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JUCE/src/gui/components/windows/juce_ComponentPeer.cpp

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/*
==============================================================================
This file is part of the JUCE library - "Jules' Utility Class Extensions"
Copyright 2004-9 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 "../../../application/juce_Application.h"
#include "../juce_Component.h"
#include "../juce_ComponentDeletionWatcher.h"
#include "../juce_Desktop.h"
#include "../../../events/juce_MessageManager.h"
#include "../../../core/juce_Time.h"
#include "../../../core/juce_Random.h"
#include "../layout/juce_ComponentBoundsConstrainer.h"
#include "../mouse/juce_FileDragAndDropTarget.h"
//#define JUCE_ENABLE_REPAINT_DEBUGGING 1
//==============================================================================
// these are over in juce_component.cpp
extern int64 juce_recentMouseDownTimes[4];
extern int juce_recentMouseDownX [4];
extern int juce_recentMouseDownY [4];
extern Component* juce_recentMouseDownComponent [4];
extern int juce_LastMousePosX;
extern int juce_LastMousePosY;
extern int juce_MouseClickCounter;
extern bool juce_MouseHasMovedSignificantlySincePressed;
static const int fakeMouseMoveMessage = 0x7fff00ff;
static VoidArray heavyweightPeers (4);
//==============================================================================
ComponentPeer::ComponentPeer (Component* const component_,
const int styleFlags_) throw()
: component (component_),
styleFlags (styleFlags_),
lastPaintTime (0),
constrainer (0),
lastFocusedComponent (0),
lastDragAndDropCompUnderMouse (0),
fakeMouseMessageSent (false),
isWindowMinimised (false)
{
heavyweightPeers.add (this);
}
ComponentPeer::~ComponentPeer()
{
heavyweightPeers.removeValue (this);
Desktop::getInstance().triggerFocusCallback();
}
//==============================================================================
int ComponentPeer::getNumPeers() throw()
{
return heavyweightPeers.size();
}
ComponentPeer* ComponentPeer::getPeer (const int index) throw()
{
return (ComponentPeer*) heavyweightPeers [index];
}
ComponentPeer* ComponentPeer::getPeerFor (const Component* const component) throw()
{
for (int i = heavyweightPeers.size(); --i >= 0;)
{
ComponentPeer* const peer = (ComponentPeer*) heavyweightPeers.getUnchecked(i);
if (peer->getComponent() == component)
return peer;
}
return 0;
}
bool ComponentPeer::isValidPeer (const ComponentPeer* const peer) throw()
{
return heavyweightPeers.contains (const_cast <ComponentPeer*> (peer));
}
void ComponentPeer::updateCurrentModifiers() throw()
{
ModifierKeys::updateCurrentModifiers();
}
//==============================================================================
void ComponentPeer::handleMouseEnter (int x, int y, const int64 time)
{
jassert (component->isValidComponent());
updateCurrentModifiers();
Component* c = component->getComponentAt (x, y);
const ComponentDeletionWatcher deletionChecker (component);
if (c != Component::componentUnderMouse && Component::componentUnderMouse != 0)
{
jassert (Component::componentUnderMouse->isValidComponent());
const int oldX = x;
const int oldY = y;
component->relativePositionToOtherComponent (Component::componentUnderMouse, x, y);
Component::componentUnderMouse->internalMouseExit (x, y, time);
Component::componentUnderMouse = 0;
if (deletionChecker.hasBeenDeleted())
return;
c = component->getComponentAt (oldX, oldY);
}
Component::componentUnderMouse = c;
if (Component::componentUnderMouse != 0)
{
component->relativePositionToOtherComponent (Component::componentUnderMouse, x, y);
Component::componentUnderMouse->internalMouseEnter (x, y, time);
}
}
void ComponentPeer::handleMouseMove (int x, int y, const int64 time)
{
jassert (component->isValidComponent());
updateCurrentModifiers();
fakeMouseMessageSent = false;
const ComponentDeletionWatcher deletionChecker (component);
Component* c = component->getComponentAt (x, y);
if (c != Component::componentUnderMouse)
{
const int oldX = x;
const int oldY = y;
if (Component::componentUnderMouse != 0)
{
component->relativePositionToOtherComponent (Component::componentUnderMouse, x, y);
Component::componentUnderMouse->internalMouseExit (x, y, time);
x = oldX;
y = oldY;
Component::componentUnderMouse = 0;
if (deletionChecker.hasBeenDeleted())
return; // if this window has just been deleted..
c = component->getComponentAt (x, y);
}
Component::componentUnderMouse = c;
if (c != 0)
{
component->relativePositionToOtherComponent (c, x, y);
c->internalMouseEnter (x, y, time);
x = oldX;
y = oldY;
if (deletionChecker.hasBeenDeleted())
return; // if this window has just been deleted..
