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591 lines
20 KiB
591 lines
20 KiB
/*
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==============================================================================
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This file is part of the JUCE library.
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Copyright (c) 2015 - ROLI Ltd.
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Permission is granted to use this software under the terms of either:
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a) the GPL v2 (or any later version)
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b) the Affero GPL v3
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Details of these licenses can be found at: www.gnu.org/licenses
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JUCE is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
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A PARTICULAR PURPOSE. See the GNU General Public License for more details.
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------------------------------------------------------------------------------
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To release a closed-source product which uses JUCE, commercial licenses are
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available: visit www.juce.com for more information.
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==============================================================================
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*/
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static uint32 lastUniquePeerID = 1;
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//==============================================================================
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ComponentPeer::ComponentPeer (Component& comp, const int flags)
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: component (comp),
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styleFlags (flags),
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constrainer (nullptr),
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lastDragAndDropCompUnderMouse (nullptr),
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uniqueID (lastUniquePeerID += 2), // increment by 2 so that this can never hit 0
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isWindowMinimised (false)
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{
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Desktop::getInstance().peers.add (this);
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}
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ComponentPeer::~ComponentPeer()
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{
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Desktop& desktop = Desktop::getInstance();
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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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const Array<ComponentPeer*>& peers = Desktop::getInstance().peers;
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for (int i = peers.size(); --i >= 0;)
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{
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ComponentPeer* const peer = peers.getUnchecked(i);
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if (&(peer->getComponent()) == component)
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return peer;
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}
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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 (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 (int touchIndex, Point<float> pos, ModifierKeys newMods, int64 time)
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{
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if (MouseInputSource* mouse = Desktop::getInstance().mouseSources->getOrCreateMouseInputSource (touchIndex))
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MouseInputSource (*mouse).handleEvent (*this, pos, time, newMods);
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}
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void ComponentPeer::handleMouseWheel (int touchIndex, Point<float> pos, int64 time, const MouseWheelDetails& wheel)
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{
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if (MouseInputSource* mouse = Desktop::getInstance().mouseSources->getOrCreateMouseInputSource (touchIndex))
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MouseInputSource (*mouse).handleWheel (*this, pos, time, wheel);
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}
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void ComponentPeer::handleMagnifyGesture (int touchIndex, Point<float> pos, int64 time, float scaleFactor)
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{
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if (MouseInputSource* mouse = Desktop::getInstance().mouseSources->getOrCreateMouseInputSource (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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ModifierKeys::updateCurrentModifiers();
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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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const Rectangle<int> peerBounds (getBounds());
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if (peerBounds.getWidth() != component.getWidth() || peerBounds.getHeight() != component.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 (peerBounds.getWidth() / (float) component.getWidth(),
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peerBounds.getHeight() / (float) component.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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}
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Component* ComponentPeer::getTargetForKeyPress()
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{
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Component* 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 (Component* const 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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ModifierKeys::updateCurrentModifiers();
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bool keyWasUsed = false;
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const KeyPress keyInfo (keyCode,
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ModifierKeys::getCurrentModifiers().withoutMouseButtons(),
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textCharacter);
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for (Component* 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 (const Array<KeyListener*>* const keyListeners = target->keyListeners)
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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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if (Component* const currentlyFocused = Component::getCurrentlyFocusedComponent())
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{
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const bool isTab = (keyInfo == KeyPress::tabKey);
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const bool isShiftTab = (keyInfo == KeyPress (KeyPress::tabKey, ModifierKeys::shiftModifier, 0));
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if (isTab || isShiftTab)
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{
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currentlyFocused->moveKeyboardFocusToSibling (isTab);
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keyWasUsed = (currentlyFocused != Component::getCurrentlyFocusedComponent());
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if (keyWasUsed || deletionChecker == nullptr)
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break;
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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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bool ComponentPeer::handleKeyUpOrDown (const bool isKeyDown)
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{
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ModifierKeys::updateCurrentModifiers();
