buttons.c

linux下将各类格式图片转换工具

      
      if (XCheckMaskEvent (xinfo->display, EVENT_MASK, &event))
      {
	 switch (event.type)
	 {
	    case ButtonPress:
	       wait_release = NO;
	       if (!(binfo->pressed [RECORD_BUTTON] &&
		     !binfo->record_is_rewind))
		  for (button = 0; button < NO_BUTTON; button++)
		  {
		     int x0, y0, x1, y1; /* button coordinates */
		  
		     x0 = button * (binfo->width / NO_BUTTON);
		     y0 = binfo->progbar_height;
		     x1 = x0 + binfo->width / NO_BUTTON;
		     y1 = y0 + binfo->height - binfo->progbar_height - 1;
		     if (event.xbutton.x > x0 && event.xbutton.x < x1
			 && event.xbutton.y > y0 && event.xbutton.y < y1) 
		     {
			draw_button (xinfo, binfo, button,
				     !binfo->pressed [button]);
			wait_release = YES;
			break;
		     }
		  }
	       break;
	    case ButtonRelease:
	       wait_release = NO;
	       break;
	    default:
	       wait_release = NO;
	       draw_control_panel (xinfo, binfo, n, n_frames);
	       display_image (0, 0, xinfo);
	       break;
	 }
	 leave_eventloop = !wait_release
			   && (binfo->pressed [PLAY_BUTTON]
			       || binfo->pressed [STOP_BUTTON]
			       || binfo->pressed [RECORD_BUTTON]
			       || binfo->pressed [QUIT_BUTTON]);
      }
   } while (!leave_eventloop);

   if ((binfo->pressed [RECORD_BUTTON] && !binfo->record_is_rewind)
       && n == n_frames - 1)
   {
      binfo->record_is_rewind = YES;
      draw_button (xinfo, binfo, RECORD_BUTTON, NO);
   }
}

/*****************************************************************************

				private code
  
*****************************************************************************/

static void
draw_control_panel (x11_info_t *xinfo, binfo_t *binfo,
		    unsigned n, unsigned n_frames)
/*
 *  Draw control panel 'binfo' with all buttons and progressbar in
 *  the given 'window'.
 *  'n' gives the current frame, 'whereas' n_frames is the total number of
 *  frames of the video stream.
 *
 *  No return value.
 */
{
   buttons_t button;
   
   XFillRectangle (xinfo->display, binfo->window, binfo->gc [NGRAY],
		   0, 0, binfo->width, binfo->height);
   draw_progress_bar (xinfo, binfo, n, n_frames);
   for (button = 0; button < NO_BUTTON; button++)
      draw_button (xinfo, binfo, button, binfo->pressed [button]);
}

static void
draw_progress_bar (x11_info_t *xinfo, binfo_t *binfo, unsigned n,
		   unsigned n_frames)
/*
 *  Draw progressbar of control panel 'binfo' in the given 'window'.
 *  'n' gives the current frame, whereas 'n_frames' is the total number of
 *  frames of the video stream.
 *
 *  No return value.
 */
{
   unsigned x, y, width, height;

   x 	  = 2;
   y 	  = 1;
   width  = binfo->width - 5;
   height = binfo->progbar_height - 3;
   
   XDrawLine (xinfo->display, binfo->window, binfo->gc [DGRAY],
	      x, y, x + width, y);
   XDrawLine (xinfo->display, binfo->window, binfo->gc [DGRAY],
	      x, y, x, y + height - 1);
   XDrawLine (xinfo->display, binfo->window, binfo->gc [LGRAY],
	      x + width, y + 1, x + width, y + height);
   XDrawLine (xinfo->display, binfo->window, binfo->gc [LGRAY],
	      x, y + height, x + width, y + height);

   x++; y++; width  -= 2; height -= 2;
   XFillRectangle (xinfo->display, binfo->window, binfo->gc [NGRAY],
		   x, y, width, height);

   XFillRectangle (xinfo->display, binfo->window, binfo->gc [BLACK],
		   x + n * max (1, width / n_frames), y,
		   max (1, width / n_frames), height);
}

static void
draw_button (x11_info_t *xinfo, binfo_t *binfo,
	     buttons_t button, bool_t pressed)
/*
 *  Draw 'button' of control panel 'binfo' in the given 'window'.
 *  'pressed' indicates whether the button is pressed or not.
 *
 *  No return value.
 */
{
   grayscale_t top, bottom;		/* index of GC */
   unsigned    x, y, width, height;	/* coordinates of button */
   
   x 	  = button * (binfo->width / NO_BUTTON);
   y 	  = binfo->progbar_height;
   width  = binfo->width / NO_BUTTON;
   height = binfo->height - binfo->progbar_height - 1;
   
   if (width < 4 || height < 4)
      return;
   
   if (pressed)
   {
      top    = DGRAY;
      bottom = LGRAY;
   }
   else
   {
      top    = LGRAY;
      bottom = DGRAY;
   }

   x 	 += 2;
   width -= 4;
   
