参考网上程序，将鼠标在屏幕画图和局部放大镜结合起来，适合讲课演示时使用，做局部放大等。。

以matlab实现鼠标画图，里面包含代码

基于qml的canvas画板功能，实现利用鼠标进行画圆画矩形等，有预览路径

function varargout = net1(varargin) % NET1 M-file for net1.fig % NET1, by itself, creates a new NET1 or raises the existing % singleton*. % % H = NET1 returns the handle to a new NET1 or the handle to % the existing singleton*. % % NET1('CALLBACK',hObject,eventData,handles,...) calls the local % function named CALLBACK in NET1.M with the given input arguments. % % NET1('Property','Value',...) creates a new NET1 or raises the % existing singleton*. Starting from the left, property value pairs are % applied to the GUI before net1_OpeningFunction gets called. An % unrecognized property name or invalid value makes property application % stop. All inputs are passed to net1_OpeningFcn via varargin. % % *See GUI Options on GUIDE's Tools menu. Choose "GUI allows only one % instance to run (singleton)". % % See also: GUIDE, GUIDATA, GUIHANDLES % Last Modified by GUIDE v2.5 02-Aug-2009 23:24:02 % Begin initialization code - DO NOT EDIT gui_Singleton = 1; gui_State = struct('gui_Name', mfilename, ... 'gui_Singleton', gui_Singleton, ... 'gui_OpeningFcn', @net1_OpeningFcn, ... 'gui_OutputFcn', @net1_OutputFcn, ... 'gui_LayoutFcn', [] , ... 'gui_Callback', []); if nargin && ischar(varargin{1}) gui_State.gui_Callback = str2func(varargin{1}); end if nargout [varargout{1:nargout}] = gui_mainfcn(gui_State, varargin{:}); else gui_mainfcn(gui_State, varargin{:}); end % End initialization code - DO NOT EDIT % --- Executes just before net1 is made visible. function net1_OpeningFcn(hObject, eventdata, handles, varargin) % This function has no output args, see OutputFcn. % hObject handle to figure % eventdata reserved - to be defined in a future version of MATLAB % handles structure with handles and user data (see GUIDATA) % varargin command line arguments to net1 (see VARARGIN) % Choose de

这也是一个基于MFC的画图程序，实现了拖动鼠标画图的功能，虽然并不高端，但对于初学者来学习MFC的图形技术一块很有帮助！

用C#编写的一个简单的绘图工具，用鼠标拖动画圆，矩形，线条等，适合初学者。

别因为我把资源分设的这么高，就认为我很自私。其实这个程序是我在两天内，熬夜通宵、加班加点赶出来的。 实现的功能多元化，用鼠标拖动画各种直线、矩形、椭圆、多边形、修正全部bug，另外还有个旋转的五角星。保证您下了绝不后悔。大作业觉对拿满分。 有事请加我加我QQ：983460327