/* ============================================================================== This file is part of the JUCE library. Copyright (c) 2020 - Raw Material Software Limited JUCE is an open source library subject to commercial or open-source licensing. By using JUCE, you agree to the terms of both the JUCE 6 End-User License Agreement and JUCE Privacy Policy (both effective as of the 16th June 2020). End User License Agreement: www.juce.com/juce-6-licence Privacy Policy: www.juce.com/juce-privacy-policy Or: You may also use this code under the terms of the GPL v3 (see www.gnu.org/licenses). JUCE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL WARRANTIES, WHETHER EXPRESSED OR IMPLIED, INCLUDING MERCHANTABILITY AND FITNESS FOR PURPOSE, ARE DISCLAIMED. ============================================================================== */ namespace juce { //============================================================================== /** A box with a small arrow that can be used as a temporary pop-up window to show extra controls when a button or other component is clicked. Using one of these is similar to having a popup menu attached to a button or other component - but it looks fancier, and has an arrow that can indicate the object that it applies to. The class works best when shown modally, but obviously running modal loops is evil and must never be done, so the launchAsynchronously method is provided as a handy way of launching an instance of a CallOutBox and automatically managing its lifetime, e.g. @code void mouseUp (const MouseEvent&) { auto content = std::make_unique(); content->setSize (300, 300); auto& myBox = CallOutBox::launchAsynchronously (std::move (content), getScreenBounds(), nullptr); } @endcode The call-out will resize and position itself when the content changes size. @tags{GUI} */ class JUCE_API CallOutBox : public Component, private Timer { public: //============================================================================== /** Creates a CallOutBox. @param contentComponent the component to display inside the call-out. This should already have a size set (although the call-out will also update itself when the component's size is changed later). Obviously this component must not be deleted until the call-out box has been deleted. @param areaToPointTo the area that the call-out's arrow should point towards. If a parentComponent is supplied, then this is relative to that parent; otherwise, it's a global screen coord. @param parentComponent if not a nullptr, this is the component to add the call-out to. If this is a nullptr, the call-out will be added to the desktop. */ CallOutBox (Component& contentComponent, Rectangle areaToPointTo, Component* parentComponent); //============================================================================== /** Changes the base width of the arrow. */ void setArrowSize (float newSize); /** Updates the position and size of the box. You shouldn't normally need to call this, unless you need more precise control over the layout. @param newAreaToPointTo the rectangle to make the box's arrow point to @param newAreaToFitIn the area within which the box's position should be constrained */ void updatePosition (const Rectangle& newAreaToPointTo, const Rectangle& newAreaToFitIn); /** This will launch a callout box containing the given content, pointing to the specified target component. This method will create and display a callout, returning immediately, after which the box will continue to run modally until the user clicks on some other component, at which point it will be dismissed and deleted automatically. It returns a reference to the newly-created box so that you can customise it, but don't keep a pointer to it, as it'll be deleted at some point when it gets closed. @param contentComponent the component to display inside the call-out. This should already have a size set (although the call-out will also update itself when the component's size is changed later). @param areaToPointTo the area that the call-out's arrow should point towards. If a parentComponent is supplied, then this is relative to that parent; otherwise, it's a global screen coord. @param parentComponent if not a nullptr, this is the component to add the call-out to. If this is a nullptr, the call-out will be added to the desktop. @param dismissIfBackgrounded If this is true, the call-out will be dismissed if we are no longer the foreground app. */ static CallOutBox& launchAsynchronously (std::unique_ptr contentComponent, Rectangle areaToPointTo, Component* parentComponent, bool dismissIfBackgrounded=true); /** Posts a message which will dismiss the callout box asynchronously. NB: it's safe to call this method from any thread. */ void dismiss(); /** Determines whether the mouse events for clicks outside the calloutbox are consumed, or allowed to arrive at the other component that they were aimed at. By default this is false, so that when you click on something outside the calloutbox, that event will also be sent to the component that was clicked on. If you set it to true, then the first click will always just dismiss the box and not be sent to anything else. */ void setDismissalMouseClicksAreAlwaysConsumed (bool shouldAlwaysBeConsumed) noexcept; //============================================================================== /** This abstract base class is implemented by LookAndFeel classes. */ struct JUCE_API LookAndFeelMethods { virtual ~LookAndFeelMethods() = default; virtual void drawCallOutBoxBackground (CallOutBox&, Graphics&, const Path&, Image&) = 0; virtual int getCallOutBoxBorderSize (const CallOutBox&) = 0; virtual float getCallOutBoxCornerSize (const CallOutBox&) = 0; }; //============================================================================== /** @internal */ void paint (Graphics&) override; /** @internal */ void resized() override; /** @internal */ void moved() override; /** @internal */ void childBoundsChanged (Component*) override; /** @internal */ bool hitTest (int x, int y) override; /** @internal */ void inputAttemptWhenModal() override; /** @internal */ bool keyPressed (const KeyPress&) override; /** @internal */ void handleCommandMessage (int) override; /** @internal */ int getBorderSize() const noexcept; /** @internal */ void lookAndFeelChanged() override; private: //============================================================================== Component& content; Path outline; Point targetPoint; Rectangle availableArea, targetArea; Image background; float arrowSize = 16.0f; bool dismissalMouseClicksAreAlwaysConsumed = false; Time creationTime; std::unique_ptr createAccessibilityHandler() override; void refreshPath(); void timerCallback() override; JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (CallOutBox) }; } // namespace juce