/* ============================================================================== 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 dialog-box style window. This class is a convenient way of creating a DocumentWindow with a close button that can be triggered by pressing the escape key. Any of the methods available to a DocumentWindow or ResizableWindow are also available to this, so it can be made resizable, have a menu bar, etc. You can either override or use an instance of the DialogWindow class directly, or you can use a DialogWindow::LaunchOptions structure to quickly set up and launch a box containing a content component. If you use the class directly, you'll need to override the DocumentWindow::closeButtonPressed() method to handle the user clicking the close button - for more info, see the DocumentWindow help. @see DocumentWindow, ResizableWindow @tags{GUI} */ class JUCE_API DialogWindow : public DocumentWindow { public: //============================================================================== /** Creates a DialogWindow. @param name the name to give the component - this is also the title shown at the top of the window. To change this later, use setName() @param backgroundColour the colour to use for filling the window's background. @param escapeKeyTriggersCloseButton if true, then pressing the escape key will cause the close button to be triggered @param addToDesktop if true, the window will be automatically added to the desktop; if false, you can use it as a child component @param desktopScale specifies the scale to use when drawing the window. In a plugin, the host controls the scale used to render the plugin editor. You should query the editor scale with Component::getApproximateScaleFactorForComponent() and pass the result here. You can ignore this parameter in a standalone app */ DialogWindow (const String& name, Colour backgroundColour, bool escapeKeyTriggersCloseButton, bool addToDesktop = true, float desktopScale = 1.0f); /** Destructor. If a content component has been set with setContentOwned(), it will be deleted. */ ~DialogWindow() override; //============================================================================== /** This class defines a collection of settings to be used to open a DialogWindow. The easiest way to open a DialogWindow is to create yourself a LaunchOptions structure, initialise its fields with the appropriate details, and then call its launchAsync() method to launch the dialog. */ struct JUCE_API LaunchOptions { LaunchOptions() noexcept; /** The title to give the window. */ String dialogTitle; /** The background colour for the window. */ Colour dialogBackgroundColour = Colours::lightgrey; /** The content component to show in the window. This must not be null! Using an OptionalScopedPointer to hold this pointer lets you indicate whether you'd like the dialog to automatically delete the component when the dialog has terminated. */ OptionalScopedPointer content; /** If this is not a nullptr, it indicates a component that you'd like to position this dialog box in front of. See the DocumentWindow::centreAroundComponent() method for more info about this parameter. */ Component* componentToCentreAround = nullptr; /** If true, then the escape key will trigger the dialog's close button. */ bool escapeKeyTriggersCloseButton = true; /** If true, the dialog will use a native title bar. See TopLevelWindow::setUsingNativeTitleBar() */ bool useNativeTitleBar = true; /** If true, the window will be resizable. See ResizableWindow::setResizable() */ bool resizable = true; /** Indicates whether to use a border or corner resizer component. See ResizableWindow::setResizable() */ bool useBottomRightCornerResizer = false; /** Launches a new modal dialog window. This will create a dialog based on the settings in this structure, launch it modally, and return immediately. The window that is returned will be automatically deleted when the modal state is terminated. When the dialog's close button is clicked, it'll automatically terminate its modal state, but you can also do this programmatically by calling exitModalState (returnValue) on the DialogWindow. If your content component needs to find the dialog window that it is contained in, a quick trick is to do this: @code if (DialogWindow* dw = contentComponent->findParentComponentOfClass()) dw->exitModalState (1234); @endcode */ DialogWindow* launchAsync(); /** Creates a new DialogWindow instance with these settings. This method simply creates the window, it doesn't run it modally. In most cases you'll want to use launchAsync() or runModal() instead. */ DialogWindow* create(); #if JUCE_MODAL_LOOPS_PERMITTED /** Launches and runs the dialog modally, returning the status code that was used to terminate the modal loop. Note that running modal loops inline is a BAD technique. If possible, always use launchAsync() instead of this method. */ int runModal(); #endif JUCE_DECLARE_NON_COPYABLE (LaunchOptions) }; //============================================================================== /** Easy way