_DEBUG
flags.isInsidePaintCall = true;
#endif
if (effect_ != 0)
{
Image effectImage (flags.opaqueFlag ? Image::RGB : Image::ARGB,
getWidth(), getHeight(), ! flags.opaqueFlag, Image::NativeImage);
{
Graphics g2 (effectImage);
paintComponentAndChildren (g2);
}
effect_->applyEffect (effectImage, g, ignoreAlphaLevel ? 1.0f : getAlpha());
}
else if (componentTransparency > 0 && ! ignoreAlphaLevel)
{
if (componentTransparency < 255)
{
g.beginTransparencyLayer (getAlpha());
paintComponentAndChildren (g);
g.endTransparencyLayer();
}
}
else
{
paintComponentAndChildren (g);
}
#if JUCE_DEBUG
flags.isInsidePaintCall = false;
#endif
}
void Component::setPaintingIsUnclipped (const bool shouldPaintWithoutClipping) throw()
{
flags.dontClipGraphicsFlag = shouldPaintWithoutClipping;
}
//==============================================================================
const Image Component::createComponentSnapshot (const Rectangle<int>& areaToGrab,
const bool clipImageToComponentBounds)
{
Rectangle<int> r (areaToGrab);
if (clipImageToComponentBounds)
r = r.getIntersection (getLocalBounds());
Image componentImage (flags.opaqueFlag ? Image::RGB : Image::ARGB,
jmax (1, r.getWidth()),
jmax (1, r.getHeight()),
true);
Graphics imageContext (componentImage);
imageContext.setOrigin (-r.getX(), -r.getY());
paintEntireComponent (imageContext, true);
return componentImage;
}
void Component::setComponentEffect (ImageEffectFilter* const effect)
{
if (effect_ != effect)
{
effect_ = effect;
repaint();
}
}
//==============================================================================
LookAndFeel& Component::getLookAndFeel() const throw()
{
const Component* c = this;
do
{
if (c->lookAndFeel_ != 0)
return *(c->lookAndFeel_);
c = c->parentComponent_;
}
while (c != 0);
return LookAndFeel::getDefaultLookAndFeel();
}
void Component::setLookAndFeel (LookAndFeel* const newLookAndFeel)
{
if (lookAndFeel_ != newLookAndFeel)
{
lookAndFeel_ = newLookAndFeel;
sendLookAndFeelChange();
}
}
void Component::lookAndFeelChanged()
{
}
void Component::sendLookAndFeelChange()
{
repaint();
WeakReference<Component> safePointer (this);
lookAndFeelChanged();
if (safePointer != 0)
{
for (int i = childComponentList_.size(); --i >= 0;)
{
childComponentList_.getUnchecked (i)->sendLookAndFeelChange();
if (safePointer == 0)
return;
i = jmin (i, childComponentList_.size());
}
}
}
const Colour Component::findColour (const int colourId, const bool inheritFromParent) const
{
var* const v = properties.getVarPointer (ComponentHelpers::getColourPropertyId (colourId));
if (v != 0)
return Colour ((int) *v);
if (inheritFromParent && parentComponent_ != 0)
return parentComponent_->findColour (colourId, true);
return getLookAndFeel().findColour (colourId);
}
bool Component::isColourSpecified (const int colourId) const
{
return properties.contains (ComponentHelpers::getColourPropertyId (colourId));
}
void Component::removeColour (const int colourId)
{
if (properties.remove (ComponentHelpers::getColourPropertyId (colourId)))
colourChanged();
}
void Component::setColour (const int colourId, const Colour& colour)
{
if (properties.set (ComponentHelpers::getColourPropertyId (colourId), (int) colour.getARGB()))
colourChanged();
}
void Component::copyAllExplicitColoursTo (Component& target) const
{
bool changed = false;
for (int i = properties.size(); --i >= 0;)
{
const Identifier name (properties.getName(i));
if (name.toString().startsWith ("jcclr_"))
if (target.properties.set (name, properties [name]))
changed = true;
}
if (changed)
target.colourChanged();
}
void Component::colourChanged()
{
}
//==============================================================================
const Rectangle<int> Component::getLocalBounds() const throw()
{
return Rectangle<int> (getWidth(), getHeight());
}
const Rectangle<int> Component::getBoundsInParent() const throw()
{
return affineTransform_ == 0 ? bounds_
: bounds_.toFloat().transformed (*affineTransform_).getSmallestIntegerContainer();
}
void Component::getVisibleArea (RectangleList& result, const bool includeSiblings) const
