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Intel corner
Custom Window Shape
Round windows in Windows.
Issue: 2.6 (July/August 2004)
Author: Christian Schmitz
Author Bio: Christian Schmitz is the creator of the Monkeybread Software REALbasic Plugins.
Article Description: No description available.
Article Length (in bytes): 11,443
Starting Page Number: 42
RBD Number: 2621
Resource File(s):
2621.sit Updated: Thursday, July 15, 2004 at 12:00 PM
Related Link(s): None
Known Limitations: None
Excerpt of article text...
What do we want to do?
The first part of the article round window. For this we will use a special class WinRegion to define a region. A region is basically something like a picture mask, but it is built using bitmap and/or vector data. We create such a region and then assign it to a normal REALbasic window.
The second part will improve this class to give you some more commands. For example you can add one region to another to create more complex regions.
Use the class WinRegion
The following code simply allocates a WinRegion object. An oval region is then created and the region is assigned to the window.
Sub Open()
dim r as WinRegion
r=new WinRegion
r.CreateOval(20,-20,200,200)
r.SetWindowRegion self
End Sub
To implement this functionality, we create a new REALbasic project and add a class named "WinRegion". We add a private property "handle as integer" to store the region reference.
Clean up: FreeHandle and the destructor
The first method for this class is the FreeHandle method which will free the handle as advertised. The Windows API contains a function called "DeleteObject" which can be used to free handles for graphical objects like pens, regions, and patterns. The function returns an integer where a value of 0 means failure.
...End of Excerpt. Please purchase the magazine to read the full article.
Article copyrighted by REALbasic Developer magazine. All rights reserved.
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