用鼠标在图片框内移动图片

Question

I want to be able to drag around a 100% zoomed picture in a picturebox: http://spunit.tk/x/dragpic1.png .

I want it to work exactly like the Windows Photo Viewer: http://spunit.tk/x/dragpic2.png .

How is this possible?

Answer 1

I believe you need to maintain the coordinates of that picturebox, also set its view style to full-image, without any stretching.

Then, you will need three mouse events: mouse down, mouse up and mouse move, where you can get the mouse coordinates and capture or release mouse to translate the picture box according to mouse delta translation.