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DlgTest.txt
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2001-06-28
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DlgTest v1.04
Description:
A component editor that allows testing of the TCommonDialog descendants
at design time. This allows you to set the varios options and then view
the results without having to compile and run your application. The name
"Component Editor" is a bit of a misnomer for this, but that's what it's
called. We add a menu item, 'Test Dialog', to the context menu (right
click) the displays the dialog, and add the same functionality for double
clicking on the component. If the TCommonDialog class had a pure virtual
method "Execute" that each descendant overrode like it should, this would
be much easier. Because Execute is not defined in the ancestor, we have
register for each component type we want to add this to instead of just
registering it for TCommonDialog. Beginning object oriented programmers
learn from this: Just because you can't see a need for it, doesn't mean
that there isn't one.
Update: Delphi 3 got it right, so we do it the easy way if we are compiling
undering it.
Contact Information:
Feel free to contact me if you have any questions, comments or suggestions
at bstowers@pobox.com.
The lateset version will always be available on the web at:
http://www.pobox.com/~bstowers/delphi/
Installation: Simply compile this into your component library (a package in
Delphi 3) as you would any component. Afterwards, you will have a new menu
item when you right click on any component that descends from TCommonDialog
(TOpenDialog, TColorDialog, etc).
C++Builder 5 and up:
* Add the unit to the design-time package of your choice.
* Select the package the component has been added to, and choose
Project | Edit Option Source to open the package options in the editor.
* In the entry for PFLAGS, add the "-LUvcl50" option. For example:
<PFLAGS value="-$YD -$W -$O -v -JPHNE -M -LUvcl50"/>
* Recompile the package.
* For Borland's official word on this situation, open the C++Builder help
file and search the index for "dsgnintf.dcu" and see the "Compiling
packages with DsgnIntf" section.
Delphi 6 and up:
* Add the unit to the design-time package of your choice.
* Add the DesignIDE package to the Requires list of the package into which
the component is being installed.
* Recompile the package.
* This is necessary because of changes to the design-time support units
introduced in Delphi 6. For complete information, see the Del6New.hlp
file in your Delphi 6 Help directory. In the index, search for
"upgrade issues" and in the resulting list of topics, select the
"DsgnIntf renamed and related changes" topic.
Known Issues:
* There are no known issues at this time.
Revision History:
1.04: + Updated for Delphi 6 compatibility. See updated install directions
above.
1.03: + Updated for C++Builder 5 compatibility.
1.02: + Updated for Delphi 3 compatibility. If using with Delphi 3, the
"Test" item will now show up on all TCommonDialog descendant
components because Borland finally added an abstract Execute
method to it.
1.01: + Changed 'AnsiString' to 'String'. Will now compile with no
changes under Delphi 1.x.
1.00: + Initial release