{
result.clear();
const Rectangle<int> unclipped (ComponentHelpers::getUnclippedArea (*this));
if (! unclipped.isEmpty())
{
result.add (unclipped);
if (includeSiblings)
{
const Component* const c = getTopLevelComponent();
ComponentHelpers::subtractObscuredRegions (*c, result, getLocalPoint (c, Point<int>()),
c->getLocalBounds(), this);
}
ComponentHelpers::subtractObscuredRegions (*this, result, Point<int>(), unclipped, 0);
result.consolidate();
}
}
//==============================================================================
void Component::mouseEnter (const MouseEvent&)
{
// base class does nothing
}
void Component::mouseExit (const MouseEvent&)
{
// base class does nothing
}
void Component::mouseDown (const MouseEvent&)
{
// base class does nothing
}
void Component::mouseUp (const MouseEvent&)
{
// base class does nothing
}
void Component::mouseDrag (const MouseEvent&)
{
// base class does nothing
}
void Component::mouseMove (const MouseEvent&)
{
// base class does nothing
}
void Component::mouseDoubleClick (const MouseEvent&)
{
// base class does nothing
}
void Component::mouseWheelMove (const MouseEvent& e, float wheelIncrementX, float wheelIncrementY)
{
// the base class just passes this event up to its parent..
if (parentComponent_ != 0)
parentComponent_->mouseWheelMove (e.getEventRelativeTo (parentComponent_),
wheelIncrementX, wheelIncrementY);
}
//==============================================================================
void Component::resized()
{
// base class does nothing
}
void Component::moved()
{
// base class does nothing
}
void Component::childBoundsChanged (Component*)
{
// base class does nothing
}
void Component::parentSizeChanged()
{
// base class does nothing
}
void Component::addComponentListener (ComponentListener* const newListener)
{
// if component methods are being called from threads other than the message
// thread, you'll need to use a MessageManagerLock object to make sure it's thread-safe.
CHECK_MESSAGE_MANAGER_IS_LOCKED
componentListeners.add (newListener);
}
void Component::removeComponentListener (ComponentListener* const listenerToRemove)
{
componentListeners.remove (listenerToRemove);
}
//==============================================================================
void Component::inputAttemptWhenModal()
{
ModalComponentManager::getInstance()->bringModalComponentsToFront();
getLookAndFeel().playAlertSound();
}
bool Component::canModalEventBeSentToComponent (const Component*)
{
return false;
}
void Component::internalModalInputAttempt()
{
Component* const current = getCurrentlyModalComponent();
if (current != 0)
current->inputAttemptWhenModal();
}
//==============================================================================
void Component::paint (Graphics&)
{
// all painting is done in the subclasses
jassert (! isOpaque()); // if your component's opaque, you've gotta paint it!
}
void Component::paintOverChildren (Graphics&)
{
// all painting is done in the subclasses
}
//==============================================================================
void Component::postCommandMessage (const int commandId)
{
class CustomCommandMessage : public CallbackMessage
{
public:
CustomCommandMessage (Component* const target_, const int commandId_)
: target (target_), commandId (commandId_) {}
void messageCallback()
{
if (target.get() != 0) // (get() required for VS2003 bug)
target->handleCommandMessage (commandId);
}
private:
WeakReference<Component> target;
int commandId;
};
(new CustomCommandMessage (this, commandId))->post();
}
void Component::handleCommandMessage (int)
{
// used by subclasses
}
//==============================================================================
void Component::addMouseListener (MouseListener* const newListener,
const bool wantsEventsForAllNestedChildComponents)
{
// if component methods are being called from threads other than the message
// thread, you'll need to use a MessageManagerLock object to make sure it's thread-safe.
