mirror of
https://github.com/juce-framework/JUCE.git
synced 2026-01-10 23:44:24 +00:00
630 lines
21 KiB
C++
630 lines
21 KiB
C++
/*
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==============================================================================
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This file is part of the JUCE framework.
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Copyright (c) Raw Material Software Limited
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JUCE is an open source framework subject to commercial or open source
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licensing.
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By downloading, installing, or using the JUCE framework, or combining the
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JUCE framework with any other source code, object code, content or any other
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copyrightable work, you agree to the terms of the JUCE End User Licence
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Agreement, and all incorporated terms including the JUCE Privacy Policy and
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the JUCE Website Terms of Service, as applicable, which will bind you. If you
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do not agree to the terms of these agreements, we will not license the JUCE
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framework to you, and you must discontinue the installation or download
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process and cease use of the JUCE framework.
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JUCE End User Licence Agreement: https://juce.com/legal/juce-8-licence/
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JUCE Privacy Policy: https://juce.com/juce-privacy-policy
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JUCE Website Terms of Service: https://juce.com/juce-website-terms-of-service/
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Or:
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You may also use this code under the terms of the AGPLv3:
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https://www.gnu.org/licenses/agpl-3.0.en.html
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THE JUCE FRAMEWORK IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL
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WARRANTIES, WHETHER EXPRESSED OR IMPLIED, INCLUDING WARRANTY OF
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MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, ARE DISCLAIMED.
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==============================================================================
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*/
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namespace juce
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{
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static uint32 lastUniquePeerID = 1;
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//==============================================================================
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ComponentPeer::ComponentPeer (Component& comp, int flags)
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: component (comp),
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styleFlags (flags),
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uniqueID (lastUniquePeerID += 2) // increment by 2 so that this can never hit 0
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{
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auto& desktop = Desktop::getInstance();
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desktop.peers.add (this);
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desktop.addFocusChangeListener (this);
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}
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ComponentPeer::~ComponentPeer()
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{
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auto& desktop = Desktop::getInstance();
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desktop.removeFocusChangeListener (this);
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desktop.peers.removeFirstMatchingValue (this);
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desktop.triggerFocusCallback();
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}
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//==============================================================================
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int ComponentPeer::getNumPeers() noexcept
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{
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return Desktop::getInstance().peers.size();
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}
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ComponentPeer* ComponentPeer::getPeer (const int index) noexcept
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{
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return Desktop::getInstance().peers [index];
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}
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ComponentPeer* ComponentPeer::getPeerFor (const Component* const component) noexcept
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{
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for (auto* peer : Desktop::getInstance().peers)
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if (&(peer->getComponent()) == component)
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return peer;
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return nullptr;
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}
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bool ComponentPeer::isValidPeer (const ComponentPeer* const peer) noexcept
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{
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return Desktop::getInstance().peers.contains (const_cast<ComponentPeer*> (peer));
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}
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void ComponentPeer::updateBounds()
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{
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setBounds (detail::ScalingHelpers::scaledScreenPosToUnscaled (component, component.getBoundsInParent()), false);
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}
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bool ComponentPeer::isKioskMode() const
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{
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return Desktop::getInstance().getKioskModeComponent() == &component;
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}
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//==============================================================================
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void ComponentPeer::handleMouseEvent (MouseInputSource::InputSourceType type, Point<float> pos, ModifierKeys newMods,
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float newPressure, float newOrientation, int64 time, PenDetails pen, int touchIndex)
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{
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if (auto* mouse = Desktop::getInstance().mouseSources->getOrCreateMouseInputSource (type, touchIndex))
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MouseInputSource (*mouse).handleEvent (*this, pos, time, newMods, newPressure, newOrientation, pen);
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}
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void ComponentPeer::handleMouseWheel (MouseInputSource::InputSourceType type, Point<float> pos, int64 time, const MouseWheelDetails& wheel, int touchIndex)
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{
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if (auto* mouse = Desktop::getInstance().mouseSources->getOrCreateMouseInputSource (type, touchIndex))
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MouseInputSource (*mouse).handleWheel (*this, pos, time, wheel);
