edit.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 : edit
 * Author: [e-mail]
 * Data : 2006-03-22
 * $Id: edit.c,v 1.3 2006/04/14 20:12:15 hjs Exp $
 ********************************************************/
#include <Egui.h>
#include <widget.h>

extern Efont defaultfn;
Efont *font;
static int count = 0;

EGui_Widget * 
new_edit ( EGui_Widget *pwidget ,short x,short y,short w,short h)
{
  EGui_Widget * edit;
  widget_list * list;
  EGui_Wfunc  * edit_wfunc;
  EGui_Edit   * Edit;

  edit = (EGui_Widget *) malloc(sizeof (EGui_Widget));
  if (edit == NULL)
    {
      printf ("malloc new edit failed\n ");
      return (EGui_Widget * )NULL;
    }

  edit_wfunc = (EGui_Wfunc *) malloc (sizeof(EGui_Wfunc));
  if (edit_wfunc == NULL)
    {
      printf ("malloc new edit_wfunc failed\n ");
      return (EGui_Widget * )NULL;
    }
  memset(edit_wfunc,0,sizeof(EGui_Wfunc));

  Edit = (EGui_Edit *) malloc (sizeof(EGui_Edit));
  if (Edit == NULL)
    {
      printf ("malloc new Edit failed\n ");
      return (EGui_Widget * )NULL;
    }
  memset(Edit,0,sizeof(EGui_Edit));
  memset(Edit->buffer,0,EDIT_MAX+1);

  edit->x       = pwidget->x + x;
  edit->y       = pwidget->y + y;
  edit->width   = edit->x + w;
  edit->height  = edit->y + h;
  edit->type    = EDIT;
  edit->func    = edit_wfunc;
  edit->parent  = pwidget;
  edit->window  = pwidget->window;
  edit->child   = NULL;
  
  pwidget->child  = edit;

  edit->wpoint    = Edit;
  /* FIXME */
  Edit->font      = &defaultfn;
  Edit->visual_len= w / Edit->font->width;

  edit_init (edit_wfunc);

  add_newqueue (edit);
    
  return edit;
}

void edit_show (EGui_Widget * widget)
{
  widget->status = DISPLAY_ALL;
}


void edit_draw (EGui_Widget  * widget)
{
  short x,y,w,h;
  EGui_Window * window;
  EGui_Widget * edit;

  edit = widget;

  x  = edit->x;
  y  = edit->y;
  w  = edit->width ;
  h  = edit->height ;

  window = edit->window;
  
  if (widget->status == DISPLAY_ALL)
    {
      Egui_shadow_in (x,y,w,h, window);
    }  

}

void
edit_hide_cursor (EGui_Widget * edit)
{
  short x,y,w,h;
  EGui_Window *window;
  EGui_Edit * Edit;
  Ecolor color;
  char ch[2];
  int start;


  x  = edit->x;
  y  = edit->y;
  w  = edit->width ;
  h  = edit->height ;

  window = edit->window;
  Edit   = (EGui_Edit *)edit->wpoint;

  if (Edit->cursor_pos >= EDIT_MAX)
    return ;
  start = Edit->cursor_pos;
  if (Edit->cursor_pos >= Edit->visual_len)
    start = Edit->visual_len - 1;

  start = start * Edit->font->width;

  new_color(window,&color,0xFFFFFF);
  ch[0]= '_';
  ch[1]= 0x0;
  Egui_drawstring(x + 1 + start,y + 1,ch,font,&color,window);
}

void
edit_cursor_display (unsigned int * para)
{
  EGui_Widget * edit;
  short x,y,w,h;
  EGui_Window *window;
  Ecolor color;
  EGui_Edit * Edit;
  int start;
  char ch[2];

  edit = (EGui_Widget *)para;

  x  = edit->x;
  y  = edit->y;
  w  = edit->width ;
  h  = edit->height ;

  window = edit->window;
  Edit   = (EGui_Edit *)edit->wpoint;
  if (count == 0)
    {
      new_color(window,&color,0x0);
      count = 1;
    }
  else
    {
      new_color(window,&color,0xFFFFFF);
      count = 0;
    }
  ch[0]= '_';
  ch[1]= 0x0;

  start = Edit->cursor_pos;
  if (Edit->cursor_pos >= Edit->visual_len)
    start = Edit->visual_len - 1;

  start = start * Edit->font->width;

