Widget Programming Tips

• How do I detect a double click on a button widget?
• How can I process keyboard events from within my widget program?
• How do I draw a rubberband box in a widget program?
• How do I draw a free-hand line in a draw widget window?
• How can I tell which button is currently selected in a set of exclusive buttons?
• How can I get the new viewport coordinates when the user scrolls my draw widget?
• My widget program produces the error: %XMANAGER: Caught unexpected error from
  client application. How can I get a more enlightened message?
• How can I remove the scroll bars from my draw widget window?
• How can I create a show progress indicator for a time-consuming operation?
• How do I get the current value of a droplist widget?
• Can you show me how to dynamically add menu items to my program?
• What's your opinion of the GUI Builder? Should I use it?
• Can you explain the difference between modal and blocking widgets?
• Can you explain the GROUP_LEADER, EVENT_PRO and JUST_REG keywords.
  I want to run multiple widget programs at the same time and I don't know how to set these keywords.
• How can I write a password widget that echos the password in asterisks?
• How can I change the maximum value of a slider widget after I have realized it?
• Alright, how do you do that resizeable graphics window trick?
• How do I get checkbox buttons (or radio buttons) instead of push-buttons in my GUI interface?
• How do I set the initial checkbox buttons (or radio buttons) when I create them?
• How can I get an error traceback in a widget program, and yet keep the program running?
• How do I get my widget buttons to all be the same size?
• Given a widget ID, how can I find the ID of the widget at the top of that widget's hierarchy?
• Is XManager obsolete in IDL 5.6?
• How do I write a pop-up dialog widget in IDL?
• Can you show me how to implement a cascading series of menu choices as pop-up windows?
• I can't work out how to put checkmarks next to menu items. Any ideas?
• How come LIST widgets (or DROPLIST widgets) don't have values?
• How can I make my widget buttons look depressed?
• Help! I can't get my double- precision values converted to strings properly.
• How can I take a snapshot of an entire widget application from within the program?
• What do I have to do to use the mouse wheel in UNIX widgets?
• How can I create a resizeable list widget?
• How can I identify base widget IDs from tab widget events?
• Can you show me how to make colored widget buttons?
• How can I find the size of a string I want to put in a text widget?
• Say, uh, are draw widget press and release values totally off the chart?
• Toward a theory of widget geometry.
• Is it possible to create a multi-line label widget?
• How can I run widget programs when stopped at a breakpoint?
• How do I determine the default widget font in IDL?
• How do I create that fancy frame with the label on it in IDL widgets?
• How do I add a new value to an editable combobox widget?
• Yikes! My widget program seems to have a homing instinct. It won't stay put.
• Can you show me how to display non-English text on a widget in IDL?
• How can I stop Dialog_Pickfile from clipping my file name?