drawing

Path vs GeometryDrawing

Just wondering what's lighter, I'm going to have a control that draws 280 * 4 my SegmentControl, which is a quarter of a circle, and I'm just wondering what's the way that takes least memory to draw said segment. GeometryDrawing: <Image> <Image.Source> <DrawingImage> <DrawingImage.Drawing> <Geome...

C# WinForm Drawing - how to clear and redraw

Here is screen shot of my game. On the left is my problem, seem "old draw" still existing. On the right is what it should be. http://img682.imageshack.us/img682/1058/38995989.jpg drawing code Graphics g = e.Graphics; for (int i = 1; i < 27; i += 1) { for (int j = 0; j < 18; j += 1) { ...

C#- move a shape to a point which is half way from the top of the form

Hello all, Here I have to create a diamond using drawlines method and make it move horizontally along a path that is half way from the top of the form. I created a diamond and it is moving horizontally, but i want it to start moving from a position which is half way from the top of the form. This is the code to create a diamond, ...

Drawing on top of every windows on X11

Hi, I am trying to make an arcade machine. The user will purchase credits, which will allow him to play for X minutes. I want to write "9:42 minutes left" at the left corner of the screen, even if he's playing a full screen game (UrbanTerror, for example). I would really like if I could do this with Ruby, but any other language is OK. ...

How can i draw on top of an control which has many controls in it? (Z-order top)

Hi! I have a large panel with lots of pictureBoxes inside it. Is it possible to draw on these pictureboxes by drawing on the panel? What i want is that the actual drawing is on top of the panel. Is this possible to do, if so, how? Thanks in advance ...

OpenGL ES Simple Undo Last Drawing

Hi Everyone, I am trying to figure out how to implement a simple "undo" of last drawing action on the iPhone screen. I draw by first preparing the frame buffer: [EAGLContext setCurrentContext:context]; glBindFramebufferOES(GL_FRAMEBUFFER_OES, viewFramebuffer); I then prepare the vertex array and draw this way: glVertexPointer(2, GL...

Image drawing library for Haskell?

I'm working on a Haskell program for playing spatial games: I have a graph of a bunch of "individuals" playing the Prisoner's Dilemma, but only with their immediate neighbors, and copying the strategies of the people who do best. I've reached a point where I need to draw an image of the world, and this is where I've hit problems. Two o...

Suggested (simple) approach for drawing large numbers of visual elements in WPF?

I'm writing an interface that features a large (~50000px width) "canvas"-type area that is used to display a lot of data in a fairly novel way. This involves lots of lines, rectangles, and text. The user can scroll around to explore the entire canvas. At the moment I'm just using a standard Canvas panel with various Shapes placed on it....

Drawing continuously in drawing application

I was wondering how drawing applications draw the entire time the mouse is down without having empty gaps. What I mean is, for example if the program only drew circles at the mouse's X, y coordinate, then if the mouse went too quicly it would seem like a bunch of little circles rather than a nice continuous line. How can this be done wit...

Creating a Transparent Bitmap with GDI?

I want to implement a layering system in my application and was thinking of creating a bunch of transparent bitmaps, adding content to them then blitting them on top of each other, how can this be done without setting each pixel to (0,0,0,0). I'm using Pure win32, not MFC, thanks. ...

Convert latitude\longitude to screen points

I have a table with columns NElatitude,NElongitude, NWlatitude,NWlongitude, SElatitude,SElongitude, SWlatitude,SWlongitudepoints. Other application(am don't know exactly) will insert the data into this columns. Using that data in C#.net desktop application, i have been asked draw rectangles on screen. sorry for inconvenience thanks &...

Draw rectangle using latitude/longitude on screen

The existing application is providing me 8 coordinates like NElatitude, NElongitude, NWlatitude, NWlongitude, SElatitude, SElongitude, SWlatitude, SWlongitude and I have been asked to draw rectangles on screen using these coordinates as screen points. These rectangles should be with scaling. os :- winXp and C#.Net Thank you for your h...

UIView drawRect: when you draw a line, the rect area will be clear so the previous drawing is gone

It is quite hard to tell so I upload an image to show my problem: http://i42.tinypic.com/2eezamo.jpg Basically in drawRect, I will draw the line from touchesMoved as finger touches and I will call "needsDisplayInRect" for redraw. But I found that the first line is done, the second line will clear the rect part, so some previouse drawing...

Using Visual Studio 2010 Express to create a surface I can draw to

I'm coming from a Java background and trying to port a simple version of Conway's Game of Life that I wrote to C# in order to learn the language. In Java, I drew my output by inheriting from JComponent and overriding paint(). My new canvas class then had an instance of the simulation's backend which it could read/manipulate. I was then...

Use XML Layout to contain a simple drawing

I would like to create a simple drawing (lines, circles, squares, etc...) but I'm having difficulty figuring out the best way to do this. The drawing would need to be scaled to fit the display since the size is indirectly specified by the user (like in a CAD application). Also, I don't want to take up the entire display, leaving room f...

Efficiently draw a grid in Windows Forms

I'm writing an implementation of Conway's Game of Life in C#. This is the code I'm using to draw the grid, it's in my panel_Paint event. g is the graphics context. for (int y = 0; y < numOfCells * cellSize; y += cellSize) { for (int x = 0; x < numOfCells * cellSize; x += cellSize) { g.DrawLine(p, x, 0, x, y + numOfCe...

BlackBerry - How can i show a Label with emoticons??

I need to show a Label with emoticons included already in the blackbery interface, with flags, etc. ...

Drawing connected lines with OpenGL

I'm drawing convex polygons with OpenGL. I then do the same thing but use GL_LINE_LOOP. The problem I have is the lines are not always connected. How could I ensure that the lines are always connected? In the photo below, Iv highlighted in green, the corners that are connected and in red, those that are not. I would like for them to be ...

Fast sketching tools for drawing C/C++ structs, pointers, etc...

Hi. I would like to know what do you use to sketch relations between different entities in C/C++. This can be a very broad issue, so I'll try to clarify a bit more my question and give an example. I'm looking for something that is simple enough as a user, and let me sketch easily containers, pointers, etc... in an informal way. The aim ...

Making screenshot of drawing application + drawing outlines of 2D shapes

Hello. I am making a drawing program, using the Graphics 2D objects (lines, rectangles and ovals, namely) by placing them on a panel. With that in mind, I have 2 questions: 1) How can I store the images currently portrayed on the panel as PNG, JPG or similar file onto disk? 2) I have added a drag function. How can I implement a functi...