How to detect a mouse click (or mousedown) event on a simple dropdown combo (combobox with style=1)?
I am unable to see mouseclick or mousedown event handlers for combobox in my vb6 IDE.
My aim is to detect right click.
Thanks in advance.
If the events aren't exposed, you may need to subclass the control and handle the WM_RBUTTONDOWN message.
Related
I have an NSView subclass in which I need to detect left and right mouse down events. mouseDown: is working just fine, but rightMouseDown: doesn't fire until the mouse button has been released, at which point both the down and up methods are called in succession. How can I make the right mouse down event trigger its corresponding method immediately?
The problem was that I have a NSPanGestureRecognizer added to the NSView with its buttonMask set to 0x2 (right mouse button). If I remove or disable this gesture recogniser, it allows rightMouseDown: to be called when the right button is pressed down. I'm still trying to figure out why, but at least now I have a starting point.
When trying to implement the handling of SHIFT+MouseWheel events for a CListCtrl to scroll horizontally, I was surprised, that on SHIFT+MouseWheel_UP the CListCtrl item under the mouse cursor got selected, that the selection changed.
The WM_MOUSEWHEEL message turned into a LVN_ITEMCHANGED notification.
I tried to reproduce the behavior in a smaller C++ project and yes - SHIFT+MouseWheel_UP selected the item in the CListCtrl right undr the mouse cursor.
Does anybody knows this behavior or reasons for this behavior?
May eventually a style or an extended style influence this behavior?
Thanks in advance!
Is there any notification message for WinAPI combo box controls we can use to know when the current item is changed while moving the mouse pointer over the drop-down list box?
My expectation is that the CBN_SELCHANGE notification should work for the mouse too, but unfortunately it is sent only when we change the selection using the keyboard or click an item with the mouse.
Listen for WM_DRAWITEM in your WndProc, and use the DRAWITEMSTRUCT to determine the selection.
The standard sequence of events to trigger a mouse click in Windows is documented here:
MSDN
Essentially it is:
MouseDown event.
Click event.
MouseClick event.
MouseUp event.
However, I have a control which is altering the sequence of events by capturing events on its children (to implement dragging). That means that the full sequence might not execute, e.g. currently I have a button which sees a MouseDown event, but no MouseUp event when the mouse is clicked.
Therefore the question is, what actually triggers the click at a low-level? Does it need a MouseDown followed by a MouseUp. Will a MouseUp on its own be sufficient? Are there any other considerations?
When you push down the left mouse button mouse down event fires. If you then move the mouse over a label (while holding the mouse button down) mouse over event does not fire.
Is there any way to enable this events or fire them manualy or simulate them?
What you are actually doing is two separate events, one is a mouse down event as you have described and the other is a mouse drag.
If you want to simulate them, that you might have to consider using a mouse click to track the user's (x,y) location. Subsequently, if you want to "simulate" it you could do some computation and decide for yourself if it is indeed a mouse click or mouse drag event that has occurred.
Hope it helps :) Cheers!