git subrepo clone --branch=sono6good https://github.com/essej/JUCE.git deps/juce
subrepo: subdir: "deps/juce" merged: "b13f9084e" upstream: origin: "https://github.com/essej/JUCE.git" branch: "sono6good" commit: "b13f9084e" git-subrepo: version: "0.4.3" origin: "https://github.com/ingydotnet/git-subrepo.git" commit: "2f68596"
This commit is contained in:
essej
261
deps/juce/examples/Utilities/TimersAndEventsDemo.h
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deps/juce/examples/Utilities/TimersAndEventsDemo.h
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/*
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==============================================================================
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This file is part of the JUCE examples.
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Copyright (c) 2020 - Raw Material Software Limited
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The code included in this file is provided under the terms of the ISC license
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http://www.isc.org/downloads/software-support-policy/isc-license. Permission
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To use, copy, modify, and/or distribute this software for any purpose with or
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without fee is hereby granted provided that the above copyright notice and
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this permission notice appear in all copies.
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THE SOFTWARE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL WARRANTIES,
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WHETHER EXPRESSED OR IMPLIED, INCLUDING MERCHANTABILITY AND FITNESS FOR
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PURPOSE, ARE DISCLAIMED.
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==============================================================================
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*/
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/*******************************************************************************
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The block below describes the properties of this PIP. A PIP is a short snippet
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of code that can be read by the Projucer and used to generate a JUCE project.
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BEGIN_JUCE_PIP_METADATA
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name: TimersAndEventsDemo
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version: 1.0.0
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vendor: JUCE
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website: http://juce.com
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description: Application using timers and events.
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dependencies: juce_core, juce_data_structures, juce_events, juce_graphics,
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juce_gui_basics
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exporters: xcode_mac, vs2019, linux_make, androidstudio, xcode_iphone
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moduleFlags: JUCE_STRICT_REFCOUNTEDPOINTER=1
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type: Component
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mainClass: TimersAndEventsDemo
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useLocalCopy: 1
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END_JUCE_PIP_METADATA
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*******************************************************************************/
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#pragma once
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#include "../Assets/DemoUtilities.h"
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//==============================================================================
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/** Simple message that holds a Colour. */
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struct ColourMessage : public Message
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{
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ColourMessage (Colour col) : colour (col) {}
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/** Returns the colour of a ColourMessage of white if the message is not a ColourMessage. */
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static Colour getColour (const Message& message)
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{
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if (auto* cm = dynamic_cast<const ColourMessage*> (&message))
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return cm->colour;
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return Colours::white;
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}
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Colour colour;
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JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (ColourMessage)
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};
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//==============================================================================
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/** Simple component that can be triggered to flash.
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The flash will then fade using a Timer to repaint itself and will send a change
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message once it is finished.
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*/
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class FlashingComponent : public Component,
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public MessageListener,
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public ChangeBroadcaster,
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private Timer
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{
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public:
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FlashingComponent() {}
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void startFlashing()
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{
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flashAlpha = 1.0f;
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startTimerHz (25);
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}
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/** Stops this component flashing without sending a change message. */
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void stopFlashing()
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{
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flashAlpha = 0.0f;
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stopTimer();
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repaint();
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}
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/** Sets the colour of the component. */
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void setFlashColour (const Colour newColour)
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{
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colour = newColour;
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repaint();
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}
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/** Draws our component. */
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void paint (Graphics& g) override
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{
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g.setColour (colour.overlaidWith (Colours::white.withAlpha (flashAlpha)));
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g.fillEllipse (getLocalBounds().toFloat());
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}
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/** Custom mouse handler to trigger a flash. */
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void mouseDown (const MouseEvent&) override
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{
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startFlashing();
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}
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/** Message listener callback used to change our colour */
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void handleMessage (const Message& message) override
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{
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setFlashColour (ColourMessage::getColour (message));
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}
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private:
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float flashAlpha = 0.0f;
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Colour colour { Colours::red };
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void timerCallback() override
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{
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// Reduce the alpha level of the flash slightly so it fades out
