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gadget_Space.c

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/*
 *    gui - [gega user interface] the flexible solution for user interface problems
 *    Copyright (C) 2002  Gergely Gati
 *
 *    This program is free software; you can redistribute it and/or modify
 *    it under the terms of the GNU General Public License as published by
 *    the Free Software Foundation; version 2 of the License.
 *
 *    This program is distributed in the hope that it will be useful,
 *    but WITHOUT ANY WARRANTY; without even the implied warranty of
 *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *    GNU General Public License for more details.
 *
 *    You should have received a copy of the GNU General Public License
 *    along with this program; if not, write to the Free Software
 *    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 *    Gergely Gati
 *      email:           g.gati@freemail.hu
 *      AIM screenname:  GatiGergely
 *      ICQ number:      93131690
 *
 */
/*
 *  space.c
 *
 *  Author            : Gergely Gáti
 *  Date              :
 *  Description       :
 *
 */
#include <stdlib.h>

#include "gadgets/gadget_Space.h"
#include "debug.h"
#include "classes.h"
#include "Bases.h"
#include "Module.h"
#include "Common.h"
#include "Window.h"



struct _space
{
  Gadget_t gadget;
  int width;
  int height;
  u32 color;
};


static bases_Modules_t *api;
VERSION("Space.gadget",1,0,"Gergely Gati","g.gati@freemail.hu");


static gadget_Binding_t binding[]=
{
  {"width",TAG_SPC_WIDTH,GADGET_INT,NULL},
  {"height",TAG_SPC_HEIGHT,GADGET_INT,NULL},
  {"color",TAG_SPC_COLOR,GADGET_INT,NULL},
  GADGET_BINDING_DONE
};



/*
 *  This function is always called after the Gadget_t has been created and
 *  attached to the Gadget_t tree, but before the call to space_layout(). It may be
 *  called more than once. It must fill in the Gadget_t's minimum and maximum
 *  sizes into the supplied extent structures.
 */
static void space_get_extent(Gadget_t *this, Extent_t *min, Extent_t *max)
{
  debug_Begin();

  if(((space *)this)->width<0)
  {
    min->width=0;
    max->width=GADGET_MAXIMUM_SIZE;
  }
  else
  {
    min->width=((space *)this)->width;
    max->width=((space *)this)->width;
  }
  if(((space *)this)->height<0)
  {
    min->height=0;
    max->height=GADGET_MAXIMUM_SIZE;
  }
  else
  {
    min->height=((space *)this)->height;
    max->height=((space *)this)->height;
  }

  debug_End();
}


/*
 *  This function is called always after space_get_extent() has been called at
 *  least once. It receives a position and an extent which determine the
 *  position and the size of the Gadget_t on the screen. This extent is always
 *  between the minimum and maximum sizes which were returned by
 *  space_get_extent() of the same gadget. After this call the Gadget_t is made
 *  visible.
 */
static void space_layout(Gadget_t *this, Rect_t *rect)
{
  debug_Begin();

  api->glw_Call(GLW_SETCOLOR,TAG_GLW_WINDOW,this->window->handle, TAG_GLW_RGB,((space *)this)->color,TAG_DONE);
  api->glw_Call(GLW_DRAWFILLEDRECT,TAG_GLW_WINDOW,this->window->handle,TAG_GLW_LEFT,rect->left,TAG_GLW_TOP,rect->top,TAG_GLW_WIDTH,rect->width,TAG_GLW_HEIGHT,rect->height,TAG_DONE);

  debug_End();
}


#if 0
  static int space_input_event_handler(Gadget_t *gad, struct glw_Event *event)
  {
    return(0);
  }
#endif


int space_init_gadget(Gadget_t *this, tag *taglist)
{
  debug_Begin();

  ((space *)this)->width=(int)tag_GetTagData(taglist,TAG_SPC_WIDTH,(u32)-1);
  ((space *)this)->height=(int)tag_GetTagData(taglist,TAG_SPC_HEIGHT,(u32)-1);
  ((space *)this)->color=(int)tag_GetTagData(taglist,TAG_SPC_COLOR,(u32)~0);

  debug_End();

  return(0);
}


static int space_gadget_event_handler(Gadget_t *this, int event, tag *taglist)
{
  int ret=-1;

  debug_Begin();

  if(this!=NULL&&event>=0)
  {
    switch(event)
    {
      case GADEV_INIT_GADGET:
      {
        ret=space_init_gadget(this,taglist);
        break;
      }
      case GADEV_DELETE_GADGET:
      {
        ret=0;
        break;
      }
      case GADEV_GET_EXTENT:
      {
        Extent_t *min,*max,n,x;
        min=(Extent_t *)tag_GetTagData(taglist,TAG_GAD_EXTMIN,(u32)&n);
        max=(Extent_t *)tag_GetTagData(taglist,TAG_GAD_EXTMAX,(u32)&x);
        space_get_extent(this,min,max);
        ret=0;
        break;
      }
      case GADEV_LAYOUT:
      case GADEV_DAMAGE:
      {
        Rect_t *rect,r;
        rect=(Rect_t *)tag_GetTagData(taglist,TAG_GAD_RECT,(u32)&r);
        space_layout(this,rect);
        ret=0;
        break;
      }
    }
  }

  debug_End();

  return(ret);
}


/*
 *  This function is called once before the creation of any Gadget_t of this
 *  class. Gadgets can be created only after this function has been called.
 */
static void init_space_class(u32 module)
{
  api->gadget_Call(GADGET_REGISTER_CLASS,
                            TAG_GADGET_CLASS_ID,CLASS_SPACE_ID,
                            TAG_GADGET_NAME,CLASS_SPACE_NAME,
                TAG_GADGET_BINDING,binding,
                TAG_GADGET_COLOR_NAMES,NULL,
                TAG_GADGET_CUSTOM_NAMES,NULL,
                TAG_GADGET_STATE_MASK,GADSTF_NORMAL,
                TAG_GADGET_MODULE,module,
                TAG_GADGET_GADGET_SIZE,sizeof(space),
                TAG_GADGET_METHODS,NULL,
                TAG_GADGET_INPUT_EVENT_HANDLER,NULL,
                TAG_GADGET_EVENT_HANDLER,NULL,
                TAG_GADGET_GADGET_EVENT_HANDLER,space_gadget_event_handler,
                TAG_DONE);
}


EXPORT int module_Init(u32 module, bases_Modules_t *bases)
{
    api=bases;
    init_space_class(module);  return(0);
}

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