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Home » U++ Library support » Draw, Display, Images, Bitmaps, Icons » How to Draw a couple of lines over an ArrayCtrl
| How to Draw a couple of lines over an ArrayCtrl [message #4130] |
Mon, 24 July 2006 05:23  |
Ordog
Messages: 13
Registered: July 2006
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Promising Member |
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At a button triggered situation during runtime id like to Draw some Lines forming a graph over an ArrayCtrl.
From other posts in this forum i assume that can be done.
Im assuming that when i omit the DrawRect(rectwithsizeofwindow, color) that is used in the examples paint method that gives me a transparent "canvas" over my mainwindow.
My question now is how do i accomplish that?
First i need a Drawing overlaying my arrayCtrl.
so my headerfile holds
From this point im a bit lost in the black magic done by the Draw package 
So what exactly does the Paint() method ?
I assume it holds initial values for the canvas. So i defined my Paint method as follows:
void myguiclass::Paint(Draw& w) {
w.DrawDrawing(8, 90, 600, 460, dw);
}
which is (startx, starty, widthx, widthy, thedrawing)
now i got the canvas positioned over my ArrayCtrl... i guess.
Within my triggered function to draw the graph i introduce the drawing by using
where the arguments correlate with the size of my canvas.
from here on i should be able to use
w.DrawLine(int x1¸ int y1¸ int x2¸ int y2¸ int width = 0¸ Color color = SBlack)(
to form my graph linebyline from the coordinates extracted from my dataholding structure and apply the changes by using
right?
Meanwhile i implemented the above and surprisingly (for me ^^) it compiles.
The Applications Gui got some artifacts though, e.g.
-no background of the main window
So i put in the white rectangle of the example and it shows that the canvas is behind the widgets.
When i trigger the function that initializes the DrawingDraw and uses DrawLine the line is drawn but behind the widgets as expected.
Before i tinker around with this id be pleased if somebody could point me into the right direction 
PS: im using a layoutfile can i represent the drawing there somehow? should i use another layout when triggering the draw process?
PPS: i find it a bit confusing that 0,0 is at the upper left corner (i supposed to draw in a carthesian coordinate system so is there a better way to draw my chart in the Draw or some other package?)
[Updated on: Mon, 24 July 2006 05:56] Report message to a moderator |
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| Re: How to Draw a couple of lines over an ArrayCtrl [message #4138 is a reply to message #4130] |
Tue, 25 July 2006 00:05  |
Ordog
Messages: 13
Registered: July 2006
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Promising Member |
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ok about the why:
i thought that would be wasier than adding another layout with the painting instead of the table.
The table is the initial thing to show, the graph should only be visible after triggering and i have to be able to remove it on another trigger of course.
So i guess you would recommend using another layout?
and about the after (after the array ctrl in the list of widgets to the left?
[Updated on: Tue, 25 July 2006 02:31] Report message to a moderator |
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