Hi Antonio,
I think I did not understand the methodology you described in
the previous email. I tried the following program:
--IupDialog Example in IupLua
--Creates a simple dialog.
require( "iuplua" )
cv = iup.canvas {size="300x5", xmin=0, xmax=99, posx=0, dx=10}
vbox = iup.scrollbox{
iup.cbox{
iup.vbox{
cv,
iup.text{size = "300x100", expand="YES",
value="I ignore the 'g' key!", border="YES"}
}
}
}
dlg = iup.dialog{vbox; title="Dialog", size="100x100"}
dlg:show()
function cv:motion_cb(x, y, r)
print(x, y, r)
end
if (iup.MainLoopLevel()==0) then
iup.MainLoop()
end
The canvas motion_cb is only called when the mouse moves over the canvas. I
cannot mouse motion when it is over the text?
Thanks,
Milind
On Tue, Aug 19, 2014 at 6:53 AM, Antonio Scuri <[email protected]>
wrote:
> Hi,
>
> What I suggest does not need to use CD to draw on the canvas. The idea is
> to use the canvas just to handle mouse messages, and use BGCOLOR to set a
> background color for the handler.
>
> Something like this:
>
> IupCbox(
> IupVbox(
> IupCanvas(NULL),
> IupText(NULL),
> NULL),
> NULL);
>
> If the cbox is not occupying the whole dialog then you can place it inside
> a IupFrame or a IupBackgroundBox, so you can set the background to white.
>
> Then set BGCOLOR of the IupCanvas to something different then white to use
> it as a handler, to move the vbox around the cbox.
>
> You must set CX and CY on the vbox so it will be positioned inside the
> cbox.
>
> Then implement the button_cb and motion_cb callbacks of the canvas, and
> use the drag delta of the canvas to change cx and cy. Take a look at the
> source code of the IupSbox or the IupSplit that both use this same approach
> to implement a moving handler.
>
> Best,
> Scuri
>
>
>
>
>
> On Sat, Aug 16, 2014 at 12:51 PM, Karagy <[email protected]> wrote:
>
>> I ran this example using iuplua5.1.exe version 3.11.
>>
>> 8/16/2014 18:16, Milind Gupta пишет:
>> > Hi Karagy,
>> > Thanks for looking at it. I tried running the file you send
>> but I
>> > get the following error:
>> >
>> > lua: cd_buttons.wlua:112: attempt to call field 'backgroundbox' (a nil
>> > value)
>> > stack traceback:
>> > cd_buttons.wlua:112: in main chunk
>> > [C]: ?
>> >
>>
>>
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