   XDrawLine (xinfo->display, binfo->window, binfo->gc [top],
	      x, y, x + width, y);
   XDrawLine (xinfo->display, binfo->window, binfo->gc [top],
	      x, y, x, y + height - 1);
   XDrawLine (xinfo->display, binfo->window, binfo->gc [bottom],
	      x + width, y + 1, x + width, y + height);
   XDrawLine (xinfo->display, binfo->window, binfo->gc [bottom],
	      x, y + height, x + width, y + height);

   x++; y++; width  -= 2; height -= 2;
   XFillRectangle (xinfo->display, binfo->window, binfo->gc [NGRAY],
		   x, y, width, height);

   switch (button)
   {
      case STOP_BUTTON:
	 XFillRectangle (xinfo->display, binfo->window, binfo->gc [BLACK],
			 x + width / 2 - 6, y + height / 2 - 4, 11, 11);
	 if (pressed && !binfo->pressed [STOP_BUTTON])
	 {
	    draw_button (xinfo, binfo, PLAY_BUTTON, NO);
	    draw_button (xinfo, binfo, PAUSE_BUTTON, NO); 
	    draw_button (xinfo, binfo, RECORD_BUTTON, NO); 
	 }
	 break;
      case PAUSE_BUTTON:
	 XFillRectangle (xinfo->display, binfo->window, binfo->gc [BLACK],
			 x + width / 2 - 6, y + height / 2 - 4, 5, 11);
	 XFillRectangle (xinfo->display, binfo->window, binfo->gc [BLACK],
			 x + width / 2 + 1, y + height / 2 - 4, 5, 11);
	 break;
      case PLAY_BUTTON:
	 {
	    XPoint triangle [3];

	    triangle [0].x = x + width / 2 - 5;
	    triangle [0].y = y + height / 2 - 5;
	    triangle [1].x = 10;
	    triangle [1].y = 6;
	    triangle [2].x = -10;
	    triangle [2].y = 6;

	    XFillPolygon (xinfo->display, binfo->window, binfo->gc [BLACK],
			  triangle, 3, Convex, CoordModePrevious);
	    if (pressed && !binfo->pressed [PLAY_BUTTON]
		&& binfo->pressed [RECORD_BUTTON])
	       draw_button (xinfo, binfo, RECORD_BUTTON, NO);
	 }
	 break;
      case RECORD_BUTTON:
	 if (!binfo->record_is_rewind)
	 {
	    XFillArc (xinfo->display, binfo->window, binfo->gc [RED],
		      x + width / 2 - 5, y + height / 2 - 5, 11, 11, 0,
		      360 * 64);
	    if (pressed && !binfo->pressed [RECORD_BUTTON])
	    {
	       draw_button (xinfo, binfo, STOP_BUTTON, YES);
	       draw_button (xinfo, binfo, PLAY_BUTTON, NO);
	       draw_button (xinfo, binfo, PAUSE_BUTTON, NO); 
	    }
	 }
	 else
	 {
	    XPoint triangle [3];

	    triangle [0].x = x + width / 2 + 5;
	    triangle [0].y = y + height / 2 - 5;
	    triangle [1].x = -10;
	    triangle [1].y = 6;
	    triangle [2].x = 10;
	    triangle [2].y = 6;

	    XFillPolygon (xinfo->display, binfo->window, binfo->gc [BLACK],
			  triangle, 3, Convex, CoordModePrevious);
	    if (pressed && !binfo->pressed [RECORD_BUTTON]
		&& binfo->pressed [PLAY_BUTTON])
	       draw_button (xinfo, binfo, PLAY_BUTTON, NO);
	 }
	 break;
      case QUIT_BUTTON:
	 {
	    XPoint triangle [3];

	    triangle [0].x = x + width / 2 - 6;
	    triangle [0].y = y + height / 2 + 2;
	    triangle [1].x = 6;
	    triangle [1].y = -7;
	    triangle [2].x = 6;
	    triangle [2].y = 7;

	    XFillPolygon (xinfo->display, binfo->window, binfo->gc [BLACK],
			  triangle, 3, Convex, CoordModePrevious);
	    XFillRectangle (xinfo->display, binfo->window, binfo->gc [BLACK],
			    x + width / 2 - 5, y + height / 2 + 4, 11, 3);
	 }
	 break;
      default:
	 break;
   }
   binfo->pressed [button] = pressed;
}

#endif /* not X_DISPLAY_MISSING */