345 lines
11 KiB
C++
345 lines
11 KiB
C++
/*
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==============================================================================
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This file is part of the JUCE library.
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Copyright (c) 2017 - ROLI Ltd.
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JUCE is an open source library subject to commercial or open-source
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licensing.
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By using JUCE, you agree to the terms of both the JUCE 5 End-User License
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Agreement and JUCE 5 Privacy Policy (both updated and effective as of the
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27th April 2017).
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End User License Agreement: www.juce.com/juce-5-licence
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Privacy Policy: www.juce.com/juce-5-privacy-policy
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Or: You may also use this code under the terms of the GPL v3 (see
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www.gnu.org/licenses).
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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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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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void reset (const Rectangle<int>& finalBounds,
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float finalAlpha,
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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 = 0;
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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 = (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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if (useProxyComponent)
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proxy.reset (new ProxyComponent (*component));
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else
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proxy.reset();
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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.get()
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: component.get())
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{
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msElapsed += elapsed;
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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 : 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().findDisplayForRect (getScreenBounds()).scale;
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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 (getWidth() / (float) image.getWidth(),
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getHeight() / (float) image.getHeight()), false);
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}
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private:
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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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std::unique_ptr<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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// 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, 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() && 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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