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}
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void ComponentPeer::handleMagnifyGesture (MouseInputSource::InputSourceType type, Point<float> pos, int64 time, float scaleFactor, int touchIndex)
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{
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if (auto* mouse = Desktop::getInstance().mouseSources->getOrCreateMouseInputSource (type, touchIndex))
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MouseInputSource (*mouse).handleMagnifyGesture (*this, pos, time, scaleFactor);
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}
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//==============================================================================
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void ComponentPeer::handlePaint (LowLevelGraphicsContext& contextToPaintTo)
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{
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Graphics g (contextToPaintTo);
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if (component.isTransformed())
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g.addTransform (component.getTransform());
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auto peerBounds = getBounds();
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auto componentBounds = component.getLocalBounds();
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if (component.isTransformed())
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componentBounds = componentBounds.transformedBy (component.getTransform());
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if (peerBounds.getWidth() != componentBounds.getWidth() || peerBounds.getHeight() != componentBounds.getHeight())
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// Tweak the scaling so that the component's integer size exactly aligns with the peer's scaled size
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g.addTransform (AffineTransform::scale ((float) peerBounds.getWidth() / (float) componentBounds.getWidth(),
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(float) peerBounds.getHeight() / (float) componentBounds.getHeight()));
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#if JUCE_ENABLE_REPAINT_DEBUGGING
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#ifdef JUCE_IS_REPAINT_DEBUGGING_ACTIVE
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if (JUCE_IS_REPAINT_DEBUGGING_ACTIVE)
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#endif
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{
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g.saveState();
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}
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#endif
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JUCE_TRY
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{
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component.paintEntireComponent (g, true);
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}
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JUCE_CATCH_EXCEPTION
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#if JUCE_ENABLE_REPAINT_DEBUGGING
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#ifdef JUCE_IS_REPAINT_DEBUGGING_ACTIVE
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if (JUCE_IS_REPAINT_DEBUGGING_ACTIVE)
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#endif
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{
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// enabling this code will fill all areas that get repainted with a colour overlay, to show
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// clearly when things are being repainted.
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g.restoreState();
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static Random rng;
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g.fillAll (Colour ((uint8) rng.nextInt (255),
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(uint8) rng.nextInt (255),
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(uint8) rng.nextInt (255),
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(uint8) 0x50));
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}
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#endif
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/** If this fails, it's probably be because your CPU floating-point precision mode has
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been set to low.. This setting is sometimes changed by things like Direct3D, and can
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mess up a lot of the calculations that the library needs to do.
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*/
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jassert (roundToInt (10.1f) == 10);
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++peerFrameNumber;
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}
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Component* ComponentPeer::getTargetForKeyPress()
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{
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auto* c = Component::getCurrentlyFocusedComponent();
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if (c == nullptr)
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c = &component;
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if (c->isCurrentlyBlockedByAnotherModalComponent())
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if (auto* currentModalComp = Component::getCurrentlyModalComponent())
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c = currentModalComp;
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return c;
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}
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bool ComponentPeer::handleKeyPress (const int keyCode, const juce_wchar textCharacter)
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{
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return handleKeyPress (KeyPress (keyCode,
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ModifierKeys::currentModifiers.withoutMouseButtons(),
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textCharacter));
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}
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bool ComponentPeer::handleKeyPress (const KeyPress& keyInfo)
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{
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bool keyWasUsed = false;
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for (auto* target = getTargetForKeyPress(); target != nullptr; target = target->getParentComponent())
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{
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const WeakReference<Component> deletionChecker (target);
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if (auto* keyListeners = target->keyListeners.get())
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{
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for (int i = keyListeners->size(); --i >= 0;)
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{
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keyWasUsed = keyListeners->getUnchecked (i)->keyPressed (keyInfo, target);
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if (keyWasUsed || deletionChecker == nullptr)
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return keyWasUsed;
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i = jmin (i, keyListeners->size());
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}
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}
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keyWasUsed = target->keyPressed (keyInfo);
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if (keyWasUsed || deletionChecker == nullptr)
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break;
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}
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if (! keyWasUsed && keyInfo.isKeyCode (KeyPress::tabKey))
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{
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if (auto* currentlyFocused = Component::getCurrentlyFocusedComponent())
