listing_12_7.c

来自「This source code has been tested under O」· C语言 代码 · 共 94 行

/***********************************************************************
**                                                                    **
**  listing_12_7.c                                                    **
**                                                                    **
**  Demonstration of pop-up menus.                                    **
**                                                                    **
***********************************************************************/


#include <Xm/BulletinB.h>
#include <Xm/RowColumn.h>
#include <Xm/Label.h>
#include <Xm/PushB.h>
#include <Xm/Separator.h>


void	InitPopup();			/* FORWARD Definitions	      */
void	PopPopup();


Widget	appshell,			/* Application Shell	      */
	the_bb,				/* The work area    */
        popup,				/* The pop-up menu pane	      */
        pop_lbl,			/* The pop-up's title  	      */
        pop_sep,			/* Seps title from choices    */
        pop_btn[6];                  	/* Choices on the pop-up      */


void main( argc, argv )
    int     argc;
    char    *argv[];
{
    appshell = XtInitialize( argv[0], "Listing_12_7", NULL, 0, &argc, argv );

    the_bb = XmCreateBulletinBoard( appshell, "TheBB", NULL, 0 );
    XtManageChild( the_bb );

    XtAddEventHandler( the_bb, ButtonPressMask, FALSE, PopPopup, NULL );

    InitPopup();

    XtRealizeWidget( appshell );
    XtMainLoop();
}


/***********************************************************************
**                                                                    **
**  InitPopup()                                                       **
**                                                                    **
**  Creates the pop-up menu pane and its children.                    **
**                                                                    **
***********************************************************************/

void	InitPopup()
{
    popup = XmCreatePopupMenu( the_bb, "Popup", NULL, 0 );

    pop_lbl = XmCreateLabel( popup, "Pop_Title", NULL, 0 );
    XtManageChild( pop_lbl );

    pop_sep = XmCreateSeparator( popup, "Pop_Sep", NULL, 0 );
    XtManageChild( pop_sep );

    pop_btn[0] = XmCreatePushButton( popup, "Pop_Black", NULL, 0 );
    pop_btn[1] = XmCreatePushButton( popup, "Pop_Gray",  NULL, 0 );
    pop_btn[2] = XmCreatePushButton( popup, "Pop_White", NULL, 0 );
    pop_btn[3] = XmCreatePushButton( popup, "Pop_Red",   NULL, 0 );
    pop_btn[4] = XmCreatePushButton( popup, "Pop_Green", NULL, 0 );
    pop_btn[5] = XmCreatePushButton( popup, "Pop_Blue",  NULL, 0 );
    XtManageChildren( pop_btn, 6 );
}


/***********************************************************************
**                                                                    **
**  PopPopup( w, client_data, event )                                 **
**                                                                    **
**  Button event handler. Manages popup on button #3.                 **
**                                                                    **
***********************************************************************/

void	PopPopup( w, client_data, event )
    Widget	    w;
    caddr_t	    client_data;
    XButtonEvent    *event;
{
    if (event->button != Button3)
	return;

    XmMenuPosition( popup, event );
    XtManageChild( popup );
}