Class_ScrollGUI - updated on 2015-03-13

[HiSoKa]

Really nice idea, I hadn't thought of it .
Thank you very much @lmstearn to point it out ..

[Stealthle]

So I'm using this for a bitmap editor I'm making,much like Paint so I'm using it for a picture control so I can edit the image while zoomed in. For zooming in I'm just adjust the picture control size increments of 1x,2x,3x,etc and am using GDI+ to edit pixels and reload the picture to the GUI so it's live editing but I haven't come up with a good way to determine what pixel of the image I have the mouse over relative to the actual image after zooming and scrolling.
Any ideas? Thank you

[william_ahk]

Perhaps add an option to register WM_MOUSEWHEEL for horizontal scrolling (without holding Shift)? In many cases there is only a horizontal scroll bar.

[lmstearn]

Perhaps add an option to register WM_MOUSEWHEEL for horizontal scrolling (without holding Shift)? In many cases there is only a horizontal scroll bar.

Not sure this can happen without an extra horizontal scroll wheel on the mouse.
It's possible to interchange the scrolling actions to the scroll messages so shift=>scroll affects the vertical and scroll affects the horizontal. In the case where no vertical bar exists, the only thing that comes to mind is something funky like resizing the vertical bar to equal length of the horizontal bar, and "hiding" it from view somewhere in the DC. A fair bit of dodgeree-doo required to make it work, if indeed at all.

[william_ahk]

Not sure this can happen without an extra horizontal scroll wheel on the mouse.

Well, I've already got it working by removing the Shift key check conditions.

[lmstearn]

Same here. Reverse the position of the numbers in

Code: Select all

GetKeyState("Shift") ? 0x114: 0x115, hWnd