Hi,
You set the frame position to be 10,10. That's where the 10 pixel offset
came from. Experiment to set it to 50,50 and you will see that difference
to increase even more.
So what's missing is to offset the desired point by the frame position.
For instance:
local frm_x,frm_y = gframe.position:match("(%d+),(%d+)")
local frm_w,frm_h = gframe.rastersize:match("(%d+)x(%d+)")
local cnv_w,cnv_h = cnv.rastersize:match("(%d+)x(%d+)")
-- calculate the bottom middle point
local x = frm_x + frm_w/2
local y = frm_y + frm_h
local cnvx = cnv_w/2
local cnvy = cnv_h/2
Best,
Scuri
2017-06-29 19:31 GMT-03:00 Milind Gupta <[email protected]>:
> So the main thing is I am trying to use the frame box as a box in a flow
> almost like a flowchart. So I want to connect lines from a frame box to
> some other point.
>
> On Thu, Jun 29, 2017 at 3:29 PM, Milind Gupta <[email protected]>
> wrote:
>
>> I have attached a sample code. This has a frame with just a label and 2
>> lines that are drawn from the center to the the bottom line. The red one
>> gets the bottom from rastersize while the blue one adds an offset of 10.
>>
>> On Thu, Jun 29, 2017 at 1:26 PM, Antonio Scuri <[email protected]>
>> wrote:
>>
>>> Hi,
>>>
>>> This is probably related to the space occupied by the TITLE area and
>>> in which callback you are using to draw. Can't tell you what's the best
>>> solution with just that information.
>>>
>>> To draw elements aligned with IUP elements inside a IupGLCanvasBox, I
>>> suggest you to use an IupGLSubCanvas element. You will be able to draw from
>>> 0 to rastersize in its GL_ACTION callback. Use the layout positioning to
>>> align the element inside the glframe.
>>>
>>> Best,
>>> Scuri
>>>
>>>
>>> 2017-06-29 17:08 GMT-03:00 Milind Gupta <[email protected]>:
>>>
>>>> Hi,
>>>> I am trying to draw a line from the mid point of the base of a
>>>> glframe. When I get the rastersize of the frame and use that to calculate
>>>> the midpoint of the base the point comes about 10px below the frame line.
>>>> How can I remove this margin so that rastersize gives me the dimension to
>>>> the frame line. In the x direction there does not seem to be any margin.
>>>> Or is there a way to accurately find out the margin below the
>>>> frame line and then offset my line coordinate by that margin and then touch
>>>> the frame line?
>>>>
>>>> Thanks,
>>>> Milind
>>>>
>>>>
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>>>
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>>
>
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