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/**************************************************************/
#include <stdio.h>
#include <X11/Xlib.h> /* the X library */
#include <X11/Xutil.h> /* the X library */
/* a few arbitary constants */
#define START_X 10
#define START_Y 20
#define WINDOW_WIDTH 225
#define WINDOW_HEIGHT 400
#define BORDER_WIDTH 1
#define KEY_STR_LENGTH 20
Display *the_display; /* the display that will be used */
int the_screen; /* the screen that will be used */
Window root_window; /* the root window on the screen */
XSizeHints size_hints; /* size hints for the window manager */
XEvent the_event; /* the structure for the input event */
XSetWindowAttributes attributes;/* the windows attributes */
GC the_solid_GC,
the_clear_GC; /* the graphics contexts */
XGCValues the_solid_GC_values,
the_clear_GC_values;
Colormap cmap;
XFontStruct *the_fontstruct; /* the font info to be used */
Window open_window(void)
{
Window the_window; /* the window that will be opened */
int i, stop;
/* Set the display to be the default display (ie, your
display as given in the environment variable DISPLAY). */
if ((the_display = XOpenDisplay("")) == NULL)
{
printf("can't open display\n");
return(-1);
}
/* A few useful values. */
the_screen = DefaultScreen(the_display);
root_window = RootWindow(the_display,the_screen);
/* Set the size hints for the window manager. */
size_hints.x = START_X;
size_hints.y = START_Y;
size_hints.width = WINDOW_WIDTH;
size_hints.height = WINDOW_HEIGHT;
size_hints.flags = PSize|PPosition;
/* Create a window of fixed size, origin, and borderwidth.
The window will have a black border and white background. */
the_window = XCreateSimpleWindow(the_display,root_window,
size_hints.x,size_hints.y,size_hints.width,
size_hints.height,BORDER_WIDTH,
BlackPixel(the_display,the_screen),
WhitePixel(the_display,the_screen));
XSetStandardProperties(the_display,the_window,"My Window","My Icon",
None,NULL,NULL,&size_hints);
cmap = DefaultColormap(the_display, the_screen);
the_solid_GC = XCreateGC(the_display, the_window, None, &the_solid_GC_values);
the_clear_GC = XCreateGC(the_display, the_window, None, &the_clear_GC_values);
/* for a sun */
XSetBackground(the_display, the_solid_GC, BlackPixel(the_display,the_screen));
XSetForeground(the_display, the_solid_GC, BlackPixel(the_display,the_screen));
XSetBackground(the_display, the_clear_GC, WhitePixel(the_display,the_screen));
XSetForeground(the_display, the_clear_GC, WhitePixel(the_display,the_screen));
if ((the_fontstruct = XLoadQueryFont(the_display,"8x13")) == NULL)
{
printf("could not open font\n");
return(-1);
}
/* Put the font into the graphics context for draw operations. */
XSetFont(the_display, the_solid_GC, the_fontstruct->fid);
XSetFont(the_display, the_clear_GC, the_fontstruct->fid);
/* Tell the server to make the window visible. */
XMapWindow(the_display,the_window);
attributes.bit_gravity = NorthWestGravity;
XChangeWindowAttributes(the_display, the_window, CWBitGravity, &attributes);
XFlush(the_display);
return(the_window);
}
int close_window(Window the_window)
{
XDestroyWindow(the_display, the_window);
XFlush(the_display);
return(1);
}
int draw_line(Window the_window, int x1, int y1, int x2, int y2)
{
XDrawLine(the_display, the_window, the_solid_GC, x1, y1, x2, y2);
XFlush(the_display);
return(1);
}
int draw_arc(Window the_window, int x, int y, int width, int height, int angle1, int angle2)
{
XDrawArc(the_display, the_window, the_solid_GC,
x, y, width, height, angle1, angle2);
XFlush(the_display);
return(1);
}
int fill_arc(Window the_window, int x, int y, int width, int height, int angle1, int angle2)
{
XFillArc(the_display, the_window, the_solid_GC,
x, y, width, height, angle1, angle2);
XFlush(the_display);
return(1);
}
int clear_arc(Window the_window, int x, int y, int width, int height, int angle1, int angle2)
{
XFillArc(the_display, the_window, the_clear_GC,
x, y, width, height, angle1, angle2);
XFlush(the_display);
return(1);
}
int set_arc_mode (int pie_or_chord)
{
if (pie_or_chord == 0) {
XSetArcMode(the_display, the_solid_GC, ArcChord);
XSetArcMode(the_display, the_clear_GC, ArcChord);
}
else {
XSetArcMode(the_display, the_solid_GC, ArcPieSlice);
XSetArcMode(the_display, the_clear_GC, ArcPieSlice);
}
return(1);
}
int erase_line(Window the_window, int x1, int y1, int x2, int y2)
{
XDrawLine(the_display, the_window, the_clear_GC, x1, y1, x2, y2);
XFlush(the_display);
return(1);
}
int draw_text(Window the_window, char *string, int x, int y)
{
XDrawString(the_display, the_window, the_solid_GC, x, y,
string, strlen(string));
XFlush(the_display);
return(1);
}
int erase_text(Window the_window, char *string, int x, int y)
{
XDrawString(the_display, the_window, the_clear_GC, x, y,
string, strlen(string));
XFlush(the_display);
return(1);
}
int clear_window(Window the_window)
{
XClearWindow(the_display, the_window);
XFlush(the_display);
return(1);
}
int resize_window(Window the_window, int width, int height)
{
XResizeWindow(the_display, the_window, width, height);
XFlush(the_display);
return(1);
}
int raise_window(Window the_window)
{
XRaiseWindow(the_display, the_window);
XFlush(the_display);
return(1);
}
int use_font (char *font_name)
{
if ((the_fontstruct = XLoadQueryFont(the_display, font_name)) == NULL)
return(-1);
/* Put the font into the graphics context for draw operations. */
XSetFont(the_display, the_solid_GC, the_fontstruct->fid);
XSetFont(the_display, the_clear_GC, the_fontstruct->fid);
XFlush(the_display);
return(1);
}
int set_background (Window the_window, char *color_string)
{
XColor color;
int result;
if (result = XParseColor(the_display, cmap, color_string, &color)) {
if (result = XAllocColor(the_display, cmap, &color)) {
XSetWindowBackground(the_display, the_window, color.pixel);
XSetBackground(the_display, the_clear_GC, color.pixel);
XSetForeground(the_display, the_clear_GC, color.pixel);
XFlush(the_display);
}
}
return(result);
}
int set_foreground (char *color_string)
{
XColor color;
int result;
if (result = XParseColor(the_display, cmap, color_string, &color)) {
if (result = XAllocColor(the_display, cmap, &color)) {
XSetForeground(the_display, the_solid_GC, color.pixel);
XSetBackground(the_display, the_solid_GC, color.pixel);
XFlush(the_display);
return(1);
}
}
}
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