}
}
if (Component::componentUnderMouse != 0)
{
component->relativePositionToOtherComponent (Component::componentUnderMouse, x, y);
Component::componentUnderMouse->internalMouseMove (x, y, time);
}
}
void ComponentPeer::handleMouseDown (int x, int y, const int64 time)
{
++juce_MouseClickCounter;
updateCurrentModifiers();
int numMouseButtonsDown = 0;
if (ModifierKeys::getCurrentModifiers().isLeftButtonDown())
++numMouseButtonsDown;
if (ModifierKeys::getCurrentModifiers().isRightButtonDown())
++numMouseButtonsDown;
if (ModifierKeys::getCurrentModifiers().isMiddleButtonDown())
++numMouseButtonsDown;
if (numMouseButtonsDown == 1)
{
Component::componentUnderMouse = component->getComponentAt (x, y);
if (Component::componentUnderMouse != 0)
{
// can't set these in the mouseDownInt() method, because it's re-entrant, so do it here..
for (int i = numElementsInArray (juce_recentMouseDownTimes); --i > 0;)
{
juce_recentMouseDownTimes [i] = juce_recentMouseDownTimes [i - 1];
juce_recentMouseDownX [i] = juce_recentMouseDownX [i - 1];
juce_recentMouseDownY [i] = juce_recentMouseDownY [i - 1];
juce_recentMouseDownComponent [i] = juce_recentMouseDownComponent [i - 1];
}
juce_recentMouseDownTimes[0] = time;
juce_recentMouseDownX[0] = x;
juce_recentMouseDownY[0] = y;
juce_recentMouseDownComponent[0] = Component::componentUnderMouse;
relativePositionToGlobal (juce_recentMouseDownX[0], juce_recentMouseDownY[0]);
juce_MouseHasMovedSignificantlySincePressed = false;
component->relativePositionToOtherComponent (Component::componentUnderMouse, x, y);
Component::componentUnderMouse->internalMouseDown (x, y);
}
}
}
void ComponentPeer::handleMouseDrag (int x, int y, const int64 time)
{
updateCurrentModifiers();
if (Component::componentUnderMouse != 0)
{
component->relativePositionToOtherComponent (Component::componentUnderMouse, x, y);
Component::componentUnderMouse->internalMouseDrag (x, y, time);
}
}
void ComponentPeer::handleMouseUp (const int oldModifiers, int x, int y, const int64 time)
{
updateCurrentModifiers();
int numMouseButtonsDown = 0;
if ((oldModifiers & ModifierKeys::leftButtonModifier) != 0)
++numMouseButtonsDown;
if ((oldModifiers & ModifierKeys::rightButtonModifier) != 0)
++numMouseButtonsDown;
if ((oldModifiers & ModifierKeys::middleButtonModifier) != 0)
++numMouseButtonsDown;
if (numMouseButtonsDown == 1)
{
const ComponentDeletionWatcher deletionChecker (component);
Component* c = component->getComponentAt (x, y);
if (c != Component::componentUnderMouse)
{
const int oldX = x;
const int oldY = y;
if (Component::componentUnderMouse != 0)
{
component->relativePositionToOtherComponent (Component::componentUnderMouse, x, y);
Component::componentUnderMouse->internalMouseUp (oldModifiers, x, y, time);
x = oldX;
y = oldY;
if (Component::componentUnderMouse != 0)
Component::componentUnderMouse->internalMouseExit (x, y, time);
if (deletionChecker.hasBeenDeleted())
return;
c = component->getComponentAt (oldX, oldY);
}
Component::componentUnderMouse = c;
if (Component::componentUnderMouse != 0)
{
component->relativePositionToOtherComponent (Component::componentUnderMouse, x, y);
Component::componentUnderMouse->internalMouseEnter (x, y, time);
}
}
else
{
if (Component::componentUnderMouse != 0)
{
component->relativePositionToOtherComponent (Component::componentUnderMouse, x, y);
Component::componentUnderMouse->internalMouseUp (oldModifiers, x, y, time);
}
}
}
}
void ComponentPeer::handleMouseExit (int x, int y, const int64 time)
{
jassert (component->isValidComponent());
updateCurrentModifiers();
if (Component::componentUnderMouse != 0)
{
component->relativePositionToOtherComponent (Component::componentUnderMouse, x, y);
Component::componentUnderMouse->internalMouseExit (x, y, time);