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{
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currentlyFocused->moveKeyboardFocusToSibling (! keyInfo.getModifiers().isShiftDown());
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return true;
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}
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}
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return keyWasUsed;
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}
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bool ComponentPeer::handleKeyUpOrDown (const bool isKeyDown)
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{
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bool keyWasUsed = false;
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for (auto* target = getTargetForKeyPress(); target != nullptr; target = target->getParentComponent())
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{
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const WeakReference<Component> deletionChecker (target);
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keyWasUsed = target->keyStateChanged (isKeyDown);
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if (keyWasUsed || deletionChecker == nullptr)
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break;
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if (auto* keyListeners = target->keyListeners.get())
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{
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for (int i = keyListeners->size(); --i >= 0;)
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{
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keyWasUsed = keyListeners->getUnchecked (i)->keyStateChanged (isKeyDown, target);
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if (keyWasUsed || deletionChecker == nullptr)
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return keyWasUsed;
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i = jmin (i, keyListeners->size());
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}
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}
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}
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return keyWasUsed;
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}
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void ComponentPeer::handleModifierKeysChange()
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{
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auto* target = Desktop::getInstance().getMainMouseSource().getComponentUnderMouse();
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if (target == nullptr)
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target = Component::getCurrentlyFocusedComponent();
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if (target == nullptr)
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target = &component;
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target->internalModifierKeysChanged();
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}
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void ComponentPeer::refreshTextInputTarget()
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{
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const auto* lastTarget = std::exchange (textInputTarget, findCurrentTextInputTarget());
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if (lastTarget == textInputTarget)
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return;
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if (textInputTarget == nullptr)
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dismissPendingTextInput();
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else if (auto* c = Component::getCurrentlyFocusedComponent())
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textInputRequired (globalToLocal (c->getScreenPosition()), *textInputTarget);
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}
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TextInputTarget* ComponentPeer::findCurrentTextInputTarget()
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{
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auto* c = Component::getCurrentlyFocusedComponent();
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if (c == &component || component.isParentOf (c))
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if (auto* ti = dynamic_cast<TextInputTarget*> (c))
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if (ti->isTextInputActive())
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return ti;
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return nullptr;
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}
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void ComponentPeer::closeInputMethodContext() {}
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void ComponentPeer::dismissPendingTextInput()
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{
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closeInputMethodContext();
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}
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//==============================================================================
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void ComponentPeer::handleBroughtToFront()
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{
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component.internalBroughtToFront();
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}
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void ComponentPeer::setConstrainer (ComponentBoundsConstrainer* const newConstrainer) noexcept
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{
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constrainer = newConstrainer;
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}
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void ComponentPeer::handleMovedOrResized()
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{
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const bool nowMinimised = isMinimised();
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if (component.flags.hasHeavyweightPeerFlag && ! nowMinimised)
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{
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const WeakReference<Component> deletionChecker (&component);
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auto newBounds = detail::ComponentHelpers::rawPeerPositionToLocal (component, getBounds());
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auto oldBounds = component.getBounds();
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const bool wasMoved = (oldBounds.getPosition() != newBounds.getPosition());
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const bool wasResized = (oldBounds.getWidth() != newBounds.getWidth() || oldBounds.getHeight() != newBounds.getHeight());
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if (wasMoved || wasResized)
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{
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component.boundsRelativeToParent = newBounds;
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if (wasResized)
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component.repaint();
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component.sendMovedResizedMessages (wasMoved, wasResized);
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if (deletionChecker == nullptr)
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return;
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}
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}
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if (isWindowMinimised != nowMinimised)
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{
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isWindowMinimised = nowMinimised;
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component.minimisationStateChanged (nowMinimised);
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component.sendVisibilityChangeMessage();
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}
