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Questions tagged [drawing]

Issues around forms and graphics being drawn onto a computer screen, windowing system or device

5923 questions
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wxWidgets: Is there any way to avoid or to speed up wxBitmap::ConvertToImage()?

To get some smooth graphics, I want to draw oversampled by factor 2 and scale down afterwards. So what I am doing is to draw oversampled on a wxBitmap in a wxMemoryDC, and then scale it down before copying to my dc. The code below works fine, but…
Jakob
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how can I put multiple objects on the same canvas?

i'm creating a web page where you dynamically draw multiple rectangles. I can draw the single object, but once I tried to draw another one, the previous one is gone away. I tried to save the state using save() and restore(), and it seems that I…
user2585578
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how to draw a text on a circle in SWIFT

I have no clue how to start , so I also do not have any code. My research so far pointed out, that there is no standard functionality and this has to be coded by our self ? any hint or confirmation ? Update using CoreTextArcView, which was…
mcfly soft
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XNA - Drawing Quads (and primitives) in right order

I'm fairly new to 3D-stuff in XNA and unfortunately I have encountered a problem I can't find the solution for. (Don't even know what the problem is). To cut it short: I am drawing quads in my game using: effect.World = Matrix.Identity * …
Robert Kaufmann
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Draw arbitrary convex shape knowing the lengths of its sides

I've got a list of values, which are the lengths of the sides of an arbitrary convex shape (polygon). How can I draw this shape? What algorithm can help me with this task? For example, I have a list: 2, 5, 2, 3. The drawing has to look like this:
netgoblin
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How can I overcome lagging when drawing a circle to track the mouse position in CALayer?

I have a layer-backed NSView. When the mouse enters the view, I want to draw a big circle wherever the mouse is. Basically track the mouse position. Unfortunately, the circle is lagging behind the actual mouse position. I think it has something to…
user965972
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How can I show/hide background drawing on QGraphicsScene or QGraphicsView?

I would like to have certain things drawn on QGraphicsScene, but not be QGraphicsItem (it would interfere with the processing of the QGraphicsItem collection). Example: a scene bounding rectangle, a grid I am overriding the drawBackground(QPainter…
Thalia
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draw Cross at application start C#

I am trying to draw a cross inside of a Windows Forms App. I can do it using two lines. I have tested it using a Button. Now I do not know how I can draw it automatically when opening the application without pressing a button. thanks for ur help :D
darude_cod3r
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Formula to draw pyramid of circles

I'm trying to create a pyramid of circles to my game, looking similar to this : alt text http://img266.imageshack.us/img266/3094/lab1213c.jpg But I can't make it print properly. Constantly I'm getting really strange spirals but nothing close to…
terence6
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Get coordinates of a drawing point from Chart Values in TextBoxes?

In the designer I have two TextBoxes. And also a Chart control. I want that when I type in the first textBox the number 120 and in the second one type the number 1 it will draw a point on the chart in 120,1 but I mean 120 and 1 as axis x and axis y…
Daniel Hamutel
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How to draw text of multiple sizes aligned on line with TextRenderer?

I have an array of classes that contains some text and a font. I want to draw all the text aligned on line independently on font size. I thought I can just subtract font height from Y-positiontion of the line and draw the text on the new position…
Pavl
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Drawing N-width lines?

Given a series of points, how could I calculate the vector for that line 5 pixels away? Ex: Given: \ \ \ How could I find the vector for \ \ \ \ \ \ The ones on the right. I'm trying to figure out how programs like Flash…
jmasterx
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Rendering path with Canvas.drawPath() in ICS with hardware acceleration

On ICS device, I tried the following code to draw two rectangles. Path p1 = new Path(); p1.moveTo(0, 0); p1.lineTo(0, 100); p1.lineTo(100, 100); p1.lineTo(100, 0); p1.close; Path p2 = new Path(); Matrix scaling = new Matrix(); scaling.preScale(2,…
user690421
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How refresh a DrawingArea in PyGTK?

I have an interface created with Glade. It contains a DrawingArea and buttons. I tried to create a Thread to refresh every X time my Canva. After a few seconds, I get error messages like: "X Window Server 0.0", "Fatal Error IO 11" Here is my code…
Lialon
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WPF: Convert VisualBrush to Drawing?

I have a VisualBrush and need this VisualBrush as a Drawing. Anyone knows how this can be done? Thanks for any hint!
stefan.at.kotlin
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