ui/button.c

   1 /* $Id: button.c,v 1.4 2005-01-24 22:19:10 schaffner Exp $ */
   2 /*
   3 THE COMPUTER CODE CONTAINED HEREIN IS THE SOLE PROPERTY OF PARALLAX
   4 SOFTWARE CORPORATION ("PARALLAX").  PARALLAX, IN DISTRIBUTING THE CODE TO
   5 END-USERS, AND SUBJECT TO ALL OF THE TERMS AND CONDITIONS HEREIN, GRANTS A
   6 ROYALTY-FREE, PERPETUAL LICENSE TO SUCH END-USERS FOR USE BY SUCH END-USERS
   7 IN USING, DISPLAYING,  AND CREATING DERIVATIVE WORKS THEREOF, SO LONG AS
   8 SUCH USE, DISPLAY OR CREATION IS FOR NON-COMMERCIAL, ROYALTY OR REVENUE
   9 FREE PURPOSES.  IN NO EVENT SHALL THE END-USER USE THE COMPUTER CODE
  10 CONTAINED HEREIN FOR REVENUE-BEARING PURPOSES.  THE END-USER UNDERSTANDS
  11 AND AGREES TO THE TERMS HEREIN AND ACCEPTS THE SAME BY USE OF THIS FILE.
  12 COPYRIGHT 1993-1999 PARALLAX SOFTWARE CORPORATION.  ALL RIGHTS RESERVED.
  13 */
  14
  15 #ifdef RCS
  16 static char rcsid[] = "$Id: button.c,v 1.4 2005-01-24 22:19:10 schaffner Exp $";
  17 #endif
  18
  19 #ifdef HAVE_CONFIG_H
  20 #include "conf.h"
  21 #endif
  22
  23 #include <stdlib.h>
  24 #include <string.h>
  25
  26 #include "u_mem.h"
  27 #include "fix.h"
  28 #include "pstypes.h"
  29 #include "gr.h"
  30 #include "ui.h"
  31 #include "key.h"
  32 #include "mono.h"
  33
  34 #define Middle(x) ((2*(x)+1)/4)
  35
  36 #define BUTTON_EXTRA_WIDTH  15
  37 #define BUTTON_EXTRA_HEIGHT 2
  38
  39 int ui_button_any_drawn = 0;
  40
  41 void ui_get_button_size( char * text, int * width, int * height )
  42 {
  43         int avg;
  44
  45         gr_get_string_size(text, width, height, &avg  );
  46
  47         *width += BUTTON_EXTRA_WIDTH*2;
  48         *width += 6;
  49
  50         *height += BUTTON_EXTRA_HEIGHT*2;
  51         *height += 6;
  52
  53 }
  54
  55
  56 void ui_draw_button( UI_GADGET_BUTTON * button )
  57 {
  58         int color;
  59
  60         if ((button->status==1) || (button->position != button->oldposition))
  61         {
  62                 ui_button_any_drawn = 1;
  63                 ui_mouse_hide();
  64                 gr_set_current_canvas( button->canvas );
  65                 color = button->canvas->cv_color;
  66
  67                 if (CurWindow->keyboard_focus_gadget == (UI_GADGET *)button)
  68                         gr_set_fontcolor( CRED, -1 );
  69                 else
  70                 {
  71                         if ((button->user_function==NULL) && button->dim_if_no_function )
  72                                 gr_set_fontcolor( CGREY, -1 );
  73                         else
  74                                 gr_set_fontcolor( CBLACK, -1 );
  75                 }
  76
  77                 button->status = 0;
  78                 if (button->position == 0 )
  79                 {
  80                         if (button->text )      {
  81                                 ui_draw_box_out( 0, 0, button->width-1, button->height-1 );
  82                                 ui_string_centered(  Middle(button->width), Middle(button->height), button->text );
  83                         } else  {
  84                                 gr_setcolor( CBLACK );
  85                                 gr_rect( 0, 0, button->width, button->height );
  86                                 gr_setcolor( color );
  87                                 gr_rect( 1, 1, button->width-1, button->height-1 );
  88                         }
  89                 } else {
  90                         if (button->text )      {
  91                                 ui_draw_box_in( 0, 0, button->width-1, button->height-1 );
  92                                 ui_string_centered(  Middle(button->width)+1, Middle(button->height)+1, button->text );
  93                         } else  {
