![]() In this project, I extended the double buffer with two memory buffers. ![]() The idea of DB is to make the drawing on a memory bitmap buffer and then draw the buffer over the control. With the following 2 images, I will demonstrate how double buffering works. ![]() You can find many in-depth articles about Double Buffering (DB) on The Code Project. Points of Interest Drawing Objects: Extending Double Buffer Now you're ready to start drawing some shapes. added for linking toolbox to vectshapes ( this.vectShapes1) Then link toolBox to vectShaper in the form (i.e. Simply put the controls vectShaper and toolBox into your form. An in-depth article on GDI+ can be found here. In this article, I do not address these basic problems. When searching The Code Project for GDI+, you'll find many good articles that explain what GDI+ is and the basis of drawing in. Go to here for a better example of an RTF editor. It's a simple form with a rich text box and a tool strip. RichForm2 is the form used to edit RTF text. Ele is the base class for all of the objects: rectangles, boxText, Lines, Ellipses and imageBoxes. These methods are used mainly by toolBox, which is the control used to manipulate the shapes. It contains the mouse event logic and the "extended" double buffer logic for rendering. VectShape is the UserControl used to show and manipulate the objects. All of the images shown in this article have been realized with the tool I propose. It shows most of the capabilities of GDI+, such as color transparency, pen style, start/end line cap and so on. It manages simple graphic objects like rectangles, lines and ellipses, other than images and RTF text. I propose a simple 2D vector graphic editor. This is my 3rd article, after this one and this one.
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