Steve Maughan

Has anyone had any success using Direct2D with multiple threads (i.e. multiple threads attempting to draw to the canvas at the same time)? It seems possible according to this link: https://docs.microsoft.com/en-us/windows/desktop/direct2d/multi-threaded-direct2d-apps But I can't find anything Delphi specific information. Any links or sample code appreciated. Thanks - Steve

Thanks - it's news to me!

There are quite a few Excel components available but I can't find any component to generate a PowerPoint presentation file. I realize I can possibly do this via OLE automation but that seems a little "flaky" to me. Does anyone know of a such PowerPoint component? Thanks, Steve

It's one of Joe Hecht's sites. He has a few and they all look the same. I gave him some similar honest feedback over on Google+ a few years' ago. He agreed, but nothing seems to have changed. It's a pity since I'm sure the components are decent. It would take no more than two days to replace these sites with a good WordPress theme.

Interesting!! I'll take a closer look. Thanks, Steve

I'm looking to implement high-definition printing and exporting for our mapping application. I'm planning to do this by creating a PDF. The solution will need to be able to create PDFs with custom polygons at a desired resolution. I've done a brief search and Gnostice's eDocEngine seems to fit the bill. Before I dive in I thought I'd ask if anyone had any other suggestions or any feedback about Gnostice's solution, Thanks, Steve

CartoVCL looks interesting but hasn't been updated since 2015. Abandonware regards, Steve

Anders - Awesome - thanks!

Thanks Anders. This is really helpful. Can I ask, what is the resource editor you're using in the screenshot? Steve

The way Delphi handles application icons seems to be terrible. Here's what happened. We have a new icon for our application. I managed to delete the old icon and all *.res file and update it with a new icon. Then suddenly the application is using the wrong icon in the main form. I've repeated the icon update process once again and now I seem to have messed things up. I now have the default icon as the application icon. OK - rant over, now for my questions: Is there an approved step-by-step process for changing a Delphi application's icon? How do I determine which size icon is used for the main form. Is it the 16x16 or 24x24 version of the main icon? Thanks, Steve

Thanks Peter!

Hi Attila, Thanks! Yes - I managed to get it working using a similar technique. I set a flag in the DblClick event and then sent a message to clear the flag. Steve

Looks like I haven't figured it out at all. It seems much more complex. Here's the order of events: OnMouseDown (processed with no problem) OnMouseUp (processed with no problem) OnDblClick - I'm showing a form for the user at this point. The GUI is recording the mousemove actions and generating OnMouseMove messages OnMouseDown - the second OnMouseDown of the double click, which can be ignored using a flag OnMouseUp - the second OnMouseUp of the double click, which can be ignored using a flag, and the fag can be reset Multiple OnMouseMove - then all of the OnMouseMove messages that were generated while the form was showing are now processed How do I either ensure the OnMouseMove messages aren't generated when the form is shown, or how do I remove them from the message queue? Here's a short video that shows the behavior: All help appreciate! Thanks, Steve

I figured it out. Set a flag on the DblClick event, exit out of the OnMouseDown if the flag is set, then do the same for OnMouseUp but also reset the flag.

I have a TPaintBox where I normally process OnMouseDown, OnMouseMove and OnMouseUp events. I'd like to perform an action using the DoubleClick even. It seems that when the user double clicks the order of events is as follows: OnMouseDown OnMouseUp OnDblClick OnMouseDown OnMouseUp I'd like to cancel / "eat" the second OnMouseDown and OnMouseUp events. How can I do this? Setting them to "nil" doesn't seem to work. Thanks - Steve