src/ngmx/x11.h

   1 /*
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  35
  36 #ifndef _x11_h
  37 #define _x11_h
  38
  39 #include <stdio.h>
  40 #include "typedefs.h"
  41 #include "Xstuff.h"
  42
  43 /* These colours will be mapped to black on a monochrome screen */
  44 extern unsigned long BLACK,BLUE,GREEN,CYAN,RED,BROWN,GREY,DARKGREY;
  45
  46 /* These colours will be mapped to white on a monochrome screen */
  47 extern unsigned long LIGHTBLUE,LIGHTGREY,LIGHTGREEN,LIGHTCYAN,
  48              LIGHTRED,VIOLET,YELLOW,WHITE;
  49
  50 typedef enum { ecbOK } ecbReturn;
  51
  52 #define CBARGS (struct t_x11 *x11,XEvent *event, Window w, void *data)
  53 /* Callback function. Return FALSE to continue, TRUE to exit */
  54
  55 typedef struct t_x11 {
  56   Display     *disp;
  57   XFontStruct *font;
  58   GC          gc;
  59   Window      root;
  60   char        *dispname;
  61   FILE        *console;
  62   int         screen,depth;
  63   Colormap    cmap;
  64   unsigned long       fg,bg;
  65   char        *title;
  66   struct t_wlist *wlist;
  67   void        (*GetNamedColor)(struct t_x11 *x11,const char *name,unsigned long *col);
  68   void        (*MainLoop)(struct t_x11 *x11);
  69   void        (*RegisterCallback)(struct t_x11 *x11,Window w,Window Parent,
  70                                   bool cb CBARGS, void *data);
  71   void        (*UnRegisterCallback)(struct t_x11 *x11, Window w);
  72   void        (*SetInputMask)(struct t_x11 *x11, Window w, unsigned long mask);
  73   unsigned long       (*GetInputMask)(struct t_x11 *x11, Window w);
  74   void        (*CleanUp)(struct t_x11 *x11);
  75   void        (*Flush)(struct t_x11 *x11);
  76 } t_x11;
  77
  78 typedef bool CallBack CBARGS;
  79
  80 typedef struct t_wlist {
  81   Window         w;             /* The window itself                    */
  82   Window         Parent;        /* It's parent window                   */
  83   CallBack       *cb;           /* Call back function                   */
  84   unsigned long          mask;          /* Input mask                           */
  85   void           *data;         /* User data struct                     */
  86   struct t_wlist *next;
  87 } t_wlist;
  88
  89 t_x11 *GetX11(int *argc, char *argv[]);
  90 /* x11 is a struct / function-set that manages a number of windows.
  91  * more or (presumably) less like Xt does, but since x11 uses only
  92  * Xlib calls, it is *PORTABLE* software.
  93  *
  94  * The x11 struct is in principle Object Oriented, in that the functions
  95  * are member of the struct. This makes the software a little more
  96  * managable. Because of portability I decided not to use C++, even
  97  * though it would be much nicer to work with in the X-Bizz.
  98  *
  99  * Here's the description of how to use the x11 struct
 100  * 1. Call the GetX11 routine, with the argc and argv from your main.
 101  *    This will sort out the X-arguments on the command line and remove
 102  *    them from the command line. When the routine returns, only the
 103  *    application specific arguments should be left. Thi opens the
 104  *    display, selects a font, creates a Graphics Context and also sets
 105  *    the colours listed above in the global variables.
 106  * 2. Call x11->RegisterCallback for each window you want to have
 107  *    managed by x11. You have to create a Callback routine for your
 108  *    application that handles *ONE* event at a time. The idea is that
 109  *    each window has it's own Callback which is not polluted by code
 110  *    for other windows, but it is of course entirely possible to have
 111  *    one Callback routine for a number of windows (eg. when you need
 112  *    to know something about your children).
 113  * 3. Call x11->SetInputMask. This comes in place of the normal
 114  *    XSelectInput, because it enables x11 to manually decide which
 115  *    events are passed to the windows. With the x11->GetInputMask,
 116  *    x11->SetInputMask combination, a child window can temporarily
 117  *    disable mouse and keyboard input for it's parent, while allowing
 118  *    redraw events to pass through for instance. Hereby a simple way
 119  *    for creating application modal child windows is implemented.
 120  * 4. Call x11->MainLoop. This will call every callback function as
 121  *    appropriate. When a window receives a message, that makes it decide
 122  *    to terminate it should call x11->UnRegisterCallback, in order to
 123  *    tell the x11 Manager that it does not want to receive any more
 124  *    events. It is up to the window to destroy itself. The MainLoop
 125  *    routine exits when there are no more windows to manage, i.e. when
 126  *    all routines have called UnRegisterCallback, OR when one Callback
 127  *    routine returns non-zero (TRUE).
 128  * 5. Call x11->CleanUp. This closes the display, and frees all
 129  *    memory allocated by x11 before.
 130  */
 131
 132 extern void GetNamedColor(t_x11 *x11,const char *name,unsigned long *col);
 133
 134 #endif  /* _x11_h */