widget_main.c

EGui是一个开源的图形系统软件,类似于QT/Embedded、GTK-FB、MicroWindow。目标是嵌入式平台整合解 决方案。基于Linux Framebuffer 设备驱动上实现。有完

/********************************************************
 * Egui code,LGPL
 * Function : Widget mail function 
 * Author: [e-mail]
 * Data : 2006-03-21
 * $Id: widget_main.c,v 1.9 2006/04/14 20:12:15 hjs Exp $
 ********************************************************/
#include <stdio.h>
#include <Egui.h>
#include <widget.h>
#include <elist.h>

LIST_HEAD(root_widget);

EGui_Widget *cursor_widget=NULL;
EGui_Widget *focus_widget=NULL;
/* parent */

int 
add_to_parent (EGui_Widget *widget,EGui_Widget *parent)
{
  widget_list * c_list, * p_list;
  
  c_list = widget->list;
  p_list = parent->list;
  
  c_list->next  = p_list->child;
  c_list->prev  = (struct list_head *)p_list;
  p_list->child = (struct list_head *)c_list; 

  /* have more children */
  if (c_list->next)
    {
      c_list->prev = (struct list_head *)c_list;
    }

  c_list->child = NULL;
  
}
/* end parent */

int 
add_newqueue ( EGui_Widget *widget)
{
  widget_list * list;

  /* alloc a node for the new widget */
  widget->list = (widget_list * ) malloc (sizeof(widget_list));
  if ( widget->list == NULL)
    {
      printf ("malloc widget_list error!\n");
      return -1;
    }
  memset(widget->list,0,sizeof(widget_list));

  list = widget->list;
  /* set list */
  list->widget = widget;    

  list->vx = widget->x;
  list->vy = widget->y;
  list->vw = widget->width;
  list->vh = widget->height;

  if (widget->parent)
    {    
      add_to_parent (widget,widget->parent);
    }
  else
    {
      list_add ((struct list_head *)(list),&root_widget);
    }

  return 0;
}

int
del_queue (EGui_Widget *widget)
{
  list_del ((struct list_head *)widget->list);
}

/* return 
 * 0 : inside widget
 * 1 : outside widget
 */

int 
inside_widget (int x,int y,widget_list * list)
{
  int wx,wy,wx1,wy1;
  
  wx  = list->widget->window->x + list->vx;
  wy  = list->widget->window->y + list->vy;
  wx1 = list->widget->window->x + list->vw;
  wy1 = list->widget->window->y + list->vh;

  if ( wx <= x && wy <= y && x < wx1 && y < wy1 )
    {
      /* x,y in Widget */
      return 0;
    }

  return 1;
}

widget_list * 
find_child (int x,int y,widget_list * list )
{
  int inside;
  /* first child */
  inside = inside_widget ( x, y, list);

  if (inside == 0) 		/* IF_1 */
    {
      return list ;
    }
  else				/* ELSE_1 */
    {
      /* other children,brother */
      widget_list * b_list;
      b_list = list;
      
      while (b_list->next)
	{
	  inside = inside_widget ( x, y, (widget_list *)b_list->next);	  
	  if (inside == 0)	/* IF_2 */
	    {
	      list = (widget_list *)b_list->next;
	      return list;
	    }
	  b_list = (widget_list *)b_list->next;
	} /* while */
    } /* else  IF_1 */
  return 0;
}


EGui_Widget
* find_widget_byxy (int x,int y)
{
  int inside = 1;
  widget_list * list;
  
  list = (widget_list *)root_widget.next;
  /* No any widget */
  if ((root_widget.next == &root_widget) || (list->widget == NULL) )
    return NULL; 
  

  if (cursor_widget != NULL)
    inside = inside_widget ( x, y, cursor_widget->list);

  /* don't inside current widget */
  if (inside)
    {
      inside = inside_widget ( x, y, list);

      /* is point (x,y) within the widget */
      while (inside)
	{ 
	  list   = (widget_list *)list->next;
	  if (list == (widget_list *)&root_widget)
	    return NULL;
	  inside = inside_widget ( x, y, list);	   
	}
    }
  else
    {
      /* old cursor widget */
      list = cursor_widget->list ;
    }
  
  /* have widget */
  if (list->widget->child)
    { 
      widget_list * c_list;
      c_list = find_child(x,y,list->widget->child->list);
      
      if (c_list != 0)
	list = c_list;
    }
  
  return list->widget;

}

/* widget event */
int
cursor_move (EGui_Event *event)
{
  EGui_Widget * widget;
  
  hide_cursor ();
  
  widget = find_widget_byxy (event->x,event->y);
  if (widget != NULL)
    {
      if (widget != cursor_widget)
	{
	  widget_draw_in (widget);
	  if (cursor_widget)
	    widget_draw_out (cursor_widget);
	  cursor_widget = widget;
	}      
    }
  show_cursor (event->x,event->y);

}


int
click_left (EGui_Event *event)
{
  EGui_Widget * widget;
  
  hide_cursor ();
  
  widget = find_widget_byxy (event->x,event->y);
  if (widget != NULL)
    {
      focus_widget = widget;
      if (widget != cursor_widget)
	{
	  cursor_widget = widget;
	}
      widget_click_left (widget);
    }
  show_cursor (event->x,event->y);

}

int 
rel_left (EGui_Event *event)
{
  EGui_Widget * widget;
  
  hide_cursor ();
  
  widget = find_widget_byxy (event->x,event->y);
  if (widget != NULL)
    {
      if (widget != cursor_widget)
	{
	  cursor_widget = widget;
	}
      widget_rel_left (widget);
    }
  show_cursor (event->x,event->y);
}


/*NOTE: cursor's position isn't the same  
 * with focus_widget.
 */

unsigned char kbd_map[128] =
        "\000\0331234567890-=\177\t"                    /* 0x00 - 0x0f */
        "qwertyuiop[]\r\000as"                          /* 0x10 - 0x1f */
        "dfghjkl;'`\000\\zxcv"                          /* 0x20 - 0x2f */
        "bnm,./\000*\000 \000\201\202\203\204\205"      /* 0x30 - 0x3f */
        "\206\207\210\211\212\000\000789-456+1"         /* 0x40 - 0x4f */
        "230\177\000\000\213\214\000\000\000\000\000\000\000\000\000\000" /* 0x50 - 0x5f */
        "\r\000/";                                      /* 0x60 - 0x6f */

int 
press_key (EGui_Event *event)
{
  EGui_Widget * widget;
  
  hide_cursor ();
  
  widget = focus_widget;
  if (widget != NULL)
    {
      event->code = kbd_map [event->code];
      widget_press_key(widget,event);
    }
  show_cursor (event->x,event->y);
}



int
send_event_widget (EGui_Event *event)
{
   
  switch (event->type)
    {
    case PRESS_KEY:
      press_key (event);
      break;
    case CLICK_LEFT:
      click_left (event);
      break;
    case CLICK_RIGHT:
      break;
    case CLICK_MIDDLE:
      break;
    case REL_LEFT:
      rel_left (event);
      break;
    case RELEASE_KEY:
      break;
    case FOCUS_CHANGED:
      break;
    case W_SIZE_CHANGED:
      break;
    case CURSOR_MOVE:
      cursor_move (event);
      break;
    default:
      break;    
    }

  return 0;

}