Component::componentUnderMouse = 0;
}
}
void ComponentPeer::handleMouseWheel (const int amountX, const int amountY, const int64 time)
{
updateCurrentModifiers();
if (Component::componentUnderMouse != 0)
Component::componentUnderMouse->internalMouseWheel (amountX, amountY, time);
}
void ComponentPeer::sendFakeMouseMove() throw()
{
if ((! fakeMouseMessageSent)
&& component->flags.hasHeavyweightPeerFlag
&& ! ModifierKeys::getCurrentModifiers().isAnyMouseButtonDown())
{
if (! isMinimised())
{
int realX, realY, realW, realH;
getBounds (realX, realY, realW, realH);
component->bounds_.setBounds (realX, realY, realW, realH);
}
int x, y;
component->getMouseXYRelative (x, y);
if (((unsigned int) x) < (unsigned int) component->getWidth()
&& ((unsigned int) y) < (unsigned int) component->getHeight()
&& contains (x, y, false))
{
postMessage (new Message (fakeMouseMoveMessage, x, y, 0));
}
fakeMouseMessageSent = true;
}
}
void ComponentPeer::handleMessage (const Message& message)
{
if (message.intParameter1 == fakeMouseMoveMessage)
{
if (! ModifierKeys::getCurrentModifiers().isAnyMouseButtonDown())
handleMouseMove (message.intParameter2,
message.intParameter3,
Time::currentTimeMillis());
}
}
//==============================================================================
void ComponentPeer::handlePaint (LowLevelGraphicsContext& contextToPaintTo)
{
Graphics g (&contextToPaintTo);
#if JUCE_ENABLE_REPAINT_DEBUGGING
g.saveState();
#endif
JUCE_TRY
{
component->paintEntireComponent (g);
}
JUCE_CATCH_EXCEPTION
#if JUCE_ENABLE_REPAINT_DEBUGGING
// enabling this code will fill all areas that get repainted with a colour overlay, to show
// clearly when things are being repainted.
{
g.restoreState();
g.fillAll (Colour ((uint8) Random::getSystemRandom().nextInt (255),
(uint8) Random::getSystemRandom().nextInt (255),
(uint8) Random::getSystemRandom().nextInt (255),
(uint8) 0x50));
}
#endif
}
bool ComponentPeer::handleKeyPress (const int keyCode,
const juce_wchar textCharacter)
{
updateCurrentModifiers();
Component* target = Component::currentlyFocusedComponent->isValidComponent()
? Component::currentlyFocusedComponent
: component;
if (target->isCurrentlyBlockedByAnotherModalComponent())
{
Component* const currentModalComp = Component::getCurrentlyModalComponent();
if (currentModalComp != 0)
target = currentModalComp;
}
const KeyPress keyInfo (keyCode,
ModifierKeys::getCurrentModifiers().getRawFlags()
& ModifierKeys::allKeyboardModifiers,
textCharacter);
bool keyWasUsed = false;
while (target != 0)
{
const ComponentDeletionWatcher deletionChecker (target);
if (target->keyListeners_ != 0)
{
for (int i = target->keyListeners_->size(); --i >= 0;)
{
keyWasUsed = ((KeyListener*) target->keyListeners_->getUnchecked(i))->keyPressed (keyInfo, target);
if (keyWasUsed || deletionChecker.hasBeenDeleted())
return keyWasUsed;
i = jmin (i, target->keyListeners_->size());
}
}
keyWasUsed = target->keyPressed (keyInfo);
if (keyWasUsed || deletionChecker.hasBeenDeleted())
break;
if (keyInfo.isKeyCode (KeyPress::tabKey) && Component::getCurrentlyFocusedComponent() != 0)
{
Component* const currentlyFocused = Component::getCurrentlyFocusedComponent();
currentlyFocused->moveKeyboardFocusToSibling (! keyInfo.getModifiers().isShiftDown());
keyWasUsed = (currentlyFocused != Component::getCurrentlyFocusedComponent());
break;
}
target = target->parentComponent_;
}
return keyWasUsed;
}
bool ComponentPeer::handleKeyUpOrDown (const bool isKeyDown)
{
updateCurrentModifiers();
Component* target = Component::currentlyFocusedComponent->isValidComponent()
? Component::currentlyFocusedComponent
: component;
if (target->isCurrentlyBlockedByAnotherModalComponent())
{
Component* const currentModalComp = Component::getCurrentlyModalComponent();