of quickly showing a dialog box containing a given component. Note: This method has been superseded by the DialogWindow::LaunchOptions structure, which does the same job with some extra flexibility. The showDialog method is here for backwards compatibility, but please use DialogWindow::LaunchOptions in new code. This will open and display a DialogWindow containing a given component, making it modal, but returning immediately to allow the dialog to finish in its own time. If you want to block and run a modal loop until the dialog is dismissed, use showModalDialog() instead. To close the dialog programmatically, you should call exitModalState (returnValue) on the DialogWindow that is created. To find a pointer to this window from your contentComponent, you can do something like this: @code if (DialogWindow* dw = contentComponent->findParentComponentOfClass()) dw->exitModalState (1234); @endcode @param dialogTitle the dialog box's title @param contentComponent the content component for the dialog box. Make sure that this has been set to the size you want it to be before calling this method. The component won't be deleted by this call, so you can re-use it or delete it afterwards @param componentToCentreAround if this is not a nullptr, it indicates a component that you'd like to show this dialog box in front of. See the DocumentWindow::centreAroundComponent() method for more info on this parameter @param backgroundColour a colour to use for the dialog box's background colour @param escapeKeyTriggersCloseButton if true, then pressing the escape key will cause the close button to be triggered @param shouldBeResizable if true, the dialog window has either a resizable border, or a corner resizer @param useBottomRightCornerResizer if shouldBeResizable is true, this indicates whether to use a border or corner resizer component. See ResizableWindow::setResizable() */ static void showDialog (const String& dialogTitle, Component* contentComponent, Component* componentToCentreAround, Colour backgroundColour, bool escapeKeyTriggersCloseButton, bool shouldBeResizable = false, bool useBottomRightCornerResizer = false); #if JUCE_MODAL_LOOPS_PERMITTED /** Easy way of quickly showing a dialog box containing a given component. Note: This method has been superseded by the DialogWindow::LaunchOptions structure, which does the same job with some extra flexibility. The showDialog method is here for backwards compatibility, but please use DialogWindow::LaunchOptions in new code. This will open and display a DialogWindow containing a given component, returning when the user clicks its close button. It returns the value that was returned by the dialog box's runModalLoop() call. To close the dialog programmatically, you should call exitModalState (returnValue) on the DialogWindow that is created. To find a pointer to this window from your contentComponent, you can do something like this: @code if (DialogWindow* dw = contentComponent->findParentComponentOfClass()) dw->exitModalState (1234); @endcode @param dialogTitle the dialog box's title @param contentComponent the content component for the dialog box. Make sure that this has been set to the size you want it to be before calling this method. The component won't be deleted by this call, so you can re-use it or delete it afterwards @param componentToCentreAround if this is not a nullptr, it indicates a component that you'd like to show this dialog box in front of. See the DocumentWindow::centreAroundComponent() method for more info on this parameter @param backgroundColour a colour to use for the dialog box's background colour @param escapeKeyTriggersCloseButton if true, then pressing the escape key will cause the close button to be triggered @param shouldBeResizable if true, the dialog window has either a resizable border, or a corner resizer @param useBottomRightCornerResizer if shouldBeResizable is true, this indicates whether to use a border or corner resizer component. See ResizableWindow::setResizable() */ static int showModalDialog (const String& dialogTitle, Component* contentComponent, Component* componentToCentreAround, Colour backgroundColour, bool escapeKeyTriggersCloseButton, bool shouldBeResizable = false, bool useBottomRightCornerResizer = false); #endif /** Called when the escape key is pressed. This can be overridden to do things other than the default behaviour, which is to hide the window. Return true if the key has been used, or false if it was ignored. */ virtual bool escapeKeyPressed(); protected: //============================================================================== /** @internal */ void resized() override; /** @internal */ bool keyPressed (const KeyPress&) override; /** @internal */ float getDesktopScaleFactor() const override { return desktopScale * Desktop::getInstance().getGlobalScaleFactor(); } private: std::unique_ptr createAccessibilityHandler() override; float desktopScale = 1.0f; bool escapeKeyTriggersCloseButton; JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (DialogWindow) }; } // namespace juce