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- ~4Dgifts/toolbox/src/exampleCode/X/XtAppInitwIcon README
-
-
- /*******************************************************************/
- /* XtAppInitializeWithIcon DESCRIPTION */
- /* Date: Mon Jul 12 11:56:51 1993 */
- /* Author: Chris Carlson */
- /*******************************************************************/
-
- This directory contains the source code to a function that is the same
- as XtAppInitialize except that it allows the application an
- opportunity to generate an icon window for the top-level shell that is
- a visual other than the default 2-color visual. According to the
- documentation for creating icon windows, it must have the same visual
- type as the root window.
-
- REQUIREMENTS
- ------------
-
- Currently, this has only been tested to work under IRIX 4.0.5.
-
- MAKE
- ----
-
- To make everything, including the testicon program, enter the
- following command:
-
- make testicon
-
- To make just the XtAppInitializeWithIcon function, enter the following
- command:
-
- make
-
- USAGE
- -----
-
- Prototype:
- Widget XtAppInitializeWithIcon (XtAppContext *context,
- String class,
- XrmOptionDescRec *options,
- Cardinal num_options,
- Cardinal *argc,
- String *argv,
- String *fallback,
- ArgList args,
- Cardinal num_args,
- makeIcon func_name);
-
- Window (*makeIcon) (Display *dpy,
- Cardinal *argc,
- String *argv);
-
- Parameters:
- XtAppInitializeWithIcon:
- All of the parameters are identical to the
- XtAppInitialize function except 'func_name'. This is
- a pointer to a function which will be called at the
- appropriate time in the initialization process to
- create the icon window.
-
- makeIcon:
- This is a function provided by the application to
- create the icon window.
-
- dpy Display returned by XtOpenDisplay.
- argc The same argc value provided by the application
- to XtAppInitializeWithIcon.
- argv The same argv value provided by the application
- to XtAppInitializeWithIcon.
-
- Return value:
- Window ID of window created to be the icon.
-
- DEMO PROGRAM
- ------------
-
- The testicon program that is also provided demonstrates how to use
- this new function. When compiled, the program can be made to print
- various debug information by setting bit patterns in the DEBUG symbol.
- These bits can be OR'd together to enable multiple debug output.
-
- VALUE DEBUG OUTPUT
- ----- ------------
- 0x0001 Print window IDs that are created.
- 0x0002 Print events that are sent to the icon window.
- 0x0004 Print information about colors allocated.
- 0x0008 Print information about the sizes of icons that are
- available from the window manager.
-
- Basically, all the testicon program does is create a simple window
- with a label widget in it. It serves no purpose except to create an
- icon window that is using the same visual as the root window.
-
- When this simple window is lowered to an icon, the icon should appear
- as a blue background with a yellow box in it. This proves that the
- icon window is using a color visual.
-
- If the program was compiled with (DEBUG & 2) != 0, then all events
- that are sent to the icon will be printed to stdout. This can be
- useful in finding out what events need to be processed and which are
- actually available to the icon window for the application to process.
-
- MORE WORK REQUIRED
- ------------------
-
- 1. One thought would be to make the function actually create the
- window for the application. The problem with this is that there
- are a number of variables that need to be considered when creating
- the icon window that the application needs to decide on. For
- example, the icon size, window attributes, events to process and
- background color. This might be resolved with suggestion #2 below.
-
- 2. Have the icon window be a widget and have XtAppInitializeWithIcon
- return a widget through one of the passed parameters. Then the
- specifics can be set through resources.
-