mephdbo%prism@gatech.edu (d. majumder) (08/05/89)
I had a question about using popup menus while processing button events for a canvas. I have to popup certain menus when buttons are clicked on certain locations of canvas. Now I have scrollbars with the canvas. If the canvas is unscrolled then menu pops up right where the mouse button is pressed. But if the canvas has been scolled away from zero position then the menu pops at weird places, like one corner of the entire screen. Any idea about how to prevent that. Is there any MENU_ attributes to explicitly specify the menu's location. ThankYou deeptendu
chuck@trantor.harris-atd.com (Chuck Musciano) (08/22/89)
> Now I have scrollbars with the canvas. If > the canvas is unscrolled then menu pops up right where the mouse button is > pressed. But if the canvas has been scolled away from zero position then > the menu pops at weird places, like one corner of the entire screen. When you call menu_show(), it needs the event which initiated the request and the window it occured in. I believe the menu package uses this event to determine where the menu will be displayed, and which button up event signifies a selection in the menu. If you have a scrolling canvas, the event coordinate space has been translated by your scrolling, and this probably confuses the menu package. I believe there is a routine which translates from canvas to world coordinates, which you might want to use to adjust the event location before calling menu_show(). Chuck Musciano ARPA : chuck@trantor.harris-atd.com Harris Corporation Usenet: ...!uunet!x102a!trantor!chuck PO Box 37, MS 3A/1912 AT&T : (407) 727-6131 Melbourne, FL 32902 FAX : (407) 727-{5118,5227,4004} Gee, Beaver, everything's that fun can get you in trouble. Haven't you learned that yet? --Gilbert