If I have a lot of images, I can drag the mouse to select multiple images, but this works only if you start selecting when the window is scrolled to the top. If I scroll the window down and try to multi-select with a mouse drag, the mouse drag starts to scroll the window instead of selecting.
Tested with both the Multi thumbnail demos along with setting the EnableMultiSelect option to true.
Note: I have been using the standard TListView and noticed a similar issue where if I start with the window scrolled down a bit and start drag selecting, it selects all the images and jump scrolls be me to the top. This is why I was looking at your TImageEnMView control.
Hmmm... not sure why you cannot reproduce it. I was using 7.0.1 and updated to 7.5 and maybe is a little worse I can't remember. Anyway, two issues:
1) If starting at the top row, when dragging the mouse starting on the right side to select images, it does not select the ones on the first row left side (it starts to but when moving the mouse to the next row below, they get unselected). Starting from the left side, it is fine. This is not the way the Windows File Explorer selects, so it is non-standard IMHO.
2) The real issue, if you scroll down the list of images and start to drag select, it is fine until you drag to the next row where instead of selecting it scrolls the window.
I don't see how to attach a file, but I've uploaded a video which is using your Thumbnail demo compiled with Delphi 2007 running on Windows 10 (not running under the IDE, but it doesn't matter in any case). There is no audio, but hopefully you'll see both issues: http://whispersolutions.com/downloads/ThumbnailMouseDragSelectProblem.mp4
HTTP Error 404.3 - Not Found The page you are requesting cannot be served because of the extension configuration. If the page is a script, add a handler. If the file should be downloaded, add a MIME map.
I am so hating HostGator about now. I ask them to fix a problem with our webstats, and they break our test server and for some unknown reason removed the MP4 mime type I had them add a year ago. I zipped it up so try this link: http://whispersolutions.com/downloads/ThumbnailMouseDragSelectProblem.zip
I tested with the Multi/Thumbnails demo (Thumbs.exe) on the video (after modifying the property to allow for multiple selection).
I also tried it with Multi/Thumbnail2 demo and shows the same issue.
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TImageEnMView multiselect mouse drag problem
Posted - Apr 02 2018 : 17:24:44
