Hi Antonio,
Thanks a lot. This is really helpful.
Milind
On Thu, Jun 29, 2017 at 8:26 PM, Antonio Scuri <[email protected]>
wrote:
> BTW,
>
> I know that this is just an example, but if you are going to draw
> primitives in a canvas using elements as reference points, then I would
> suggest you to use the same coordinate system as the IupGLCanvasBox
> elements. For instance, using:
>
> gl.Ortho(0, width, 0, height, -1, 1)
>
> I attached a modified version of the example with this approach. Just to
> illustrate.
>
> Best,
> Scuri
>
>
> 2017-06-30 0:20 GMT-03:00 Antonio Scuri <[email protected]>:
>
>> 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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>>
>
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