Class XppWindow

Description:

A class that allows you to create an X window.

You can perform simple graphics operations and interact with the window using the keyboard or mouse. All graphics operations are performed using the default X window coordinate system. In this coordinate system the top left hand of the window is (0,0) and the bottom right corner is (window_width, window_height).

If you prefer to use a different coordinate system for graphics operations use the XppCanvas class instead.

Source code:

XppWindow.h
XppWindow.c

Examples:

XppWindow(int width, int height, int x=0, int y=0, char *name = "window");

Create an X window on the root window at position (x,y) with the specified width and height and window name. If either x or y is negative then the window must be positioned on the root window using the mouse.

XppWindow(XppWindow& win, int w, int h, int x=0, int y=0, int borderWidth=1);

Create a child window within the parent window win at the relative position (x,y) with width w and height h and borderwidth borderWidth.

void DrawPoint(int x, int y);

Draw point at (x, y)

void DrawLine(int x1, int y1, int x2, int y2);

Draw line from (x1, y1) to (x2, y2)

void DrawRectangle(int x, int y, int width, int height);

Draw rectangle with top left corner at (x, y), width (w), and height (h)

void DrawFilledRectangle(int x, int y, int width, int height);

Draw filled rectangle with top left corner at (x, y), width (w), and height (h)

void DrawSquare(int x, int y, int r);

Draw square centered at (x, y) with sides of length 2(r)

void DrawFilledSquare(int x, int y, int r);

Draw filled square centered at (x, y) with sides of length 2(r)

void DrawCircle(int x, int y, int r);

Draw circle centered at (x, y) with radius (r)

void DrawFilledCircle(int x, int y, int r);

Draw filled circle centered at (x, y) with radius (r)

void DrawText(int x, int y, char *text);

Draw text in window at (x, y)

void SetAutoRedrawOnExpose(void);

Automatically redraw the contents of the window when exposed. If AutoRedrawOnExpose is set then window graphics operations are performed on a background pixmap and will only be visible after a call to Flush().

void Flush(void);

Flush the display.

void Clear(void);

Clear the window

void SetDrawColor(char *colorName);

Set the foreground drawing color

void SetDrawBlack(void);

Set the foreground color to black

void SetDrawWhite(void);

Set the foreground color to white

void Pause(void);

Wait until the user hits a mouse button or presses a key

void GetCommand(char& c);

Waits for a single character from keyboard. Character pressed is returned in c.

int ScanCommand(char& c)

Returns 1 if a character has been pressed else returns 0. Character pressed is returned in c.

int ScanMouse(int& x, int& y);

Returns 1 if mouse has been clicked else returns 0. Coordinates of mouse are returned in x and y.

int Exposed(void);

Checks if the window has been exposed.