mirror of
https://github.com/juce-framework/JUCE.git
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379 lines
13 KiB
C++
379 lines
13 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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class ComponentAnimator::AnimationTask
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{
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public:
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AnimationTask (Component* c) noexcept : component (c) {}
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~AnimationTask()
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{
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proxy.deleteAndZero();
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}
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void reset (const Rectangle<int>& finalBounds,
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float finalAlpha,
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int millisecondsBeforeStartMoving,
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int millisecondsToSpendMoving,
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bool useProxyComponent,
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double startSpd, double endSpd)
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{
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msElapsed = -jmax (0, millisecondsBeforeStartMoving);
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msTotal = jmax (1, millisecondsToSpendMoving);
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lastProgress = 0;
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destination = finalBounds;
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destAlpha = finalAlpha;
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isMoving = (finalBounds != component->getBounds());
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isChangingAlpha = ! approximatelyEqual (finalAlpha, component->getAlpha());
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left = component->getX();
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top = component->getY();
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right = component->getRight();
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bottom = component->getBottom();
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alpha = component->getAlpha();
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const double invTotalDistance = 4.0 / (startSpd + endSpd + 2.0);
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startSpeed = jmax (0.0, startSpd * invTotalDistance);
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midSpeed = invTotalDistance;
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endSpeed = jmax (0.0, endSpd * invTotalDistance);
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proxy.deleteAndZero();
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if (useProxyComponent)
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proxy = new ProxyComponent (*component);
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component->setVisible (! useProxyComponent);
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}
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bool useTimeslice (const int elapsed)
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{
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if (auto* c = proxy != nullptr ? proxy.getComponent()
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: component.get())
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{
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msElapsed += elapsed;
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if (msElapsed < 0)
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return true;
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double newProgress = msElapsed / (double) msTotal;
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if (newProgress >= 0 && newProgress < 1.0)
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{
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const WeakReference<AnimationTask> weakRef (this);
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newProgress = timeToDistance (newProgress);
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const double delta = (newProgress - lastProgress) / (1.0 - lastProgress);
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jassert (newProgress >= lastProgress);
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lastProgress = newProgress;
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if (delta < 1.0)
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{
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bool stillBusy = false;
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if (isMoving)
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{
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left += (destination.getX() - left) * delta;
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top += (destination.getY() - top) * delta;
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right += (destination.getRight() - right) * delta;
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bottom += (destination.getBottom() - bottom) * delta;
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const Rectangle<int> newBounds (roundToInt (left),
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roundToInt (top),
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roundToInt (right - left),
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roundToInt (bottom - top));
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if (newBounds != destination)
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{
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c->setBounds (newBounds);
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stillBusy = true;
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}
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}
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// Check whether the animation was cancelled/deleted during
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// a callback during the setBounds method
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if (weakRef.wasObjectDeleted())
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return false;
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if (isChangingAlpha)
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{
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alpha += (destAlpha - alpha) * delta;
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c->setAlpha ((float) alpha);
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stillBusy = true;
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}
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if (stillBusy)
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return true;
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}
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}
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}
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moveToFinalDestination();
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return false;
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}
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void moveToFinalDestination()
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{
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if (component != nullptr)
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{
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const WeakReference<AnimationTask> weakRef (this);
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component->setAlpha ((float) destAlpha);
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component->setBounds (destination);
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if (! weakRef.wasObjectDeleted())
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if (proxy != nullptr)
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component->setVisible (destAlpha > 0);
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}
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}
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//==============================================================================
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struct ProxyComponent final : public Component
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{
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ProxyComponent (Component& c)
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{
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setWantsKeyboardFocus (false);
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setBounds (c.getBounds());
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setTransform (c.getTransform());
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setAlpha (c.getAlpha());
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setInterceptsMouseClicks (false, false);
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if (auto* parent = c.getParentComponent())
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parent->addAndMakeVisible (this);
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else if (c.isOnDesktop() && c.getPeer() != nullptr)
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addToDesktop (c.getPeer()->getStyleFlags() | ComponentPeer::windowIgnoresKeyPresses);
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else
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jassertfalse; // seem to be trying to animate a component that's not visible
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auto scale = (float) Desktop::getInstance().getDisplays().getDisplayForRect (getScreenBounds())->scale
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* Component::getApproximateScaleFactorForComponent (&c);
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image = c.createComponentSnapshot (c.getLocalBounds(), false, scale);
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setVisible (true);
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toBehind (&c);
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}
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void paint (Graphics& g) override
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{
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g.setOpacity (1.0f);
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g.drawImageTransformed (image, AffineTransform::scale ((float) getWidth() / (float) jmax (1, image.getWidth()),
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(float) getHeight() / (float) jmax (1, image.getHeight())), false);
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}
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private:
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std::unique_ptr<AccessibilityHandler> createAccessibilityHandler() override
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{
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return createIgnoredAccessibilityHandler (*this);
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}
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Image image;
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JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (ProxyComponent)
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};
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WeakReference<Component> component;
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Component::SafePointer<Component> proxy;
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Rectangle<int> destination;