CHECK_MESSAGE_MANAGER_IS_LOCKED
// If you register a component as a mouselistener for itself, it'll receive all the events
// twice - once via the direct callback that all components get anyway, and then again as a listener!
jassert ((newListener != this) || wantsEventsForAllNestedChildComponents);
if (mouseListeners_ == 0)
mouseListeners_ = new MouseListenerList();
mouseListeners_->addListener (newListener, wantsEventsForAllNestedChildComponents);
}
void Component::removeMouseListener (MouseListener* const listenerToRemove)
{
// if component methods are being called from threads other than the message
// thread, you'll need to use a MessageManagerLock object to make sure it's thread-safe.
CHECK_MESSAGE_MANAGER_IS_LOCKED
if (mouseListeners_ != 0)
mouseListeners_->removeListener (listenerToRemove);
}
//==============================================================================
void Component::internalMouseEnter (MouseInputSource& source, const Point<int>& relativePos, const Time& time)
{
if (isCurrentlyBlockedByAnotherModalComponent())
{
// if something else is modal, always just show a normal mouse cursor
source.showMouseCursor (MouseCursor::NormalCursor);
return;
}
if (! flags.mouseInsideFlag)
{
flags.mouseInsideFlag = true;
flags.mouseOverFlag = true;
flags.mouseDownFlag = false;
BailOutChecker checker (this);
if (flags.repaintOnMouseActivityFlag)
repaint();
const MouseEvent me (source, relativePos, source.getCurrentModifiers(),
this, this, time, relativePos, time, 0, false);
mouseEnter (me);
if (checker.shouldBailOut())
return;
Desktop& desktop = Desktop::getInstance();
desktop.resetTimer();
desktop.mouseListeners.callChecked (checker, &MouseListener::mouseEnter, me);
MouseListenerList::sendMouseEvent (this, checker, &MouseListener::mouseEnter, me);
}
}
void Component::internalMouseExit (MouseInputSource& source, const Point<int>& relativePos, const Time& time)
{
BailOutChecker checker (this);
if (flags.mouseDownFlag)
{
internalMouseUp (source, relativePos, time, source.getCurrentModifiers().getRawFlags());
if (checker.shouldBailOut())
return;
}
if (flags.mouseInsideFlag || flags.mouseOverFlag)
{
flags.mouseInsideFlag = false;
flags.mouseOverFlag = false;
flags.mouseDownFlag = false;
if (flags.repaintOnMouseActivityFlag)
repaint();
const MouseEvent me (source, relativePos, source.getCurrentModifiers(),
this, this, time, relativePos, time, 0, false);
mouseExit (me);
if (checker.shouldBailOut())
return;
Desktop& desktop = Desktop::getInstance();
desktop.resetTimer();
desktop.mouseListeners.callChecked (checker, &MouseListener::mouseExit, me);
MouseListenerList::sendMouseEvent (this, checker, &MouseListener::mouseExit, me);
}
}
//==============================================================================
void Component::internalMouseDown (MouseInputSource& source, const Point<int>& relativePos, const Time& time)
{
Desktop& desktop = Desktop::getInstance();
BailOutChecker checker (this);
if (isCurrentlyBlockedByAnotherModalComponent())
{
internalModalInputAttempt();
if (checker.shouldBailOut())
return;
// If processing the input attempt has exited the modal loop, we'll allow the event
// to be delivered..
if (isCurrentlyBlockedByAnotherModalComponent())
{
// allow blocked mouse-events to go to global listeners..
