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how to sort a coordinate list according to the x coordinate
hi, I have a coordinate list like this {x1 y1 x2 y2 x3 y3...xn yn}. How to sort this list according to the x coordinate? Thank you very much. Joye -
Canvas coordinate system
hi, I want to draw a black dot on the current cursor position when I click a point on a canvas widget, but the drawing position is not always correct. It seems that the drawing black dot coordinates are propertional to the current cursor coordinates. What's problem? What is the relation between... -
How to draw and drag black dot and draw lines between dots in a canvas
hi, dear tcl/tk users, I am a beginner for tcl/tk. I want to create a small painter using canvas. The painter is like this: when I click on the canvas, it should draw a black dot at the current cursor position. After this when drawing next black dot, the every black dot should be connected...
