Not Sure How to Do This.

[Steve Gill]

Hi Ray,

I’ve tried implementing this using DropMaster, which I just purchased, but can’t quite work out how to do it.

Firstly, I would like to drag when the user holds down the <shift> key and the left mouse button, not just the left mouse button.

The second part is, I want to drag from a grid row in one application to a grid in another application. On the drop, the row will be added to the grid in the second application by passing it to a method that actually sends it to a database and then refreshes the grid.

Here’s the difficult part I can’t work out. I don’t actually want to copy the text from the grid row because it doesn’t contain all of the information I need. So what I want to do is copy additional information that’s not in the grid row. Now that’s easy to lookup but I’m not sure how to add it to the copied text.

Thanks.

Regards,

Steve

[Steve Gill]

Hi Ray,

Actually I think I’ve worked out the second part.

Regards,

Steve

[Steve Gill]

Hi Ray,

I should explain why I want to use the <shift> key with the left mouse button. I’m using a non-data aware grid that allows multiple rows to be selected. However, if I use drag and drop with the grid just using the left mouse button it causes issues with the multiple selection.

Or I guess I could just use the right mouse button, as long as that doesn’t interfere with the popup menu. I’ll give it a try.

Regards,

Steve

[Steve Gill]

Hi Ray,

I tried using the right mouse button but the popup menu interferes with the drag process. I don’t really want to use the centre mouse button as I don’t know how many users have 3 button mice.

Regards,

Steve

[Ray Konopka]

Hi Steve,
I’ll have Jim, who is the architect of DropMaster, respond to your questions.

Ray

[Steve Gill]

Hi Ray,

Thanks for the reply. It’s ok now. I worked out how to do it using <shift> and right mouse button.

Regards,

Steve

[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.

[Author]

Posts