Hi Antonio,
Is it possible that I just use the Canvas Draw library to draw on
the glcanvasbox?
Milind
On Mon, Jul 3, 2017 at 11:57 PM, Milind Gupta <[email protected]>
wrote:
> 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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