  Egui_drawstring(x + 1 + start,y + 1,ch,font,&color,window);
  Egui_timer_insert(200,edit_cursor_display,(unsigned int *)edit);
}

void
edit_click_left (EGui_Widget  * widget)
{
  short x,y,w,h;
  EGui_Window *window;
  Ecolor color;
  EGui_Widget * edit;

  edit = widget;

  x  = edit->x;
  y  = edit->y;
  w  = edit->width ;
  h  = edit->height ;

  window = edit->window;

  if (widget->status == DISPLAY_ALL)
    {
      Egui_timer_insert(200,edit_cursor_display,(unsigned int *)edit);
    }  
}

void
edit_add_char (EGui_Widget * edit,char ch)
{
  EGui_Edit *Edit;
  char *buffer;

  Edit = (EGui_Edit *)edit->wpoint;
  if (Edit->cursor_pos >= EDIT_MAX)
    return ;

  buffer = Edit->buffer;

  /* first is buffer[0] */
  buffer [Edit->cursor_pos] = ch;  
  Edit->cursor_pos ++;

}

void
edit_del_char (EGui_Widget * edit,char ch)
{
  EGui_Edit *Edit;
  char *buffer;

  Edit = (EGui_Edit *)edit->wpoint;
  if (Edit->cursor_pos  <= 0)
    return ;
  
  Edit->cursor_pos --;
}

void
edit_del_draw (EGui_Widget * widget)
{
  short x,y,w,h;
  EGui_Window *window;
  Ecolor color;
  EGui_Widget * edit;
  EGui_Edit *Edit;
  char *buffer;

  char ch;
  int start;

  edit = widget;

  x  = edit->x;
  y  = edit->y;
  w  = edit->width ;
  h  = edit->height ;

  window = edit->window;
  Edit = (EGui_Edit *)edit->wpoint;
  buffer = Edit->buffer;

 if (Edit->cursor_pos >= Edit->visual_len)
   {
     Egui_shadow_in (x,y,w,h, window);
     
     start = Edit->cursor_pos - Edit->visual_len;

     buffer [Edit->cursor_pos] = 0x0; 
     buffer = buffer + start;

     new_color(window,&color,0x0);
     Egui_drawstring(x + 1,y + 1,buffer,Edit->font,&color,window);
   }
 else
   {
     start = Edit->cursor_pos;
     buffer = buffer + start;
     start = start * Edit->font->width;
     /* write back the delete character by background color */
     new_color(window,&color,0xFFFFFF);
     Egui_drawstring(x + 1 + start,y + 1,buffer,Edit->font,&color,window);
     buffer [0] = 0x0;  
   }
}

void
edit_add_draw (EGui_Widget * widget)
{
  short x,y,w,h;
  EGui_Window *window;
  Ecolor color;
  EGui_Widget * edit;
  EGui_Edit *Edit;
  char *buffer;

  char ch;
  int start;

  edit = widget;

  x  = edit->x;
  y  = edit->y;
  w  = edit->width ;
  h  = edit->height ;

  window = edit->window;
  Edit = (EGui_Edit *)edit->wpoint;
  buffer = Edit->buffer;

 if (Edit->cursor_pos > Edit->visual_len)
   {
     Egui_shadow_in (x,y,w,h, window);
     
     start = Edit->cursor_pos - Edit->visual_len;

     buffer = buffer + start;
     start = start * Edit->font->width;
     
     new_color(window,&color,0x0);
     Egui_drawstring(x + 1,y + 1,buffer,Edit->font,&color,window);
   }
 else
   {
     start = Edit->cursor_pos - 1;
     buffer = buffer + start;
     start = start * Edit->font->width;
     new_color(window,&color,0x0);
     
     Egui_drawstring(x + 1 + start,y + 1,buffer,Edit->font,&color,window);
   }
}
void
edit_press_key (EGui_Widget * widget,EGui_Event *event)
{
  EGui_Widget * edit;
  unsigned char ch;

  edit = widget;

  ch = (unsigned char)(event->code);
  if (widget->status == DISPLAY_ALL)
    {
      edit_hide_cursor(edit);

      switch (ch)
	{
	case ' '...'~': 	/* 0x20---0x7E */
	  edit_add_char (edit,ch);
	  edit_add_draw(edit);
	  break;
	case 127: 	  	/* backspace and del */
	  edit_del_char (edit,ch);	 
	  edit_del_draw(edit);
	  break;  
	default:
	  return;
	}      
    }
}


int
edit_init (EGui_Wfunc  * edit_wfunc)
{
  
  edit_wfunc->show        = edit_show;
  edit_wfunc->draw        = edit_draw;
  edit_wfunc->click_left  = edit_click_left;
  edit_wfunc->press_key   = edit_press_key;
  return 0;
}