ShapedWindow Class Reference

Inherits Window.

List of all members.

Public Member Functions
	ShapedWindow (int W, int H, const char *l=0)
	ShapedWindow (int X, int Y, int W, int H, const char *l=0)
void	shape (xbmImage *b)
void	shape (xbmImage &b)
Protected Member Functions
virtual void	draw ()
Protected Attributes
xbmImage *	shape_
int	lw
int	lh
int	changed

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Detailed Description

This window's shape is clipped to an area defined by the alpha from an Image object. Current implementation insists that this be an xbmImage, which limits you to 1-bit alpha which must be supplied by the program. It should not be hard to modify this on newer systems to accept an arbitrary Image.

The layout and widgets inside are unaware of the mask shape, and most will act as though the bounding box is available to them. Therefore this window type is usally sublassed or occupied by a single widget.

If the window will be short-lived and does not have to move, you may be much better off using an MenuWindow. This is a normal window but with no border and no pixels are changed unless you draw into them. Thus you can get arbitrary shapes by the simple expediency of not drawing where it should be "transparent".

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Member Function Documentation

void ShapedWindow::shape (  xbmImage *  b  )  [inline]

The alpha channel of the supplied image is used as the shape of the window. A pointer to the image is stored, so it must remain in existence until shape() is called again or the ShapedWindow is destroyed. If you want your window to resize you should subclass and make a layout() method that draws a new image and calls shape().

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The documentation for this class was generated from the following files:

• fltk/ShapedWindow.h
• src/ShapedWindow.cxx

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