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- Bitmapped Button
-
- BITBTN.DLL allows your applications to have bitmapped buttons
- similar to the ones found in Turbo Pascal Integrated Development
- Environment (TPW.EXE). Bitmapped buttons are direct replacements
- to standard Windows push buttons.
-
- A demo program, BITBNAPP.PAS shows how to use this BITBTN.DLL.
-
- Here is a summary of how to use a bitmapped button:
-
- Using an .RC file
- Replace the class "Button" with "BitButton" for any push
- buttons that have an ID code of idOk, idCancel, idYes, or
- idNo.
-
- Using the Whitewater Resource Toolkit
- Create a custom control with the class "BitButton" and give
- it the ID of idOk (1), idCancel (2), idYes (6) or idNo (7).
- To make a bit button the default, check the "Bit 0" control
- in the style dialog.
-
- Using Object Windows (non-template dialog)
- Create an object type like the following:
-
- PBitButton = ^TBitButton;
- TBitButton = object(TButton)
- constructor Init(AParent: PWindowsObject; AId, X, Y: Integer;
- Default: Boolean);
- function GetClassName: PChar;
- end;
- .
- .
- .
- constructor TBitButton.Init(AParent: PWindowsObject;
- AId, X, Y: Integer; Default: Boolean);
- begin
- TButton.Init(AParent, AId, X, Y, 0, 0, Default);
- end;
-
- function TBitButton.GetClassName: PChar;
- begin
- GetClassName := 'BitButton';
- end;
-
- This class also allows a bitmapped button to be placed in a
- window:
-
- Win := New(PWindow, Init(@Self, 'My Window'));
- Btn := New(PBitButton, Init(Win, idOk, 50, 50, False));
-
- If you wish to attach an object to the button, attach a
- TButton object to it. For example:
-
- D := New(PDialog, Init(nil, 'My Dialog'));
- C := New(PButton, InitResource(D, idOk));
- Application^.ExecDialog(D);
-
-
-
- Custom Bitmaps
- --------------
- The BITBTN.DLL calculates the bitmap to use by using the ID of
- the button. If you wish to create your own bitmaps for buttons,
- you need to create a least three bitmaps: button up, button up
- with focus, button down with focus. You'll need additional copies
- of these for each video adapter you wish to support (VGA, EGA,
- Herc, CGA, etc.). Examine the
-
- View BITBTN.RES using the Whitewater Resource Toolkit for an
- example of all the bitmaps. (Note: a button cannot be pressed
- down without the focus.) The bitmap numbers are calculated as
- follows,
-
- VGA EGA
- Up w/o focus 1000 + ID 2000 + ID
- Down /w focus 3000 + ID 4000 + ID
- Up /w focus 5000 + ID 6000 + ID
-
- If the ID for a bit mapped button does not have all the bitmappes
- associated to it, it will not opperate properly. Once the bitmaps
- are created they need to be added to the BITBTN.DLL resource.
- This can be done using the Whitewater Resource Toolkit.