if (currentModalComp != 0)
target = currentModalComp;
}
bool keyWasUsed = false;
while (target != 0)
{
const ComponentDeletionWatcher deletionChecker (target);
keyWasUsed = target->keyStateChanged (isKeyDown);
if (keyWasUsed || deletionChecker.hasBeenDeleted())
break;
if (target->keyListeners_ != 0)
{
for (int i = target->keyListeners_->size(); --i >= 0;)
{
keyWasUsed = ((KeyListener*) target->keyListeners_->getUnchecked(i))->keyStateChanged (isKeyDown, target);
if (keyWasUsed || deletionChecker.hasBeenDeleted())
return keyWasUsed;
i = jmin (i, target->keyListeners_->size());
}
}
target = target->parentComponent_;
}
return keyWasUsed;
}
void ComponentPeer::handleModifierKeysChange()
{
updateCurrentModifiers();
Component* target = Component::getComponentUnderMouse();
if (target == 0)
target = Component::getCurrentlyFocusedComponent();
if (target == 0)
target = component;
if (target->isValidComponent())
target->internalModifierKeysChanged();
}
//==============================================================================
void ComponentPeer::handleBroughtToFront()
{
updateCurrentModifiers();
if (component != 0)
component->internalBroughtToFront();
}
void ComponentPeer::setConstrainer (ComponentBoundsConstrainer* const newConstrainer) throw()
{
constrainer = newConstrainer;
}
void ComponentPeer::handleMovedOrResized()
{
jassert (component->isValidComponent());
updateCurrentModifiers();
const bool nowMinimised = isMinimised();
if (component->flags.hasHeavyweightPeerFlag && ! nowMinimised)
{
const ComponentDeletionWatcher deletionChecker (component);
int realX, realY, realW, realH;
getBounds (realX, realY, realW, realH);
const bool wasMoved = (component->getX() != realX || component->getY() != realY);
const bool wasResized = (component->getWidth() != realW || component->getHeight() != realH);
if (wasMoved || wasResized)
{
component->bounds_.setBounds (realX, realY, realW, realH);
if (wasResized)
component->repaint();
component->sendMovedResizedMessages (wasMoved, wasResized);
if (deletionChecker.hasBeenDeleted())
return;
}
}
if (isWindowMinimised != nowMinimised)
{
isWindowMinimised = nowMinimised;
component->minimisationStateChanged (nowMinimised);
component->sendVisibilityChangeMessage();
}
if (! isFullScreen())
lastNonFullscreenBounds = component->getBounds();
}
void ComponentPeer::handleFocusGain()
{
updateCurrentModifiers();
if (component->isParentOf (lastFocusedComponent))
{
Component::currentlyFocusedComponent = lastFocusedComponent;
Desktop::getInstance().triggerFocusCallback();
lastFocusedComponent->internalFocusGain (Component::focusChangedDirectly);
}
else
{
if (! component->isCurrentlyBlockedByAnotherModalComponent())
component->grabKeyboardFocus();
else
Component::bringModalComponentToFront();
}
}
void ComponentPeer::handleFocusLoss()
{
updateCurrentModifiers();
if (component->hasKeyboardFocus (true))
{
lastFocusedComponent = Component::currentlyFocusedComponent;
if (lastFocusedComponent != 0)
{
Component::currentlyFocusedComponent = 0;
Desktop::getInstance().triggerFocusCallback();
lastFocusedComponent->internalFocusLoss (Component::focusChangedByMouseClick);
}
}
}
Component* ComponentPeer::getLastFocusedSubcomponent() const throw()
{
return (component->isParentOf (lastFocusedComponent) && lastFocusedComponent->isShowing())
? lastFocusedComponent
: component;
}
void ComponentPeer::handleScreenSizeChange()
{
updateCurrentModifiers();
component->parentSizeChanged();
handleMovedOrResized();
}
void ComponentPeer::setNonFullScreenBounds (const Rectangle& newBounds) throw()
{
lastNonFullscreenBounds = newBounds;
}
const Rectangle& ComponentPeer::getNonFullScreenBounds() const throw()
{
return lastNonFullscreenBounds;
}
//==============================================================================