const MouseEvent me (source, relativePos, source.getCurrentModifiers(),
this, this, time, relativePos, time,
source.getNumberOfMultipleClicks(), false);
desktop.resetTimer();
desktop.mouseListeners.callChecked (checker, &MouseListener::mouseDown, me);
return;
}
}
{
Component* c = this;
while (c != 0)
{
if (c->isBroughtToFrontOnMouseClick())
{
c->toFront (true);
if (checker.shouldBailOut())
return;
}
c = c->parentComponent_;
}
}
if (! flags.dontFocusOnMouseClickFlag)
{
grabFocusInternal (focusChangedByMouseClick);
if (checker.shouldBailOut())
return;
}
flags.mouseDownFlag = true;
flags.mouseOverFlag = true;
if (flags.repaintOnMouseActivityFlag)
repaint();
const MouseEvent me (source, relativePos, source.getCurrentModifiers(),
this, this, time, relativePos, time,
source.getNumberOfMultipleClicks(), false);
mouseDown (me);
if (checker.shouldBailOut())
return;
desktop.resetTimer();
desktop.mouseListeners.callChecked (checker, &MouseListener::mouseDown, me);
MouseListenerList::sendMouseEvent (this, checker, &MouseListener::mouseDown, me);
}
//==============================================================================
void Component::internalMouseUp (MouseInputSource& source, const Point<int>& relativePos, const Time& time, const ModifierKeys& oldModifiers)
{
if (flags.mouseDownFlag)
{
flags.mouseDownFlag = false;
BailOutChecker checker (this);
if (flags.repaintOnMouseActivityFlag)
repaint();
const MouseEvent me (source, relativePos,
oldModifiers, this, this, time,
getLocalPoint (0, source.getLastMouseDownPosition()),
source.getLastMouseDownTime(),
source.getNumberOfMultipleClicks(),
source.hasMouseMovedSignificantlySincePressed());
mouseUp (me);
if (checker.shouldBailOut())
return;
Desktop& desktop = Desktop::getInstance();
desktop.resetTimer();
desktop.mouseListeners.callChecked (checker, &MouseListener::mouseUp, me);
MouseListenerList::sendMouseEvent (this, checker, &MouseListener::mouseUp, me);
if (checker.shouldBailOut())
return;
// check for double-click
if (me.getNumberOfClicks() >= 2)
{
mouseDoubleClick (me);
if (checker.shouldBailOut())
return;
desktop.mouseListeners.callChecked (checker, &MouseListener::mouseDoubleClick, me);
MouseListenerList::sendMouseEvent (this, checker, &MouseListener::mouseDoubleClick, me);
}
}
}
void Component::internalMouseDrag (MouseInputSource& source, const Point<int>& relativePos, const Time& time)
{
if (flags.mouseDownFlag)
{
flags.mouseOverFlag = reallyContains (relativePos, false);
BailOutChecker checker (this);
const MouseEvent me (source, relativePos,
source.getCurrentModifiers(), this, this, time,
getLocalPoint (0, source.getLastMouseDownPosition()),
source.getLastMouseDownTime(),
source.getNumberOfMultipleClicks(),
source.hasMouseMovedSignificantlySincePressed());
mouseDrag (me);
if (checker.shouldBailOut())
return;
Desktop& desktop = Desktop::getInstance();
desktop.resetTimer();
desktop.mouseListeners.callChecked (checker, &MouseListener::mouseDrag, me);
MouseListenerList::sendMouseEvent (this, checker, &MouseListener::mouseDrag, me);
}
}
void Component::internalMouseMove (MouseInputSource& source, const Point<int>& relativePos, const Time& time)
{
Desktop& desktop = Desktop::getInstance();
BailOutChecker checker (this);
const MouseEvent me (source, relativePos, source.getCurrentModifiers(),
this, this, time, relativePos, time, 0, false);
if (isCurrentlyBlockedByAnotherModalComponent())
{
// allow blocked mouse-events to go to global listeners..
desktop.sendMouseMove();
}
else
{
flags.mouseOverFlag = true;
mouseMove (me);
if (checker.shouldBailOut())
return;
desktop.resetTimer();
desktop.mouseListeners.callChecked (checker, &MouseListener::mouseMove, me);
MouseListenerList::sendMouseEvent (this, checker, &MouseListener::mouseMove, me);
}
}
void Component::internalMouseWheel (MouseInputSource& source, const Point<int>& relativePos,
const Time& time, const float amountX, const float amountY)
{
Desktop& desktop = Desktop::getInstance();
BailOutChecker checker (this);
const float wheelIncrementX = amountX / 256.0f;
const float wheelIncrementY = amountY / 256.0f;
const MouseEvent me (source, relativePos, source.getCurrentModifiers(),
this, this, time, relativePos, time, 0, false);
if (isCurrentlyBlockedByAnotherModalComponent())
{
// allow blocked mouse-events to go to global listeners..