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double destAlpha;
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int msElapsed, msTotal;
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double startSpeed, midSpeed, endSpeed, lastProgress;
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double left, top, right, bottom, alpha;
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bool isMoving, isChangingAlpha;
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private:
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double timeToDistance (const double time) const noexcept
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{
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return (time < 0.5) ? time * (startSpeed + time * (midSpeed - startSpeed))
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: 0.5 * (startSpeed + 0.5 * (midSpeed - startSpeed))
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+ (time - 0.5) * (midSpeed + (time - 0.5) * (endSpeed - midSpeed));
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}
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JUCE_DECLARE_WEAK_REFERENCEABLE (AnimationTask)
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JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (AnimationTask)
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};
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//==============================================================================
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ComponentAnimator::ComponentAnimator() : lastTime (0) {}
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ComponentAnimator::~ComponentAnimator() {}
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//==============================================================================
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ComponentAnimator::AnimationTask* ComponentAnimator::findTaskFor (Component* const component) const noexcept
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{
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for (int i = tasks.size(); --i >= 0;)
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if (component == tasks.getUnchecked (i)->component.get())
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return tasks.getUnchecked (i);
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return nullptr;
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}
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void ComponentAnimator::animateComponent (Component* const component,
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const Rectangle<int>& finalBounds,
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const float finalAlpha,
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const int millisecondsToSpendMoving,
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const bool useProxyComponent,
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const double startSpeed,
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const double endSpeed)
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{
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animateComponent(component, finalBounds, finalAlpha, 0, millisecondsToSpendMoving, useProxyComponent, startSpeed, endSpeed);
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}
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void ComponentAnimator::animateComponent (Component* const component,
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const Rectangle<int>& finalBounds,
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const float finalAlpha,
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const int millisecondsBeforeStartMoving,
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const int millisecondsToSpendMoving,
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const bool useProxyComponent,
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const double startSpeed,
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const double endSpeed)
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{
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// the speeds must be 0 or greater!
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jassert (startSpeed >= 0 && endSpeed >= 0);
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if (component != nullptr)
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{
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auto* at = findTaskFor (component);
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if (at == nullptr)
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{
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at = new AnimationTask (component);
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tasks.add (at);
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sendChangeMessage();
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}
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at->reset (finalBounds, finalAlpha,
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millisecondsBeforeStartMoving, millisecondsToSpendMoving,
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useProxyComponent, startSpeed, endSpeed);
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if (! isTimerRunning())
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{
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lastTime = Time::getMillisecondCounter();
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startTimerHz (50);
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}
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}
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}
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void ComponentAnimator::fadeOut (Component* component, int millisecondsToTake)
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{
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if (component != nullptr)
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{
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if (component->isShowing() && millisecondsToTake > 0)
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animateComponent (component, component->getBounds(), 0.0f, millisecondsToTake, true, 1.0, 1.0);
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component->setVisible (false);
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}
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}
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void ComponentAnimator::fadeIn (Component* component, int millisecondsToTake)
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{
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if (component != nullptr && ! (component->isVisible() && approximatelyEqual (component->getAlpha(), 1.0f)))
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{
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component->setAlpha (0.0f);
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component->setVisible (true);
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animateComponent (component, component->getBounds(), 1.0f, millisecondsToTake, false, 1.0, 1.0);
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}
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}
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void ComponentAnimator::cancelAllAnimations (const bool moveComponentsToTheirFinalPositions)
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{
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if (tasks.size() > 0)
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{
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if (moveComponentsToTheirFinalPositions)
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for (int i = tasks.size(); --i >= 0;)
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tasks.getUnchecked (i)->moveToFinalDestination();
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tasks.clear();
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sendChangeMessage();
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}
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}
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void ComponentAnimator::cancelAnimation (Component* const component,
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const bool moveComponentToItsFinalPosition)
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{
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if (auto* at = findTaskFor (component))
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{
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if (moveComponentToItsFinalPosition)
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at->moveToFinalDestination();
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tasks.removeObject (at);
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sendChangeMessage();
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}
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}
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Rectangle<int> ComponentAnimator::getComponentDestination (Component* const component)
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{
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jassert (component != nullptr);
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if (auto* at = findTaskFor (component))
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return at->destination;
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return component->getBounds();
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}
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bool ComponentAnimator::isAnimating (Component* component) const noexcept
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{
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return findTaskFor (component) != nullptr;
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}
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bool ComponentAnimator::isAnimating() const noexcept
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{
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return tasks.size() != 0;
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}
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void ComponentAnimator::timerCallback()
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{
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auto timeNow = Time::getMillisecondCounter();
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if (lastTime == 0)
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lastTime = timeNow;
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auto elapsed = (int) (timeNow - lastTime);
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for (auto* task : Array<AnimationTask*> (tasks.begin(), tasks.size()))
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{
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if (tasks.contains (task) && ! task->useTimeslice (elapsed))
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{
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tasks.removeObject (task);
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sendChangeMessage();
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}
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}
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lastTime = timeNow;
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if (tasks.size() == 0)
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stopTimer();
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}
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} // namespace juce
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