static FileDragAndDropTarget* findDragAndDropTarget (Component* c,
const StringArray& files,
FileDragAndDropTarget* const lastOne)
{
while (c != 0)
{
FileDragAndDropTarget* const t = dynamic_cast <FileDragAndDropTarget*> (c);
if (t != 0 && (t == lastOne || t->isInterestedInFileDrag (files)))
return t;
c = c->getParentComponent();
}
return 0;
}
void ComponentPeer::handleFileDragMove (const StringArray& files, int x, int y)
{
updateCurrentModifiers();
FileDragAndDropTarget* lastTarget = 0;
if (dragAndDropTargetComponent != 0 && ! dragAndDropTargetComponent->hasBeenDeleted())
lastTarget = const_cast <FileDragAndDropTarget*> (dynamic_cast <const FileDragAndDropTarget*> (dragAndDropTargetComponent->getComponent()));
FileDragAndDropTarget* newTarget = 0;
Component* const compUnderMouse = component->getComponentAt (x, y);
if (compUnderMouse != lastDragAndDropCompUnderMouse)
{
lastDragAndDropCompUnderMouse = compUnderMouse;
newTarget = findDragAndDropTarget (compUnderMouse, files, lastTarget);
if (newTarget != lastTarget)
{
if (lastTarget != 0)
lastTarget->fileDragExit (files);
dragAndDropTargetComponent = 0;
if (newTarget != 0)
{
Component* const targetComp = dynamic_cast <Component*> (newTarget);
int mx = x, my = y;
component->relativePositionToOtherComponent (targetComp, mx, my);
dragAndDropTargetComponent = new ComponentDeletionWatcher (dynamic_cast <Component*> (newTarget));
newTarget->fileDragEnter (files, mx, my);
}
}
}
else
{
newTarget = lastTarget;
}
if (newTarget != 0)
{
Component* const targetComp = dynamic_cast <Component*> (newTarget);
component->relativePositionToOtherComponent (targetComp, x, y);
newTarget->fileDragMove (files, x, y);
}
}
void ComponentPeer::handleFileDragExit (const StringArray& files)
{
handleFileDragMove (files, -1, -1);
jassert (dragAndDropTargetComponent == 0);
lastDragAndDropCompUnderMouse = 0;
}
void ComponentPeer::handleFileDragDrop (const StringArray& files, int x, int y)
{
handleFileDragMove (files, x, y);
if (dragAndDropTargetComponent != 0 && ! dragAndDropTargetComponent->hasBeenDeleted())
{
FileDragAndDropTarget* const target = const_cast <FileDragAndDropTarget*> (dynamic_cast <const FileDragAndDropTarget*> (dragAndDropTargetComponent->getComponent()));
dragAndDropTargetComponent = 0;
lastDragAndDropCompUnderMouse = 0;
if (target != 0)
{
Component* const targetComp = dynamic_cast <Component*> (target);
if (targetComp->isCurrentlyBlockedByAnotherModalComponent())
{
targetComp->internalModalInputAttempt();
if (targetComp->isCurrentlyBlockedByAnotherModalComponent())
return;
}
component->relativePositionToOtherComponent (targetComp, x, y);
target->filesDropped (files, x, y);
}
}
}
//==============================================================================
void ComponentPeer::handleUserClosingWindow()
{
updateCurrentModifiers();
component->userTriedToCloseWindow();
}
//==============================================================================
void ComponentPeer::bringModalComponentToFront()
{
Component::bringModalComponentToFront();
}
//==============================================================================
void ComponentPeer::clearMaskedRegion() throw()
{
maskedRegion.clear();
}
void ComponentPeer::addMaskedRegion (int x, int y, int w, int h) throw()
{
maskedRegion.add (x, y, w, h);
}
//==============================================================================
const StringArray ComponentPeer::getAvailableRenderingEngines() throw()
{
StringArray s;
s.add ("Software Renderer");
return s;
}
int ComponentPeer::getCurrentRenderingEngine() throw()
{
return 0;
}
void ComponentPeer::setCurrentRenderingEngine (int /*index*/) throw()
{
}
END_JUCE_NAMESPACE
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