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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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How to animate scroll position? How to scroll smoothly?

I wish to move smoothly to next scroll position in my custom view (on button press or event). How to implement this? First of all I can't see scroll animation class (only alpha, rotate, scale and translate). Secondly, having animation class, I can't…
Suzan Cioc
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6 answers

How to draw a simple rounded rect in swift (rounded corners)

I managed to draw a rect :-) But I don't know how to draw a rounded rect. Can someone help me out with the following code how to round the rect? let canvas = UIGraphicsGetCurrentContext() rec = CGRectMake(0, 0, 40, 40); //var maskPath =…
mcfly soft
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7 answers

How to draw a directed arrow line in Java?

I want to draw a directed arrow line through Java. At present, I am using java.awt.Line2D.Double class to draw a line g2.setStroke(new BasicStroke(2.0f, BasicStroke.CAP_BUTT, BasicStroke.JOIN_BEVEL)); // g2 is an instance of Graphics2D g2.draw(new…
Amit
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5 answers

Stretching an UIImage while preserving the corners

I'm trying to stretch a navigation arrow image while preserving the edges so that the middle stretches and the ends are fixed. Here is the image that I'm trying to stretch: The following iOS 5 code allows the image when resized to stretch the…
Camsoft
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27
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2 answers

Draw dash line on a Canvas

How can i draw dash line on a canvas. I already tried this: Paint dashPaint = new Paint(); dashPaint.setARGB(255, 0, 0, 0); dashPaint.setStyle(Paint.Style.STROKE); dashPaint.setPathEffect(new DashPathEffect(new float[]{5, 10, 15, 20},…
Procurares
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6 answers

How to set combined color for overlapped area of two different color objects?

I am creating different custom views with two different colors. According to my app features user will drag those objects on the screen, when dragging objects will overlap each other. I want to differentiated the overlapped area, how to set the…
RajaReddy PolamReddy
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Easiest way to "draw" simple lines over an image with jQuery and save to Rails DB?

I'd like to draw lines on an image. Basically allow the user to draw a path for mountain trails they like. 1) Does anyone know a good simple library for drawing basic lines? 2) After a user draws a bunch of lines on an image, what would be the best…
Daniel Fischer
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2 answers

Draw another image on a UIImage

Is it possible to add another, smaller, image to a UIImage/UIImageView? If so, how? If not, then how can I draw a small filled triangle? Thanks
Alede
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3 answers

C#: Draw one Bitmap onto Another, with Transparency

I have two Bitmaps, named largeBmp and smallBmp. I want to draw smallBmp onto largeBmp, then draw the result onto the screen. SmallBmp's white pixels should be transparent. Here is the code I'm using: public Bitmap Superimpose(Bitmap largeBmp,…
Paul A Jungwirth
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6 answers

google maps API v3 - how to draw dynamic polygons/polylines?

I have 4 days of experience with Google Maps Javascript API and i find their documentation and information sharing confusing at best. Does anyone have experience or knowledge on how to draw polygons/polylines on a google map (using Javascript API…
David 'the bald ginger'
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How to fill a square with smaller squares/rectangles?

In my office at work, we are not allowed to paint the walls, so I have decided to frame out squares and rectangles, attach some nice fabric to them, and arrange them on the wall. I am trying to write a method which will take my input dimensions (9'…
esac
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6 answers

how to get Bitsperpixel from a bitmap

I have a 3rd party component which requires me to give it the bitsperpixel from a bitmap. What's the best way to get "bits per pixel"? My starting point is the following blank method:- public int GetBitsPerPixelMethod( system.drawing.bitmap bitmap…
jason clark
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2 answers

What exactly is a canvas path, and what is the use of ctx.closePath()?

I'm working on an HTML5 game. I need to draw tail lines in the canvas and check for intersections in the game, which is a Tron-style game. I'm actually using the drawLine() function from JCanvas, but JCanvas did not provide me a way to check for…
Aronis Mariano
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How can I draw lines into numpy arrays?

I would like to be able to draw lines into numpy arrays to get off-line features for on-line handwriting recognition. This means I don't need the image at all, but I need for some positions in a numpy array who an image of a given size would look…
Martin Thoma
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draw a circle over image opencv

Im usign python and opencv to get a image from the webcam, and I want to know how to draw a circle over my image, just a simple green circle with transparent fill my code: import cv2 import numpy import sys if __name__ == '__main__': #get…
Art Grc
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