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164 lines
6.5 KiB
164 lines
6.5 KiB
/*
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==============================================================================
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This file is part of the JUCE library.
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Copyright (c) 2013 - Raw Material Software Ltd.
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Permission is granted to use this software under the terms of either:
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a) the GPL v2 (or any later version)
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b) the Affero GPL v3
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Details of these licenses can be found at: www.gnu.org/licenses
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JUCE is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
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A PARTICULAR PURPOSE. See the GNU General Public License for more details.
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------------------------------------------------------------------------------
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To release a closed-source product which uses JUCE, commercial licenses are
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available: visit www.juce.com for more information.
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==============================================================================
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*/
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#ifndef JUCE_TOPLEVELWINDOW_H_INCLUDED
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#define JUCE_TOPLEVELWINDOW_H_INCLUDED
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//==============================================================================
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/**
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A base class for top-level windows.
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This class is used for components that are considered a major part of your
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application - e.g. ResizableWindow, DocumentWindow, DialogWindow, AlertWindow,
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etc. Things like menus that pop up briefly aren't derived from it.
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A TopLevelWindow is probably on the desktop, but this isn't mandatory - it
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could itself be the child of another component.
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The class manages a list of all instances of top-level windows that are in use,
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and each one is also given the concept of being "active". The active window is
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one that is actively being used by the user. This isn't quite the same as the
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component with the keyboard focus, because there may be a popup menu or other
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temporary window which gets keyboard focus while the active top level window is
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unchanged.
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A top-level window also has an optional drop-shadow.
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@see ResizableWindow, DocumentWindow, DialogWindow
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*/
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class JUCE_API TopLevelWindow : public Component
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{
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public:
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//==============================================================================
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/** Creates a TopLevelWindow.
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@param name the name to give the component
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@param addToDesktop if true, the window will be automatically added to the
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desktop; if false, you can use it as a child component
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*/
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TopLevelWindow (const String& name, bool addToDesktop);
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/** Destructor. */
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~TopLevelWindow();
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//==============================================================================
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/** True if this is currently the TopLevelWindow that is actively being used.
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This isn't quite the same as having keyboard focus, because the focus may be
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on a child component or a temporary pop-up menu, etc, while this window is
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still considered to be active.
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@see activeWindowStatusChanged
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*/
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bool isActiveWindow() const noexcept { return isCurrentlyActive; }
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//==============================================================================
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/** This will set the bounds of the window so that it's centred in front of another
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window.
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If your app has a few windows open and want to pop up a dialog box for one of
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them, you can use this to show it in front of the relevent parent window, which
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is a bit neater than just having it appear in the middle of the screen.
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If componentToCentreAround is 0, then the currently active TopLevelWindow will
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be used instead. If no window is focused, it'll just default to the middle of the
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screen.
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*/
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void centreAroundComponent (Component* componentToCentreAround,
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int width, int height);
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//==============================================================================
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/** Turns the drop-shadow on and off. */
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void setDropShadowEnabled (bool useShadow);
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/** True if drop-shadowing is enabled. */
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bool isDropShadowEnabled() const noexcept { return useDropShadow; }
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/** Sets whether an OS-native title bar will be used, or a Juce one.
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@see isUsingNativeTitleBar
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*/
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void setUsingNativeTitleBar (bool useNativeTitleBar);
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/** Returns true if the window is currently using an OS-native title bar.
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@see setUsingNativeTitleBar
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*/
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bool isUsingNativeTitleBar() const noexcept;
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//==============================================================================
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/** Returns the number of TopLevelWindow objects currently in use.
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@see getTopLevelWindow
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*/
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static int getNumTopLevelWindows() noexcept;
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/** Returns one of the TopLevelWindow objects currently in use.
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The index is 0 to (getNumTopLevelWindows() - 1).
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*/
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static TopLevelWindow* getTopLevelWindow (int index) noexcept;
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/** Returns the currently-active top level window.
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There might not be one, of course, so this can return nullptr.
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*/
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static TopLevelWindow* getActiveTopLevelWindow() noexcept;
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/** Adds the window to the desktop using the default flags. */
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void addToDesktop();
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//==============================================================================
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/** @internal */
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virtual void addToDesktop (int windowStyleFlags, void* nativeWindowToAttachTo = nullptr) override;
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protected:
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//==============================================================================
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/** This callback happens when this window becomes active or inactive.
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@see isActiveWindow
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*/
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virtual void activeWindowStatusChanged();
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//==============================================================================
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/** @internal */
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void focusOfChildComponentChanged (FocusChangeType) override;
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/** @internal */
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void parentHierarchyChanged() override;
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/** @internal */
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virtual int getDesktopWindowStyleFlags() const;
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/** @internal */
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void recreateDesktopWindow();
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/** @internal */
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void visibilityChanged() override;
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private:
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friend class TopLevelWindowManager;
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friend class ResizableWindow;
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bool useDropShadow, useNativeTitleBar, isCurrentlyActive;
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ScopedPointer<DropShadower> shadower;
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void setWindowActive (bool isNowActive);
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JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (TopLevelWindow)
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};
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#endif // JUCE_TOPLEVELWINDOW_H_INCLUDED
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