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const auto windowInSpecialState = isFullScreen() || isKioskMode() || nowMinimised;
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if (! windowInSpecialState)
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lastNonFullscreenBounds = component.getBounds();
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}
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void ComponentPeer::handleFocusGain()
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{
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if (component.isParentOf (lastFocusedComponent)
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&& lastFocusedComponent->isShowing()
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&& lastFocusedComponent->getWantsKeyboardFocus())
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{
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Component::currentlyFocusedComponent = lastFocusedComponent;
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Desktop::getInstance().triggerFocusCallback();
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lastFocusedComponent->internalKeyboardFocusGain (Component::focusChangedDirectly);
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}
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else
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{
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if (! component.isCurrentlyBlockedByAnotherModalComponent())
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component.grabKeyboardFocus();
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else
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ModalComponentManager::getInstance()->bringModalComponentsToFront();
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}
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}
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void ComponentPeer::handleFocusLoss()
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{
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if (component.hasKeyboardFocus (true))
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{
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lastFocusedComponent = Component::currentlyFocusedComponent;
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if (lastFocusedComponent != nullptr)
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{
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Component::currentlyFocusedComponent = nullptr;
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Desktop::getInstance().triggerFocusCallback();
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lastFocusedComponent->internalKeyboardFocusLoss (Component::focusChangedByMouseClick);
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}
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}
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}
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Component* ComponentPeer::getLastFocusedSubcomponent() const noexcept
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{
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return (component.isParentOf (lastFocusedComponent) && lastFocusedComponent->isShowing())
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? static_cast<Component*> (lastFocusedComponent)
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: &component;
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}
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void ComponentPeer::handleScreenSizeChange()
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{
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component.parentSizeChanged();
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handleMovedOrResized();
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}
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void ComponentPeer::setNonFullScreenBounds (const Rectangle<int>& newBounds) noexcept
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{
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lastNonFullscreenBounds = newBounds;
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}
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const Rectangle<int>& ComponentPeer::getNonFullScreenBounds() const noexcept
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{
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return lastNonFullscreenBounds;
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}
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Point<int> ComponentPeer::localToGlobal (Point<int> p) { return localToGlobal (p.toFloat()).roundToInt(); }
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Point<int> ComponentPeer::globalToLocal (Point<int> p) { return globalToLocal (p.toFloat()).roundToInt(); }
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Rectangle<int> ComponentPeer::localToGlobal (const Rectangle<int>& relativePosition)
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{
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return relativePosition.withPosition (localToGlobal (relativePosition.getPosition()));
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}
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Rectangle<int> ComponentPeer::globalToLocal (const Rectangle<int>& screenPosition)
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{
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return screenPosition.withPosition (globalToLocal (screenPosition.getPosition()));
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}
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Rectangle<float> ComponentPeer::localToGlobal (const Rectangle<float>& relativePosition)
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{
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return relativePosition.withPosition (localToGlobal (relativePosition.getPosition()));
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}
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Rectangle<float> ComponentPeer::globalToLocal (const Rectangle<float>& screenPosition)
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{
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return screenPosition.withPosition (globalToLocal (screenPosition.getPosition()));
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}
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Rectangle<int> ComponentPeer::getAreaCoveredBy (const Component& subComponent) const
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{
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return detail::ScalingHelpers::scaledScreenPosToUnscaled
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(component, component.getLocalArea (&subComponent, subComponent.getLocalBounds()));
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}
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//==============================================================================
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namespace DragHelpers
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{
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static bool isFileDrag (const ComponentPeer::DragInfo& info)
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{
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return ! info.files.isEmpty();
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}
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static bool isSuitableTarget (const ComponentPeer::DragInfo& info, Component* target)
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{
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return isFileDrag (info) ? dynamic_cast<FileDragAndDropTarget*> (target) != nullptr
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: dynamic_cast<TextDragAndDropTarget*> (target) != nullptr;
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}
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static bool isInterested (const ComponentPeer::DragInfo& info, Component* target)
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{
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return isFileDrag (info) ? dynamic_cast<FileDragAndDropTarget*> (target)->isInterestedInFileDrag (info.files)