desktop.mouseListeners.callChecked (checker, &MouseListener::mouseWheelMove, me, wheelIncrementX, wheelIncrementY);
}
else
{
mouseWheelMove (me, wheelIncrementX, wheelIncrementY);
if (checker.shouldBailOut())
return;
desktop.mouseListeners.callChecked (checker, &MouseListener::mouseWheelMove, me, wheelIncrementX, wheelIncrementY);
MouseListenerList::sendWheelEvent (this, checker, me, wheelIncrementX, wheelIncrementY);
}
}
void Component::sendFakeMouseMove() const
{
MouseInputSource& mainMouse = Desktop::getInstance().getMainMouseSource();
if (! mainMouse.isDragging())
mainMouse.triggerFakeMove();
}
void Component::beginDragAutoRepeat (const int interval)
{
Desktop::getInstance().beginDragAutoRepeat (interval);
}
void Component::broughtToFront()
{
}
void Component::internalBroughtToFront()
{
if (flags.hasHeavyweightPeerFlag)
Desktop::getInstance().componentBroughtToFront (this);
BailOutChecker checker (this);
broughtToFront();
if (checker.shouldBailOut())
return;
componentListeners.callChecked (checker, &ComponentListener::componentBroughtToFront, *this);
if (checker.shouldBailOut())
return;
// When brought to the front and there's a modal component blocking this one,
// we need to bring the modal one to the front instead..
Component* const cm = getCurrentlyModalComponent();
if (cm != 0 && cm->getTopLevelComponent() != getTopLevelComponent())
ModalComponentManager::getInstance()->bringModalComponentsToFront();
}
void Component::focusGained (FocusChangeType)
{
// base class does nothing
}
void Component::internalFocusGain (const FocusChangeType cause)
{
internalFocusGain (cause, WeakReference<Component> (this));
}
void Component::internalFocusGain (const FocusChangeType cause, const WeakReference<Component>& safePointer)
{
focusGained (cause);
if (safePointer != 0)
internalChildFocusChange (cause, safePointer);
}
void Component::focusLost (FocusChangeType)
{
// base class does nothing
}
void Component::internalFocusLoss (const FocusChangeType cause)
{
WeakReference<Component> safePointer (this);
focusLost (focusChangedDirectly);
if (safePointer != 0)
internalChildFocusChange (cause, safePointer);
}
void Component::focusOfChildComponentChanged (FocusChangeType /*cause*/)
{
// base class does nothing
}
void Component::internalChildFocusChange (FocusChangeType cause, const WeakReference<Component>& safePointer)
{
const bool childIsNowFocused = hasKeyboardFocus (true);
if (flags.childCompFocusedFlag != childIsNowFocused)
{
flags.childCompFocusedFlag = childIsNowFocused;
focusOfChildComponentChanged (cause);
if (safePointer == 0)
return;
}
if (parentComponent_ != 0)
parentComponent_->internalChildFocusChange (cause, WeakReference<Component> (parentComponent_));
}
//==============================================================================
bool Component::isEnabled() const throw()
{
return (! flags.isDisabledFlag)
&& (parentComponent_ == 0 || parentComponent_->isEnabled());
}
void Component::setEnabled (const bool shouldBeEnabled)
{
if (flags.isDisabledFlag == shouldBeEnabled)
{
flags.isDisabledFlag = ! shouldBeEnabled;
// if any parent components are disabled, setting our flag won't make a difference,
// so no need to send a change message
if (parentComponent_ == 0 || parentComponent_->isEnabled())
sendEnablementChangeMessage();
}
}
void Component::sendEnablementChangeMessage()
{
WeakReference<Component> safePointer (this);
enablementChanged();
if (safePointer == 0)
return;
for (int i = getNumChildComponents(); --i >= 0;)
{
Component* const c = getChildComponent (i);
if (c != 0)
{
c->sendEnablementChangeMessage();
