src/ngmx/x11.h

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  38
  39 #ifndef _x11_h
  40 #define _x11_h
  41
  42 #include <stdio.h>
  43 #include "typedefs.h"
  44 #include "Xstuff.h"
  45
  46 /* These colours will be mapped to black on a monochrome screen */
  47 extern unsigned long BLACK,BLUE,GREEN,CYAN,RED,BROWN,GREY,DARKGREY;
  48
  49 /* These colours will be mapped to white on a monochrome screen */
  50 extern unsigned long LIGHTBLUE,LIGHTGREY,LIGHTGREEN,LIGHTCYAN,
  51              LIGHTRED,VIOLET,YELLOW,WHITE;
  52
  53 typedef enum { ecbOK } ecbReturn;
  54
  55 #define CBARGS (struct t_x11 *x11,XEvent *event, Window w, void *data)
  56 /* Callback function. Return FALSE to continue, TRUE to exit */
  57
  58 typedef struct t_x11 {
  59   Display     *disp;
  60   XFontStruct *font;
  61   GC          gc;
  62   Window      root;
  63   char        *dispname;
  64   FILE        *console;
  65   int         screen,depth;
  66   Colormap    cmap;
  67   unsigned long       fg,bg;
  68   char        *title;
  69   struct t_wlist *wlist;
  70   void        (*GetNamedColor)(struct t_x11 *x11,const char *name,unsigned long *col);
  71   void        (*MainLoop)(struct t_x11 *x11);
  72   void        (*RegisterCallback)(struct t_x11 *x11,Window w,Window Parent,
  73                                   gmx_bool cb CBARGS, void *data);
  74   void        (*UnRegisterCallback)(struct t_x11 *x11, Window w);
  75   void        (*SetInputMask)(struct t_x11 *x11, Window w, unsigned long mask);
  76   unsigned long       (*GetInputMask)(struct t_x11 *x11, Window w);
  77   void        (*CleanUp)(struct t_x11 *x11);
  78   void        (*Flush)(struct t_x11 *x11);
  79 } t_x11;
  80
  81 typedef gmx_bool CallBack CBARGS;
  82
  83 typedef struct t_wlist {
  84   Window         w;             /* The window itself                    */
  85   Window         Parent;        /* It's parent window                   */
  86   CallBack       *cb;           /* Call back function                   */
  87   unsigned long          mask;          /* Input mask                           */
  88   void           *data;         /* User data struct                     */
  89   struct t_wlist *next;
  90 } t_wlist;
  91
  92 t_x11 *GetX11(int *argc, char *argv[]);
  93 /* x11 is a struct / function-set that manages a number of windows.
  94  * more or (presumably) less like Xt does, but since x11 uses only
  95  * Xlib calls, it is *PORTABLE* software.
  96  *
  97  * The x11 struct is in principle Object Oriented, in that the functions
  98  * are member of the struct. This makes the software a little more
  99  * managable. Because of portability I decided not to use C++, even
 100  * though it would be much nicer to work with in the X-Bizz.
 101  *
 102  * Here's the description of how to use the x11 struct
 103  * 1. Call the GetX11 routine, with the argc and argv from your main.
 104  *    This will sort out the X-arguments on the command line and remove
 105  *    them from the command line. When the routine returns, only the
 106  *    application specific arguments should be left. Thi opens the
 107  *    display, selects a font, creates a Graphics Context and also sets
 108  *    the colours listed above in the global variables.
 109  * 2. Call x11->RegisterCallback for each window you want to have
 110  *    managed by x11. You have to create a Callback routine for your
 111  *    application that handles *ONE* event at a time. The idea is that
 112  *    each window has it's own Callback which is not polluted by code
 113  *    for other windows, but it is of course entirely possible to have
 114  *    one Callback routine for a number of windows (eg. when you need
 115  *    to know something about your children).
 116  * 3. Call x11->SetInputMask. This comes in place of the normal
 117  *    XSelectInput, because it enables x11 to manually decide which
 118  *    events are passed to the windows. With the x11->GetInputMask,
 119  *    x11->SetInputMask combination, a child window can temporarily
 120  *    disable mouse and keyboard input for it's parent, while allowing
 121  *    redraw events to pass through for instance. Hereby a simple way
 122  *    for creating application modal child windows is implemented.
 123  * 4. Call x11->MainLoop. This will call every callback function as
 124  *    appropriate. When a window receives a message, that makes it decide
 125  *    to terminate it should call x11->UnRegisterCallback, in order to
 126  *    tell the x11 Manager that it does not want to receive any more
 127  *    events. It is up to the window to destroy itself. The MainLoop
 128  *    routine exits when there are no more windows to manage, i.e. when
 129  *    all routines have called UnRegisterCallback, OR when one Callback
 130  *    routine returns non-zero (TRUE).
 131  * 5. Call x11->CleanUp. This closes the display, and frees all
 132  *    memory allocated by x11 before.
 133  */
 134
 135 extern void GetNamedColor(t_x11 *x11,const char *name,unsigned long *col);
 136
 137 #endif  /* _x11_h */