<LinearLayout android:id="@+id/svLL" android:orientation="horizontal" android:layout_width="fill_parent" android:layout_height="fill_parent"> <ScrollView android:id="@+id/sv" android:la...

I need to draw something like the following image in my iOS app, except that the arc may contain more colors: I know how to draw it, but I'm looking for a way to animate the drawing of the path....

I have a bitmap image in an image control I need to draw a red line on the bitmap each time I click with the mouse onto it, at the place where I clicked the mouse. I first thought of crea...

In portrait mode (first time drawing) After rotating to landscape, why are the older shapes: I am using UIBezierPath & CAShapeLayer to draw circles & lines in a custom UIView's layer....

Is there a Javascript library which has built-in features for quickly creating a Paint-like web application using the canvas element? EDIT: So, far, I have found Javascript libraries that al...

I have an imageview and on button click I draw some bezier paths and some text layer too. On undo, I've removed last drawn path and text layer. Now I want to resize my image View to set up in uper...

Could please somebody explain me (ASCII is really welcome) what the stride argument stands for in Canvas.drawBitmap() and in Bitmap.setPixels()/getPixels()? I understand it's a way to skip elements...

How can I smooth out the circle? At some points there are bumps and it's quite .. rough. I need to draw multiple circles inside and it really looked bad when I tried it. Is this some issue with PIL...

How to make an image circular and give it white circular border? Is it necessary to use two image views – one for the image and other for the white border? Is there any other way to do this?

I have a method for drawing, but drawing performance is greatly affected when adjusting the scale factor for UIGraphicsBeginImageContextWithOptions. When the scale is 1.0, everything works super f...

I have a UIImageView inside a UIScrollView which automatically zooms out to fit the image supplied. The user can zoom as usual with a pinch gesture, and the pan gesture is set to require two touche...

I have a win32 application which was developed in c++. The application draws some stuff on the window using basic shapes (rectangles). The windows is repainted every 20ms (50hz) using InvalidateRec...

Following this Answer, I have implemented a CanvasView to draw with the Apple Pencil: https://mcmap.net/q/1771907/-drawing-class-drawing-straight-lines-instead-of-curved-lines import Foundation im...

I have a strange problem with matplotlib under Eclipse I've tested this code and this works fine in the command line: import matplotlib.pyplot as plt import matplotlib.pylab as pylab plt.plot([1,2...

Using AWT, I would like to save resources like flash does, by stopping draws to the screen when the window is hidden. But first, I need a method to detect if the Frame is completely covered by one ...

I'm using Embarcadero RAD Studio XE7 to create a C++ graphical application in which I'm trying to animate a circular progress using GDI+ and some dash pattern properties. The idea is very simple: ...

I have checked out this question, but the answer is very large for me: How to know if a line intersects a plane in C#? - Basic 2D geometry Is there any .NET method to know if a line defined by tw...

I'm working with the Drawing Library of the Google Maps API and i want to trigger the drawing of a marker with a custom button. I've read this part of the documentation : Hiding the drawing ...

Is there a function or some other way to enable free-hand drawing (i.e., drawing of random shapes/sizes) using the mouse in Shiny? Specifically, I'd like to be able to "interact" with a plot from...

The question probably applies to drawing systems in general. I was wondering how the undo functionality is implemented in PS. Does the program take snapshots of the canvas before each operation? If...

I'm painting to a canvas which isn't being cleared and making it so that the canvas either fades to a solid colour over time, or fades in alpha revealing the layer behind. My first instinct was to...

I want to plot a binary tree using graphviz, and it is important that the left child of a node appear to the left (duh) of the right child. If there is no left child, I want an empty space on the l...

I asked "How can I tell if a point belongs to a certain line?" before and I found a suitable answer so thank you very much. Now, I would like to know how to tell if a certain point is close to my ...

How do I create an in-memory fully transparent SWT image and draw a black line on it with antialias enabled? I expect the result to include only black color and alpha values ranging from 0 to 255 ...

I've been searching for an answer for hours but have trouble finding anything on the topic. I have a question related to Objective-c. I'm making an application in which a UIView checks for touches...