if (safePointer == 0)
return;
}
}
}
void Component::enablementChanged()
{
}
//==============================================================================
void Component::setWantsKeyboardFocus (const bool wantsFocus) throw()
{
flags.wantsFocusFlag = wantsFocus;
}
void Component::setMouseClickGrabsKeyboardFocus (const bool shouldGrabFocus)
{
flags.dontFocusOnMouseClickFlag = ! shouldGrabFocus;
}
bool Component::getMouseClickGrabsKeyboardFocus() const throw()
{
return ! flags.dontFocusOnMouseClickFlag;
}
bool Component::getWantsKeyboardFocus() const throw()
{
return flags.wantsFocusFlag && ! flags.isDisabledFlag;
}
void Component::setFocusContainer (const bool shouldBeFocusContainer) throw()
{
flags.isFocusContainerFlag = shouldBeFocusContainer;
}
bool Component::isFocusContainer() const throw()
{
return flags.isFocusContainerFlag;
}
static const Identifier juce_explicitFocusOrderId ("_jexfo");
int Component::getExplicitFocusOrder() const
{
return properties [juce_explicitFocusOrderId];
}
void Component::setExplicitFocusOrder (const int newFocusOrderIndex)
{
properties.set (juce_explicitFocusOrderId, newFocusOrderIndex);
}
KeyboardFocusTraverser* Component::createFocusTraverser()
{
if (flags.isFocusContainerFlag || parentComponent_ == 0)
return new KeyboardFocusTraverser();
return parentComponent_->createFocusTraverser();
}
void Component::takeKeyboardFocus (const FocusChangeType cause)
{
// give the focus to this component
if (currentlyFocusedComponent != this)
{
// get the focus onto our desktop window
ComponentPeer* const peer = getPeer();
if (peer != 0)
{
WeakReference<Component> safePointer (this);
peer->grabFocus();
if (peer->isFocused() && currentlyFocusedComponent != this)
{
WeakReference<Component> componentLosingFocus (currentlyFocusedComponent);
currentlyFocusedComponent = this;
Desktop::getInstance().triggerFocusCallback();
// call this after setting currentlyFocusedComponent so that the one that's
// losing it has a chance to see where focus is going
if (componentLosingFocus != 0)
componentLosingFocus->internalFocusLoss (cause);
if (currentlyFocusedComponent == this)
internalFocusGain (cause, safePointer);
}
}
}
}
void Component::grabFocusInternal (const FocusChangeType cause, const bool canTryParent)
{
if (isShowing())
{
if (flags.wantsFocusFlag && (isEnabled() || parentComponent_ == 0))
{
takeKeyboardFocus (cause);
}
else
{
if (isParentOf (currentlyFocusedComponent)
&& currentlyFocusedComponent->isShowing())
{
// do nothing if the focused component is actually a child of ours..
}
else
{
// find the default child component..
ScopedPointer <KeyboardFocusTraverser> traverser (createFocusTraverser());
if (traverser != 0)
{
Component* const defaultComp = traverser->getDefaultComponent (this);
traverser = 0;
if (defaultComp != 0)
{
defaultComp->grabFocusInternal (cause, false);
return;
}
}
if (canTryParent && parentComponent_ != 0)
{
// if no children want it and we're allowed to try our parent comp,
// then pass up to parent, which will try our siblings.
parentComponent_->grabFocusInternal (cause, true);
}
}
}
}
}
void Component::grabKeyboardFocus()
{
// if component methods are being called from threads other than the message
// thread, you'll need to use a MessageManagerLock object to make sure it's thread-safe.
CHECK_MESSAGE_MANAGER_IS_LOCKED
grabFocusInternal (focusChangedDirectly);
}
void Component::moveKeyboardFocusToSibling (const bool moveToNext)
{
// if component methods are being called from threads other than the message
// thread, you'll need to use a MessageManagerLock object to make sure it's thread-safe.
