[DropMaster Support]

Glad you got things working the way you like. I’m creating a reply below anyway for future reference in case anyone else has similar questions.

Buttons and dragging. There are lots of different possibilities for starting a drag. TDMTextSource has a MouseButton property so the components know when to process a drop, and you can detect a drag with a non-standard button using the WinAPI DragDetectEx() instead of DragDetect(). Take a look at the Demos\Delphi\Feedback\MouseButton.dpr project and/or search for DragDetect() in the Demos folder to see examples.

Shift key. You can detect whether the shift key is down when you’re detecting a drag by calling the WinAPI like
aShiftKeyIsDown := GetAsyncKeyState(VK_LSHIFT) or GetAsyncKeyState(VK_RSHIFT);
which will be true if either the left or right shift key is down at the moment the function is called.

In terms of adding the extra data to a drag, you can either forgo the DonorComponent assignment and directly assign the desired content to the TDMTextSource.Text property just before calling TDMTextSource.Execute, or use a custom format instead of text. For the latter, see the Demos\Delphi\CustomFormats folder for examples.

• This reply was modified 6 years ago by DropMaster Support.
• This reply was modified 6 years ago by DropMaster Support.

[DropMaster Support]

That depends on the PDF viewer software you use. If your PDF viewer allows dragging a page then there ought to be a way to accept it in DropMaster. My advice is to build the FormatViewer demo that comes with DropMaster and see what happens if you attempt a drop into it. FormatViewer should list every data format present in a drag and it is the primary tool you need for figuring out how to use a new/non-standard drop source.

Hope this helps.

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