hook marquee events

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A marquee hook would be useful.

In a window hook function, the only event associated with drawing a marquee is the final mouseup, so I can't use a combination of mousedown and mousemoved events with getmarquee to track the drawing of a marquee. A marquee event that replaces the unreported mousemoved would work.

Any chance?

I do this after the mouseup event to reset marquee coordinates on a panel.

// image window hook function
Function Hf_imgTImageHook(iwH)      // WindowHookFunction
    STRUCT WMWinHookStruct &iwH
   
    variable hookResult = 0, ctab
    string wmode
   
    switch(iwH.eventCode)
        case 0:     // active
            wmode = GetUserData(k_imgDisplay,"","draw")
            // drawing mode active -- pass thru and do nothing here
            if (strlen(wmode) != 0)
                break
            endif
            hookResult = 1
            break
        case 2:     // graph being killed
            KillWindow/Z $k_histGraphs
            hookResult = 1
            break
        case 5:     // mouseup
            wmode = GetUserData(k_imgDisplay,"","draw")
            // drawing mode active -- acknowledge and do nothing further
            if (strlen(wmode) != 0)
                hookResult = 1
                break
            endif
            GetMarquee/W=$k_imgDisplay/Z
            // has a marquee -- force update to coordinate values
            if (v_flag)
                ResetMQCoordinates(force=1)
            endif
            hookResult = 1
            break
    endswitch
   
    return hookResult
end

Are you wanting to track the marquee dynamically. If so, is this not handled by setting a global flag that forces Igor to create globals that will track the marquee dynamically?

This is not to say that either a separate marquee hook function or an additional eventCode to track the marquee (e.g. case 88: marquee coordinates changed) would not be useful in its own right.

May 8, 2021 at 11:16 am - Permalink

Check the help for GetMarquee, and look at the V_marquee discussion under "Marquee Globals"

May 8, 2021 at 03:25 pm - Permalink

jjweimer wrote:

Are you wanting to track the marquee dynamically. If so, is this not handled by setting a global flag that forces Igor to create globals that will track the marquee dynamically?

Hmm, that sounds familiar. Yes, I was hoping to track dynamically. I already check for the mouseup to grab coordinates after drawing, that works fine.

 

May 8, 2021 at 03:26 pm - Permalink

Tony- I'd be interested in the use case for this.

The window hook doesn't get the mouse moved events during marquee drawing because our internal code is tracking the mouse moved events and not letting the hook function have them first. It could be awkward to be in the middle of tracking the mouse and have the hook function start interfering.

May 10, 2021 at 09:37 am - Permalink

Use case:

User interface for selecting a ROI from a 1D plotted trace. Click and drag is the most efficient way, and efficiency counts if the user is fiddling around and adjusting their choice. It would be nice if marquee left and right were displayed in real time. Not altogether necessary, but nice. I could perhaps use the hook function together with a modifier key to monitor the click-and-drag, and skip the marquee altogether. But I don't want to prevent the marquee from working for its usual UI roles, and the marquee is convenient for making a quick selection. And there are not many suitable modifier keys that aren't already used in a graph window. No big deal, and probably better not to give me the marquee event if i can use it to screw up something else.

As it is I have the marquee mouseup triggering some setvars, and the setvars can be adjusted to change the marquee. That works nicely.

May 11, 2021 at 01:32 am - Permalink