Class WindowUtils
Window.
 - Non-rectangular shape (bitmap mask, no antialiasing)
- Transparency (constant alpha applied to window contents or transparent background)
- Fully transparent window (the transparency of all painted pixels is applied to the window).
NOTE: Neither shaped windows nor transparency currently works with Java 1.4 under X11. This is at least partly due to 1.4 using multiple X11 windows for a single given Java window. It *might* be possible to remedy by applying the window region/transparency to all descendants, but I haven't tried it. In addition, windows must be both displayable and visible before the corresponding native Drawable may be obtained; in later Java versions, the window need only be displayable.
 NOTE: If you use setWindowMask(Window,Shape) and override Window.paint(Graphics) on OS X, you'll need to explicitly set the clip
 mask on the Graphics object with the window mask; only the
 content pane of the window and below have the window mask automatically
 applied.
 NOTE: On OSX, the property
 apple.awt.draggableWindowBackground is set automatically when
 a window's background color has an alpha component.  That property must be
 set to its final value before the heavyweight peer for the Window
 is created.  Once Component.addNotify() has been called on the
 component, causing creation of the heavyweight peer, changing this
 property has no effect.
- Author:
- Andreas "PAX" Lück, onkelpax-git[at]yahoo.de
- See Also:
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Nested Class SummaryNested ClassesModifier and TypeClassDescriptionstatic classWindow utilities with differing native implementations.protected static classThis can be installed over aJLayeredPanein order to listen for repaint requests.
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Field SummaryFields
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Constructor SummaryConstructors
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Method SummaryModifier and TypeMethodDescriptionstatic List<DesktopWindow>getAllWindows(boolean onlyVisibleWindows) Requests a list of all currently available Desktop windows.static GraphicsConfigurationReturns aGraphicsConfigurationcomptible with alpha compositing.static DimensiongetIconSize(WinDef.HICON hIcon) Detects the size of an icon.static StringDetects the full file path of the process associated with the specified window handle.static BufferedImagegetWindowIcon(WinDef.HWND hwnd) Obtains the set icon for the window associated with the specified window handle.static RectangleRequests the location and size of the window associated with the specified window handle.static StringgetWindowTitle(WinDef.HWND hwnd) Tries to obtain the Window's title which belongs to the specified window handle.static booleanIndicate a window can have a global alpha setting.static voidsetComponentMask(Component c, Shape mask) Applies the given mask to the given heavyweight component.static voidsetWindowAlpha(Window w, float alpha) Set the overall window transparency.static voidsetWindowMask(Window w, Shape mask) Applies the given mask to the given window.static voidsetWindowMask(Window w, Icon mask) Applies the given mask to the given window.static voidsetWindowTransparent(Window w, boolean transparent) Set the window to be transparent.
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Field Details- 
MASK_NONEUse this to clear a window mask.
 
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Constructor Details- 
WindowUtilspublic WindowUtils()
 
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Method Details- 
setWindowMaskApplies the given mask to the given window. Does nothing if the operation is not supported. The mask is treated as a bitmap and ignores transparency.
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setComponentMaskApplies the given mask to the given heavyweight component. Does nothing if the operation is not supported. The mask is treated as a bitmap and ignores transparency.
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setWindowMaskApplies the given mask to the given window. Does nothing if the operation is not supported. The mask is treated as a bitmap and ignores transparency.
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isWindowAlphaSupportedpublic static boolean isWindowAlphaSupported()Indicate a window can have a global alpha setting.
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getAlphaCompatibleGraphicsConfigurationReturns aGraphicsConfigurationcomptible with alpha compositing.
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setWindowAlphaSet the overall window transparency. An alpha of 1.0 is fully opaque, 0.0 fully transparent. The alpha level is applied equally to all window pixels.NOTE: Windows requires that sun.java2d.noddraw=truein order for alpha to work.NOTE: On OSX, the property apple.awt.draggableWindowBackgroundmust be set to its final value before the heavyweight peer for the Window is created. OnceComponent.addNotify()has been called on the component, causing creation of the heavyweight peer, changing this property has no effect.- See Also:
 
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setWindowTransparentSet the window to be transparent. Only explicitly painted pixels will be non-transparent. All pixels will be composited with whatever is under the window using their alpha values. On OSX, the propertyapple.awt.draggableWindowBackgroundmust be set to its final value before the heavyweight peer for the Window is created. OnceComponent.addNotify()has been called on the component, causing creation of the heavyweight peer, changing this property has no effect.- See Also:
 
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getWindowIconObtains the set icon for the window associated with the specified window handle.- Parameters:
- hwnd- The concerning window handle.
- Returns:
- Either the window's icon or nullif an error occurred.
 
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getIconSizeDetects the size of an icon.- Parameters:
- hIcon- The icon handle type.
- Returns:
- Either the requested icon's dimension or an Dimensioninstance of(0, 0).
 
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getAllWindowsRequests a list of all currently available Desktop windows.- Parameters:
- onlyVisibleWindows- Specifies whether only currently visible windows will be considered (- true). That are windows which are not minimized. The- WS_VISIBLEflag will be checked (see: User32.IsWindowVisible(HWND)).
- Returns:
- A list with all windows and some detailed information.
 
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getWindowTitleTries to obtain the Window's title which belongs to the specified window handle.- Parameters:
- hwnd- The concerning window handle.
- Returns:
- Either the title or an empty string of no title was found or an error occurred.
 
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getProcessFilePathDetects the full file path of the process associated with the specified window handle.- Parameters:
- hwnd- The concerning window handle for which the PE file path is required.
- Returns:
- The full file path of the PE file that is associated with the specified window handle.
 
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getWindowLocationAndSizeRequests the location and size of the window associated with the specified window handle.- Parameters:
- hwnd- The concerning window handle.
- Returns:
- The location and size of the window.
 
 
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