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: dynamic_cast<TextDragAndDropTarget*> (target)->isInterestedInTextDrag (info.text);
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}
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static Component* findDragAndDropTarget (Component* c, const ComponentPeer::DragInfo& info, Component* lastOne)
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{
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for (; c != nullptr; c = c->getParentComponent())
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if (isSuitableTarget (info, c) && (c == lastOne || isInterested (info, c)))
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return c;
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return nullptr;
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}
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}
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bool ComponentPeer::handleDragMove (const ComponentPeer::DragInfo& info)
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{
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auto* compUnderMouse = component.getComponentAt (info.position);
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auto* lastTarget = dragAndDropTargetComponent.get();
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Component* newTarget = nullptr;
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if (compUnderMouse != lastDragAndDropCompUnderMouse)
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{
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lastDragAndDropCompUnderMouse = compUnderMouse;
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newTarget = DragHelpers::findDragAndDropTarget (compUnderMouse, info, lastTarget);
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if (newTarget != lastTarget)
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{
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if (lastTarget != nullptr)
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{
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if (DragHelpers::isFileDrag (info))
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dynamic_cast<FileDragAndDropTarget*> (lastTarget)->fileDragExit (info.files);
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else
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dynamic_cast<TextDragAndDropTarget*> (lastTarget)->textDragExit (info.text);
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}
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dragAndDropTargetComponent = nullptr;
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if (DragHelpers::isSuitableTarget (info, newTarget))
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{
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dragAndDropTargetComponent = newTarget;
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auto pos = newTarget->getLocalPoint (&component, info.position);
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if (DragHelpers::isFileDrag (info))
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dynamic_cast<FileDragAndDropTarget*> (newTarget)->fileDragEnter (info.files, pos.x, pos.y);
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else
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dynamic_cast<TextDragAndDropTarget*> (newTarget)->textDragEnter (info.text, pos.x, pos.y);
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}
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}
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}
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else
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{
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newTarget = lastTarget;
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}
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if (! DragHelpers::isSuitableTarget (info, newTarget))
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return false;
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auto pos = newTarget->getLocalPoint (&component, info.position);
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if (DragHelpers::isFileDrag (info))
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dynamic_cast<FileDragAndDropTarget*> (newTarget)->fileDragMove (info.files, pos.x, pos.y);
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else
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dynamic_cast<TextDragAndDropTarget*> (newTarget)->textDragMove (info.text, pos.x, pos.y);
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return true;
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}
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bool ComponentPeer::handleDragExit (const ComponentPeer::DragInfo& info)
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{
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DragInfo info2 (info);
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info2.position.setXY (-1, -1);
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const bool used = handleDragMove (info2);
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jassert (dragAndDropTargetComponent == nullptr);
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lastDragAndDropCompUnderMouse = nullptr;
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return used;
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}
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bool ComponentPeer::handleDragDrop (const ComponentPeer::DragInfo& info)
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{
|
|
handleDragMove (info);
|
|
|
|
if (WeakReference<Component> targetComp = dragAndDropTargetComponent)
|
|
{
|
|
dragAndDropTargetComponent = nullptr;
|
|
lastDragAndDropCompUnderMouse = nullptr;
|
|
|
|
if (DragHelpers::isSuitableTarget (info, targetComp))
|
|
{
|
|
if (targetComp->isCurrentlyBlockedByAnotherModalComponent())
|
|
{
|
|
targetComp->internalModalInputAttempt();
|
|
|
|
if (targetComp->isCurrentlyBlockedByAnotherModalComponent())
|
|
return true;
|
|
}
|
|
|
|
ComponentPeer::DragInfo infoCopy (info);
|
|
infoCopy.position = targetComp->getLocalPoint (&component, info.position);
|
|
|
|
// We'll use an async message to deliver the drop, because if the target decides
|
|
// to run a modal loop, it can gum-up the operating system..
|
|
MessageManager::callAsync ([=]
|
|
{
|
|
if (auto* c = targetComp.get())
|
|
{
|
|
if (DragHelpers::isFileDrag (info))
|
|
dynamic_cast<FileDragAndDropTarget*> (c)->filesDropped (infoCopy.files, infoCopy.position.x, infoCopy.position.y);
|
|
else
|
|
dynamic_cast<TextDragAndDropTarget*> (c)->textDropped (infoCopy.text, infoCopy.position.x, infoCopy.position.y);
|
|
}
|
|
});
|
|
|
|
return true;
|
|
}
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
//==============================================================================
|
|
void ComponentPeer::handleUserClosingWindow()
|
|
{
|
|
component.userTriedToCloseWindow();
|
|
}
|
|
|
|
bool ComponentPeer::setDocumentEditedStatus (bool)
|
|
{
|
|
return false;
|
|
}
|
|
|
|
void ComponentPeer::setRepresentedFile (const File&)
|
|
{
|
|
}
|
|
|
|
//==============================================================================
|
|
int ComponentPeer::getCurrentRenderingEngine() const { return 0; }
|
|
void ComponentPeer::setCurrentRenderingEngine ([[maybe_unused]] int index) { jassert (index == 0); }
|
|
|
|
//==============================================================================
|
|
std::function<ModifierKeys()> ComponentPeer::getNativeRealtimeModifiers = nullptr;
|
|
|
|
ModifierKeys ComponentPeer::getCurrentModifiersRealtime() noexcept
|
|
{
|
|
if (getNativeRealtimeModifiers != nullptr)
|
|
return getNativeRealtimeModifiers();
|
|
|
|
return ModifierKeys::currentModifiers;
|
|
}
|
|
|
|
//==============================================================================
|
|
void ComponentPeer::forceDisplayUpdate()
|
|
{
|
|
Desktop::getInstance().displays->refresh();
|
|
}
|
|
|
|
void ComponentPeer::callVBlankListeners (double timestampSec)
|
|
{
|
|
vBlankListeners.call ([timestampSec] (auto& l) { l.onVBlank (timestampSec); });
|
|
}
|
|
|
|
void ComponentPeer::globalFocusChanged ([[maybe_unused]] Component* comp)
|
|
{
|
|
refreshTextInputTarget();
|
|
}
|
|
|
|
} // namespace juce
|