CHECK_MESSAGE_MANAGER_IS_LOCKED
if (parentComponent_ != 0)
{
ScopedPointer <KeyboardFocusTraverser> traverser (createFocusTraverser());
if (traverser != 0)
{
Component* const nextComp = moveToNext ? traverser->getNextComponent (this)
: traverser->getPreviousComponent (this);
traverser = 0;
if (nextComp != 0)
{
if (nextComp->isCurrentlyBlockedByAnotherModalComponent())
{
WeakReference<Component> nextCompPointer (nextComp);
internalModalInputAttempt();
if (nextCompPointer == 0 || nextComp->isCurrentlyBlockedByAnotherModalComponent())
return;
}
nextComp->grabFocusInternal (focusChangedByTabKey);
return;
}
}
parentComponent_->moveKeyboardFocusToSibling (moveToNext);
}
}
bool Component::hasKeyboardFocus (const bool trueIfChildIsFocused) const
{
return (currentlyFocusedComponent == this)
|| (trueIfChildIsFocused && isParentOf (currentlyFocusedComponent));
}
Component* JUCE_CALLTYPE Component::getCurrentlyFocusedComponent() throw()
{
return currentlyFocusedComponent;
}
void Component::giveAwayFocus (const bool sendFocusLossEvent)
{
Component* const componentLosingFocus = currentlyFocusedComponent;
currentlyFocusedComponent = 0;
if (sendFocusLossEvent && componentLosingFocus != 0)
componentLosingFocus->internalFocusLoss (focusChangedDirectly);
Desktop::getInstance().triggerFocusCallback();
}
//==============================================================================
bool Component::isMouseOver (const bool includeChildren) const
{
if (flags.mouseOverFlag)
return true;
if (includeChildren)
{
Desktop& desktop = Desktop::getInstance();
for (int i = desktop.getNumMouseSources(); --i >= 0;)
{
Component* const c = desktop.getMouseSource(i)->getComponentUnderMouse();
if (isParentOf (c) && c->flags.mouseOverFlag) // (mouseOverFlag checked in case it's being dragged outside the comp)
return true;
}
}
return false;
}
bool Component::isMouseButtonDown() const throw() { return flags.mouseDownFlag; }
bool Component::isMouseOverOrDragging() const throw() { return flags.mouseOverFlag || flags.mouseDownFlag; }
bool JUCE_CALLTYPE Component::isMouseButtonDownAnywhere() throw()
{
return ModifierKeys::getCurrentModifiers().isAnyMouseButtonDown();
}
const Point<int> Component::getMouseXYRelative() const
{
return getLocalPoint (0, Desktop::getMousePosition());
}
//==============================================================================
const Rectangle<int> Component::getParentMonitorArea() const
{
return Desktop::getInstance().getMonitorAreaContaining (getScreenBounds().getCentre());
}
//==============================================================================
void Component::addKeyListener (KeyListener* const newListener)
{
if (keyListeners_ == 0)
keyListeners_ = new Array <KeyListener*>();
keyListeners_->addIfNotAlreadyThere (newListener);
}
void Component::removeKeyListener (KeyListener* const listenerToRemove)
{
if (keyListeners_ != 0)
keyListeners_->removeValue (listenerToRemove);
}
bool Component::keyPressed (const KeyPress&)
{
return false;
}
bool Component::keyStateChanged (const bool /*isKeyDown*/)
{
return false;
}
void Component::modifierKeysChanged (const ModifierKeys& modifiers)
{
if (parentComponent_ != 0)
parentComponent_->modifierKeysChanged (modifiers);
}
void Component::internalModifierKeysChanged()
{
sendFakeMouseMove();
modifierKeysChanged (ModifierKeys::getCurrentModifiers());
}
//==============================================================================
ComponentPeer* Component::getPeer() const
{
if (flags.hasHeavyweightPeerFlag)
return ComponentPeer::getPeerFor (this);
else if (parentComponent_ == 0)
return 0;
return parentComponent_->getPeer();
}
//==============================================================================
Component::BailOutChecker::BailOutChecker (Component* const component)
: safePointer1 (component)
{
jassert (component != 0);
}
Component::BailOutChecker::BailOutChecker (Component* const component1, Component* const component2)
: safePointer1 (component1), safePointer2 (component2)
{
jassert (component1 != 0);
}
bool Component::BailOutChecker::shouldBailOut() const throw()
{
return safePointer1 == 0 || safePointer2.wasObjectDeleted();
}
END_JUCE_NAMESPACE
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