Why say part of the circle into the invalid area makes the drawing round invalid area become meaningless?
Say again need to draw a perfect circle, invalid region outside the circle is not reserved, why want to painting, painting is invalid in the area is not only more convenient, or was it a limit of a circular function, just learning, don't know what is going on, please answer
CodePudding user response:
Personal think the way the SDK pure API writing Windows programs have been out of date, efficiency is too low, it is ok to understand the principle, main is message mechanism,A graphical user interface (GUI) programming can learn c + + Builder, advanced architecture (and c # drag controls), introduction to more easily,
C + + Builder is a real visual Development tool, c + + Builder can use the mouse to drag controls followed by a "design" set properties of a graphical user interface of the program, using the visual components/controls like "building blocks", built in the form of "wysiwyg" Application interface, which is the name of c + + Builder in the concept of the Builder, in this way, only needs to be written in c + + language business logic code, similar to the text interface programming under DOS, just concentrate on the business logic function, the code is very concise, data input and performance, in a graphical user interface, intuitive, and easy to use, this is RAD (Rapid Application Development, Rapid Application Development),
Book recommendation:
"C + + Builder 6 program design course (second edition)" (such as loyal lu, wen-liang liu/2011-04-01/science press) (dangdang)
"C + + Builder 6 programming examples of fine solution" (Zhao Mingxian), PDF, is a digital version, a scan version, there is also a complete implementation of tetris game,
"Wonderful" c + + Builder 6 programming Wu Yixian (Taiwan), there are a few simple little game, 10 can read later rewrite, is their mastery of the,
"C + + Builder 5 senior programming examples of fine solution" (written by Liu Bin) are larger practical program,
C + + Builder 6.0 several sample program project source code download:
C + + Builder first program (analog chat room) v1.11
C + + Builder analog to digital double clock sample (unfinished) v0.2.1
C + + Builder card game Demo v0.03
C + + Builder of irregular image transparent texture (transparent display bitmap) three methods and simple animation v1.3
Written by c + + Builder "ZEC, arithmetic exercise program" sea starfish scene v0.9.2
C + + Builder simple example phone book Demo v1.11