1.1.2-learning the mixed programming of opencv and MFC-drawing tool for drawing a rectangle in a straight line

Source code: http://download.csdn.net/detail/nuptboyzhb/3961685

Drawing tools

1. draw a straight line

Add the "line" menu item and create a Class Wizard;

Add the member variable my_draw_flag to the cxxxxxxview class and initialize it to 0 in the constructor.

Export my_draw_flag = 1 to draw a straight line in the processing function of the 'line' menu item.

Add window message processing, wm_lbuttondown, wm_mousemove, and wm_lbuttonup

Add member variables

The value is initialized to 0 in the constructor;

Added the onlbuttondownrunflag and onlbuttonuprunflag member variables of the int type. And initialize it to 0 in the constructor of the View class;

Add iplimage member variable

Ø in the onlbuttondown (uint nflags, cpoint point) function, save the point when the mouse is pressed:

My_cvpoint1 = cvpoint (point. X, point. y );

Onlbuttondownrunflag = 1;

Onlbuttonuprunflag = 0;

Bufimg = cvcloneimage (workimg); // bufimg is used to save the image after each painting.

Ø in the onmousemove (uint nflags, cpoint point) function, edit the Code as follows:

If (onlbuttondownrunflag & onlbuttonuprunflag = 0)

{

Cvpointiner_point = cvpoint (point. X, point. y );

Iplimage * SRC;

If (! Workimg)

{

Return;

}

Intthickness, colorr, colorg, colorb;

Thickness = 2; // line width

Colorr = 0;

Colorg = 255;

Colorb = 0;

Src = cvcloneimage (bufimg );

Switch (my_draw_flag)

{

Case0:

Break;

Case1:

Cvflip (SRC );

Cvline (SRC, my_cvpoint1, iner_point, cvscalar (colorr, colorg, colorb), thickness );

Cvflip (SRC );

Workimg = cvcloneimage (SRC); // display the current line

Invalidate (); // redraw

Break;

}

Cvreleaseimage (& SRC );

}

Cscrollview: onmousemove (nflags, point );

Ø message processing function by mouse

Void ccvmfcview: onlbuttonup (uintnflags, cpoint point)

Onlbuttonuprunflag = 1;

Onlbuttondownrunflag = 0;

 

 

Draw a rectangle

1. Add the menu item to draw a rectangle

2. Set the attributes as follows:

3. Create a Class Wizard and edit the message response function:

Void ccvmfcview: onmydrawrectangle ()

{

// Todo: add your command handler code here

My_draw_flag = 2;

}

4. In the mousemove message response function, add

Cvflip (SRC );

Cvrectangle (SRC, my_cvpoint1, iner_point, cvscalar (colorr, colorg, colorb), thickness );

Cvflip (SRC );

Workimg = cvcloneimage (SRC); // display the current rectangle

Invalidate (); // redraw

Circle

The procedure for adding a menu is the same as that for adding a rectangle:

The key is to write the case 3 code.

Case 3:

Int r = 0;

R = (INT) SQRT (iner_point.x-my_cvpoint1.x) * (iner_point.x-my_cvpoint1.x)

+ (Iner_point.y-my_cvpoint1.y) * (iner_point.y-my_cvpoint1.y ));

Cvflip (SRC );

Cvcircle (SRC, my_cvpoint1, R, cvscalar (colorb, colorg, colorr), thickness );

Cvflip (SRC );

Workimg = cvcloneimage (SRC); // display the current rectangle

Invalidate (); // redraw

Break;