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bool keyWasUsed = false;
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for (Component* 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 (const Array<KeyListener*>* const keyListeners = target->keyListeners)
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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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ModifierKeys::updateCurrentModifiers();
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Component* 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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if (target != nullptr)
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target->internalModifierKeysChanged();
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}
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TextInputTarget* ComponentPeer::findCurrentTextInputTarget()
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{
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Component* const c = Component::getCurrentlyFocusedComponent();
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if (c == &component || component.isParentOf (c))
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if (TextInputTarget* const 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::dismissPendingTextInput() {}
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//==============================================================================
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void ComponentPeer::handleBroughtToFront()
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{
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ModifierKeys::updateCurrentModifiers();
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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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ModifierKeys::updateCurrentModifiers();
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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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Rectangle<int> newBounds (Component::ComponentHelpers::rawPeerPositionToLocal (component, getBounds()));
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Rectangle<int> 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.bounds = 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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if (! isFullScreen())
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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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ModifierKeys::updateCurrentModifiers();
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if (component.isParentOf (lastFocusedComponent))
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{
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Component::currentlyFocusedComponent = lastFocusedComponent;
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Desktop::getInstance().triggerFocusCallback();
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lastFocusedComponent->internalFocusGain (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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ModifierKeys::updateCurrentModifiers();
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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->internalFocusLoss (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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ModifierKeys::updateCurrentModifiers();
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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<int> ComponentPeer::getAreaCoveredBy (Component& subComponent) const
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{
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return 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.size() > 0;
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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* const 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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// We'll use an async message to deliver the drop, because if the target decides
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// to run a modal loop, it can gum-up the operating system..
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class AsyncDropMessage : public CallbackMessage
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{
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public:
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AsyncDropMessage (Component* c, const ComponentPeer::DragInfo& d) : target (c), info (d) {}
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void messageCallback() override
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{
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if (Component* const c = target.get())
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{
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if (isFileDrag (info))
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dynamic_cast<FileDragAndDropTarget*> (c)->filesDropped (info.files, info.position.x, info.position.y);
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else
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dynamic_cast<TextDragAndDropTarget*> (c)->textDropped (info.text, info.position.x, info.position.y);
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}
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}
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private:
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WeakReference<Component> target;
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const ComponentPeer::DragInfo info;
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JUCE_DECLARE_NON_COPYABLE (AsyncDropMessage)
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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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ModifierKeys::updateCurrentModifiers();
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Component* const compUnderMouse = component.getComponentAt (info.position);
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Component* const lastTarget = dragAndDropTargetComponent;
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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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const Point<int> 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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const Point<int> 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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{
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handleDragMove (info);
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if (Component* const targetComp = dragAndDropTargetComponent)
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{
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dragAndDropTargetComponent = nullptr;
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lastDragAndDropCompUnderMouse = nullptr;
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if (DragHelpers::isSuitableTarget (info, targetComp))
|
|
{
|
|
if (targetComp->isCurrentlyBlockedByAnotherModalComponent())
|
|
{
|
|
targetComp->internalModalInputAttempt();
|
|
|
|
if (targetComp->isCurrentlyBlockedByAnotherModalComponent())
|
|
return true;
|
|
}
|
|
|
|
ComponentPeer::DragInfo info2 (info);
|
|
info2.position = targetComp->getLocalPoint (&component, info.position);
|
|
|
|
(new DragHelpers::AsyncDropMessage (targetComp, info2))->post();
|
|
return true;
|
|
}
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
//==============================================================================
|
|
void ComponentPeer::handleUserClosingWindow()
|
|
{
|
|
ModifierKeys::updateCurrentModifiers();
|
|
component.userTriedToCloseWindow();
|
|
}
|
|
|
|
bool ComponentPeer::setDocumentEditedStatus (bool)
|
|
{
|
|
return false;
|
|
}
|
|
|
|
void ComponentPeer::setRepresentedFile (const File&)
|
|
{
|
|
}
|
|
|
|
//==============================================================================
|
|
int ComponentPeer::getCurrentRenderingEngine() const { return 0; }
|
|
void ComponentPeer::setCurrentRenderingEngine (int index) { jassert (index == 0); (void) index; }
|
|
|