C pointer principle (64)-Ncurses-text terminal graphics

Panel Library allows you to easily manage the Panel:

1. Use the newwin () function to create a window that will be added to the Panel.

2. Create a panel (using the created window) and press the panel into the stack according to the visible sequence specified by the user. Call

New_panel () function to create the panel.

3. Call the update_panels () function to write the panel to the virtual screen in the correct order and call the doupdate () function.

Data can be displayed on the panel.

4. show_panel (), hide_panel (), move_panel () and other functions are used to display, hide, and shift the Panel respectively.

You can use the panel_hidden () and panel_window () auxiliary functions when performing other operations. You can also

The user pointer is used to store panel data. The set_panel_userptr () and panel_userptr () functions use

To set and obtain the user pointer of a panel.

5. After a panel is used, use the del_panel () function to delete the panel.

The following is an example.

Dp @ dp :~ /Cursestest % cat x. c

# Include

Int main ()

{

WINDOW * my_wins [3];

PANEL * my_panels [3];

Int lines = 10, cols = 40, y = 2, x = 4, I;

Initscr ();

Cbreak ();

Noecho ();

/* Create a window for each panel */

My_wins [0] = newwin (lines, cols, y, x );

My_wins [1] = newwin (lines, cols, y + 1, x + 5 );

My_wins [2] = newwin (lines, cols, y + 2, x + 10 );

/* Add a border for the window so that you can see the effect of the Panel */

For (I = 0; I <3; ++ I)

Box (my_wins [I], 0, 0 );

/* Associate a window for each panel in the order of bottom-up */

My_panels [0] = new_panel (my_wins [0]);

/* Press the Panel 0 into the stack and stack it in sequence: stdscr0

*/

My_panels [1] = new_panel (my_wins [1]);

/* Press panel 1 into the stack, stacked in sequence: stdscr01

*/

My_panels [2] = new_panel (my_wins [2]);

/* Press panel 2 into the stack and stack it in sequence: stdscr012 */

/* Update the stack sequence. Place panel 2 on the top of the stack */

Update_panels ();

/* Display on screen */

Doupdate ();

Getch ();

Endwin ();

}

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Dp @ dp :~ /Cursestest % gcc-lncursesw-lpanel x. c-o mytest

Dp @ dp :~ /Cursestest %./mytest

Three windows are displayed on the screen. Each window is a panel, and each panel is associated with a window. As shown in: