mirror of
https://github.com/juce-framework/JUCE.git
synced 2026-01-15 00:24:19 +00:00
135 lines
3.7 KiB
C++
135 lines
3.7 KiB
C++
/*
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==============================================================================
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This file is part of the JUCE 7 technical preview.
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Copyright (c) 2022 - Raw Material Software Limited
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You may use this code under the terms of the GPL v3
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(see www.gnu.org/licenses).
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For the technical preview this file cannot be licensed commercially.
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JUCE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL WARRANTIES, WHETHER
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EXPRESSED OR IMPLIED, INCLUDING MERCHANTABILITY AND FITNESS FOR PURPOSE, ARE
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DISCLAIMED.
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==============================================================================
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*/
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namespace juce
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{
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ComponentMovementWatcher::ComponentMovementWatcher (Component* const comp)
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: component (comp),
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wasShowing (comp->isShowing())
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{
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jassert (component != nullptr); // can't use this with a null pointer..
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component->addComponentListener (this);
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registerWithParentComps();
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}
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ComponentMovementWatcher::~ComponentMovementWatcher()
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{
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if (component != nullptr)
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component->removeComponentListener (this);
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unregister();
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}
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//==============================================================================
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void ComponentMovementWatcher::componentParentHierarchyChanged (Component&)
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{
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if (component != nullptr && ! reentrant)
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{
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const ScopedValueSetter<bool> setter (reentrant, true);
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auto* peer = component->getPeer();
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auto peerID = peer != nullptr ? peer->getUniqueID() : 0;
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if (peerID != lastPeerID)
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{
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componentPeerChanged();
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if (component == nullptr)
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return;
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lastPeerID = peerID;
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}
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unregister();
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registerWithParentComps();
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componentMovedOrResized (*component, true, true);
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if (component != nullptr)
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componentVisibilityChanged (*component);
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}
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}
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void ComponentMovementWatcher::componentMovedOrResized (Component&, bool wasMoved, bool wasResized)
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{
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if (component != nullptr)
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{
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if (wasMoved)
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{
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Point<int> newPos;
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auto* top = component->getTopLevelComponent();
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if (top != component)
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newPos = top->getLocalPoint (component, Point<int>());
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else
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newPos = top->getPosition();
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wasMoved = lastBounds.getPosition() != newPos;
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lastBounds.setPosition (newPos);
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}
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wasResized = (lastBounds.getWidth() != component->getWidth() || lastBounds.getHeight() != component->getHeight());
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lastBounds.setSize (component->getWidth(), component->getHeight());
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if (wasMoved || wasResized)
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componentMovedOrResized (wasMoved, wasResized);
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}
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}
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void ComponentMovementWatcher::componentBeingDeleted (Component& comp)
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{
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registeredParentComps.removeFirstMatchingValue (&comp);
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if (component == &comp)
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unregister();
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}
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void ComponentMovementWatcher::componentVisibilityChanged (Component&)
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{
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if (component != nullptr)
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{
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const bool isShowingNow = component->isShowing();
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if (wasShowing != isShowingNow)
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{
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wasShowing = isShowingNow;
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componentVisibilityChanged();
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}
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}
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}
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void ComponentMovementWatcher::registerWithParentComps()
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{
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for (auto* p = component->getParentComponent(); p != nullptr; p = p->getParentComponent())
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{
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p->addComponentListener (this);
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registeredParentComps.add (p);
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}
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}
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void ComponentMovementWatcher::unregister()
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{
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for (auto* c : registeredParentComps)
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c->removeComponentListener (this);
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registeredParentComps.clear();
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}
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} // namespace juce
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