Smalltalk - Re: How to move an image (like an icon) quickly around the screen?

Re: How to move an image (like an icon) quickly around the screen?

Posted by Louis LaBrunda on Oct 10, 2016; 3:40pm
URL: https://forum.world.st/How-to-move-an-image-like-an-icon-quickly-around-the-screen-tp4917636p4918562.html

I take back what I said about the label always having a border. It seems the CwOverrideShell is what always has a border and it isn't windows fault.

The VA Smalltalk code that creates the popup tells windows to give it a border. I think this is a bug/feature and will have more to say about it in another thread.

For now I'm working on how to make the popup transparent. I can get the icon and the label it is in to be transparent but the underlying popup window/shell seems to have a background that isn't transparent. As always, I'm open to ideas.

Lou

On Tuesday, October 4, 2016 at 9:20:40 AM UTC-4, Louis LaBrunda wrote:

Well, I have solved the speed problem at the cost of the icon being painted in a rectangle with a border and losing the transparent part of the icon. I use a popup window to hold a label that displays the icon with code like this:

BombIcon := self bombIcon. BombPopup := CwOverrideShell createPopupShell: 'Popup Bomb' parent: Transcript mainWindow argBlock: [:w | w width: BombIcon width; height: BombIcon height]. cell := BombPopup createLabel: 'The Bomb' argBlock: [:w | w borderWidth: 0; labelType: CwConstants::XmICON; height: BombIcon height; width: BombIcon width. ]. cell labelIcon: BombIcon; manageChild. BombPopup centerOnScreen. BombPopup popup.

The label is a windows widget and always has a border even if border is set to 0. So, I need to replace the label with some other graphic than can display the icon the way I want. Hopefully that's possible. Again any ideas are very much appreciated.

Lou

On Friday, September 30, 2016 at 12:25:42 PM UTC-4, Louis LaBrunda wrote:
Hi Guys and Gals,

Does anyone have any hints as to moving an image like an icon around the screen? I can do it but refreshing the screen under the image as it moves is very slow. I would also like the transparency area of the image to be respected. Any ideas are very much appreciated, thanks in advance.

Lou

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