  94                                 gr_setcolor( CBLACK );
  95                                 gr_rect( 0, 0, button->width, button->height );
  96                                 gr_setcolor( color );
  97                                 gr_rect( 2, 2, button->width, button->height );
  98                         }
  99                 }
 100                 button->canvas->cv_color = color;
 101                 ui_mouse_show();
 102         }
 103 }
 104
 105
 106 UI_GADGET_BUTTON * ui_add_gadget_button( UI_WINDOW * wnd, short x, short y, short w, short h, char * text, int (*function_to_call)(void) )
 107 {
 108         UI_GADGET_BUTTON * button;
 109
 110         button = (UI_GADGET_BUTTON *)ui_gadget_add( wnd, 1, x, y, x+w-1, y+h-1 );
 111
 112         if ( text )
 113         {
 114                 MALLOC( button->text, char, strlen(text)+1 );
 115                 strcpy( button->text, text );
 116         } else {
 117                 button->text = NULL;
 118         }
 119         button->width = w;
 120         button->height = h;
 121         button->position = 0;
 122         button->oldposition = 0;
 123         button->pressed = 0;
 124         button->user_function = function_to_call;
 125         button->user_function1 = NULL;
 126         button->hotkey1= -1;
 127         button->dim_if_no_function = 0;
 128
 129         return button;
 130
 131 }
 132
 133
 134 void ui_button_do( UI_GADGET_BUTTON * button, int keypress )
 135 {
 136         int result;
 137         int OnMe, ButtonLastSelected;
 138
 139         OnMe = ui_mouse_on_gadget( (UI_GADGET *)button );
 140
 141         button->oldposition = button->position;
 142
 143         if (selected_gadget != NULL)
 144         {
 145                 if (selected_gadget->kind==1)
 146                         ButtonLastSelected = 1;
 147                 else
 148                         ButtonLastSelected = 0;
 149         } else
 150                 ButtonLastSelected = 1;
 151
 152
 153         if ( B1_PRESSED && OnMe && ButtonLastSelected )
 154         {
 155
 156                 button->position = 1;
 157         } else  {
 158                 button->position = 0;
 159         }
 160
 161         if (keypress == button->hotkey )
 162         {
 163                 button->position = 2;
 164                 last_keypress = 0;
 165         }
 166
 167         if ((keypress == button->hotkey1) && button->user_function1 )
 168         {
 169                 result = button->user_function1();
 170                 last_keypress = 0;
 171         }
 172
 173
 174         //if ((CurWindow->keyboard_focus_gadget==(UI_GADGET *)button) && (keyd_pressed[KEY_SPACEBAR] || keyd_pressed[KEY_ENTER] ) )
 175         //      button->position = 2;
 176
 177         if ((CurWindow->keyboard_focus_gadget==(UI_GADGET *)button) && ((keypress==KEY_SPACEBAR) || (keypress==KEY_ENTER)) )
 178                 button->position = 2;
 179
 180         if (CurWindow->keyboard_focus_gadget==(UI_GADGET *)button)
 181                 if ((button->oldposition==2) && (keyd_pressed[KEY_SPACEBAR] || keyd_pressed[KEY_ENTER] )  )
 182                         button->position = 2;
 183
 184         button->pressed = 0;
 185
 186         if (button->position==0) {
 187                 if ( (button->oldposition==1) && OnMe )
 188                         button->pressed = 1;
 189                 if ( (button->oldposition==2) && (CurWindow->keyboard_focus_gadget==(UI_GADGET *)button) )
 190                         button->pressed = 1;
 191         }
 192
 193         ui_draw_button( button );
 194
 195         if (button->pressed && button->user_function )
 196         {
 197                 result = button->user_function();
 198         }
 199 }
 200
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