使用matlab实现类似windows系统中的画图小软件,带GUI界面

1.仿真效果预览
matlab2022a仿真结果如下：

2.MATLAB核心程序

function figure1_WindowButtonMotionFcn(hObject, eventdata, handles)
% hObject    handle to figure1 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
global flg mark rgb x0 y0 x y rect graph h;
if flg
    switch(graph)
        case '点线'
            currPt=get(gca, 'CurrentPoint');
            x=currPt(1,1);
            y=currPt(1,2);
            line(x,y, 'marker', mark,'color',rgb);
        case '线形'
            x0=x;y0=y;
            currPt=get(gca, 'CurrentPoint');
            x=currPt(1,1);
            y=currPt(1,2);
            line([x0 x], [y0,y],'LineStyle',mark,'color',rgb);
        case '矩形'
            currPt=get(gca, 'CurrentPoint');
            x=currPt(1,1);
            y=currPt(1,2);
            if x~=x0
                if ~isempty(h)
                    set(h,'Visible','off')
                end
                rect=[min([x0,x]),min([y0,y]),abs(x-x0),abs(y-y0)];
                if rect(3)*rect(4)~=0
                    h=rectangle('Position',rect,'LineStyle',':');
                end
            end
        case '椭圆'
            currPt=get(gca, 'CurrentPoint');
            x=currPt(1,1);
            y=currPt(1,2);
            if x~=x0
                if ~isempty(h)
                    set(h,'Visible','off')
                end
                rect=[min([x0,x]),min([y0,y]),abs(x-x0),abs(y-y0)];
                if rect(3)*rect(4)~=0
                    h=rectangle('Position',rect,'Curvature',[1,1],'LineStyle',':');
                end
            end
    end
    set(handles.edit1,'string',num2str(x));
    set(handles.edit2,'string',num2str(y));
    set(handles.text3,'string','Mouse is moving!');
end
 
function figure1_WindowButtonUpFcn(hObject, eventdata, handles)
% hObject    handle to figure1 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
global flg rgb mark h graph rect;
flg=0;
switch(graph)
    case '矩形'
        set(h,'Visible','off');h=[];
        if rect(3)*rect(4)~=0
            rectangle('Position',rect,'edgecolor',rgb,'LineStyle',mark)
        end
    case '椭圆'
        set(h,'Visible','off');h=[];
        if rect(3)*rect(4)~=0
            rectangle('Position',rect,'Curvature',[1,1],'edgecolor',rgb,'LineStyle',mark)
        end
end
set(handles.text3,'string','Mouse up!');
function edit1_Callback(hObject, eventdata, handles)
% hObject    handle to edit1 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
 
% Hints: get(hObject,'String') returns contents of edit1 as text
%        str2double(get(hObject,'String')) returns contents of edit1 as a double
 
 
% --- Executes during object creation, after setting all properties.
function edit1_CreateFcn(hObject, eventdata, handles)
% hObject    handle to edit1 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    empty - handles not created until after all CreateFcns called
 
% Hint: edit controls usually have a white background on Windows.
%       See ISPC and COMPUTER.
if ispc && isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor'))
    set(hObject,'BackgroundColor','white');
end