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Select or Crop tool for user interaction

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T O P I C R E V I E W
AdrianKnowles	Posted - Sep 06 2023 : 10:17:10 Hi there, I've a small project where I'm considering using select tool or the crop tool. The user has to simply move/resize the rectangle on an image. There are certain criteria on how they interact. The criteria are A rectangle is displayed on the image (generated by crop or select tool I'm thinking) The user can interact with the rectangle via 4 grab handles at the corners The user can move the rectangle up or down but not left to right The user can alter the rectangle height but not the width The user cannot rotate the rectangle. Playing with crop tool then - I dont see a way to limit the movement of the rectangle. - I can lock width. - I dont see how to disallow rotation. - Using ImageEnView1.SetSelectionGripStyle(clPurple, clwhite,bsSolid, 16,false, iegsCircle); then using miSelect the grip handle in the middle of the lines are not drawn, expected behavior In miCrop they are drawn (regardless of if TRUE or FALSE), Any insights appreciated. Thanks, Adrian
2 L A T E S T R E P L I E S (Newest First)
xequte	Posted - Sep 07 2023 : 19:34:56 Hi Adrian If you are just looking to create a display prototype (without long-term maintenance concerns) then another option would be to copy the entire TIECropToolInteraction class to a local unit, rename the class and then add it to TImageEnView.UserInteractions: fMyCropToolInteraction := TMyCropToolInteraction.Create(ImageEnView1); ImageEnView1.UserInteractions.Add( fMyCropToolInteraction ); fMyCropToolInteraction.Enabled := true; That way you could manipulate the functionality and styling of the crop UI as much as you need. Nigel Xequte Software www.imageen.com
xequte	Posted - Sep 07 2023 : 02:31:33 Hi Adrian With regard to your queries: - I dont see a way to limit the movement of the rectangle There is not a good way to do this other than to fudge the CropTool.BitmapPolygon in the MouseMove event. https://www.imageen.com/help/TIECropToolInteraction.BitmapPolygon.html - I dont see how to disallow rotation ImageEnView1.CropTool.Options := ImageEnView1.CropTool.Options - [ iecoAllowRotating ]; https://www.imageen.com/help/TIECropToolInteraction.Options.html - The grip handle in the middle of the lines are not drawn Email me for the latest beta that fixes this But given the extent of the styling and manipulation changes you are looking at (the ones you emailed me about), I would be tempted just to create my own TIEUserInteraction. https://www.imageen.com/help/TIEUserInteraction.html It can be complex, but it gives you much more access to the internal functioning of ImageEnView. Here is an example: attach/xequte/20239723121_CustomUserInteraction.zip 23.6 KB Nigel Xequte Software www.imageen.com