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flashAlpha -= 0.075f;
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if (flashAlpha < 0.05f)
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{
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stopFlashing();
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sendChangeMessage();
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// Once we've finished flashing send a change message to trigger the next component to flash
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}
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repaint();
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}
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JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (FlashingComponent)
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};
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//==============================================================================
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class TimersAndEventsDemo : public Component,
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private ChangeListener
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{
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public:
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TimersAndEventsDemo()
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{
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setOpaque (true);
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// Create and add our FlashingComponents with some random colours and sizes
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for (int i = 0; i < numFlashingComponents; ++i)
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{
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auto* newFlasher = new FlashingComponent();
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flashingComponents.add (newFlasher);
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newFlasher->setFlashColour (getRandomBrightColour());
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newFlasher->addChangeListener (this);
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auto diameter = 25 + random.nextInt (75);
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newFlasher->setSize (diameter, diameter);
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addAndMakeVisible (newFlasher);
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}
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addAndMakeVisible (stopButton);
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stopButton.onClick = [this] { stopButtonClicked(); };
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addAndMakeVisible (randomColourButton);
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randomColourButton.onClick = [this] { randomColourButtonClicked(); };
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// lay out our components in a pseudo random grid
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Rectangle<int> area (0, 100, 150, 150);
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for (auto* comp : flashingComponents)
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{
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auto buttonArea = area.withSize (comp->getWidth(), comp->getHeight());
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buttonArea.translate (random.nextInt (area.getWidth() - comp->getWidth()),
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random.nextInt (area.getHeight() - comp->getHeight()));
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comp->setBounds (buttonArea);
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area.translate (area.getWidth(), 0);
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// if we go off the right start a new row
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if (area.getRight() > (800 - area.getWidth()))
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{
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area.translate (0, area.getWidth());
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area.setX (0);
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}
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}
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setSize (600, 600);
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}
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~TimersAndEventsDemo() override
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{
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for (auto* fc : flashingComponents)
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fc->removeChangeListener (this);
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}
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void paint (Graphics& g) override
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{
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g.fillAll (getUIColourIfAvailable (LookAndFeel_V4::ColourScheme::UIColour::windowBackground,
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Colours::darkgrey));
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}
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void paintOverChildren (Graphics& g) override
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{
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auto explanationArea = getLocalBounds().removeFromTop (100);
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AttributedString s;
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s.append ("Click on a circle to make it flash. When it has finished flashing it will send a message which causes the next circle to flash");
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s.append (newLine);
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s.append ("Click the \"Set Random Colour\" button to change the colour of one of the circles.");
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s.append (newLine);
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s.setFont (16.0f);
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s.setColour (getUIColourIfAvailable (LookAndFeel_V4::ColourScheme::UIColour::defaultText, Colours::lightgrey));
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s.draw (g, explanationArea.reduced (10).toFloat());
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}
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void resized() override
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{
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auto area = getLocalBounds().removeFromBottom (40);
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randomColourButton.setBounds (area.removeFromLeft (166) .reduced (8));
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stopButton .setBounds (area.removeFromRight (166).reduced (8));
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}
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private:
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enum { numFlashingComponents = 9 };
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OwnedArray<FlashingComponent> flashingComponents;
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TextButton randomColourButton { "Set Random Colour" },
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stopButton { "Stop" };
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Random random;
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void changeListenerCallback (ChangeBroadcaster* source) override
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{
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for (int i = 0; i < flashingComponents.size(); ++i)
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if (source == flashingComponents.getUnchecked (i))
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flashingComponents.getUnchecked ((i + 1) % flashingComponents.size())->startFlashing();
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}
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void randomColourButtonClicked()
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{
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// Here we post a new ColourMessage with a random colour to a random flashing component.
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// This will send a message to the component asynchronously and trigger its handleMessage callback
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flashingComponents.getUnchecked (random.nextInt (flashingComponents.size()))->postMessage (new ColourMessage (getRandomBrightColour()));
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}
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void stopButtonClicked()
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{
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for (auto* fc : flashingComponents)
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fc->stopFlashing();
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}
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JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (TimersAndEventsDemo)
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};
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