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gadget_SysDrag.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
 *
 */
/*
 *  sys_drag.c
 *
 *  Author            : Gergely Gáti
 *  Date              :
 *  Description       :
 *
 */
#include <stdlib.h>
#include <string.h>

#include "gadgets/gadget_SysDrag.h"

#include "debug.h"
#include "classes.h"
#include "Memory.h"
#include "Common.h"
#include "Bases.h"
#include "Module.h"
#include "Window.h"


struct _sys_drag
{
  Gadget_t gadget;
  char *title;
  int optimal;
};


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


static u32 sys_drag_set_title(Gadget_t *this_gadget, tag *taglist);

static gadget_Method_t methods[]=
{
  {"set_title",sys_drag_set_title,0L},
  GADGET_METHOD_DONE
};


static gadget_Binding_t binding[]=
{
  {"title",TAG_SSZ_TITLE,GADGET_STRING,""},
  {"optimal",TAG_SSZ_OPTIMAL,GADGET_INT,NULL},
  GADGET_BINDING_DONE
};

static char *color_names[]=
{
  "text",
  NULL
};


/*
 *  This function is always called after the Gadget_t has been created and
 *  attached to the Gadget_t tree, but before the call to sys_drag_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 sys_drag_get_extent(Gadget_t *this, Extent_t *min, Extent_t *max)
{
  debug_Begin();

  if(((sys_drag *)this)->title!=NULL)
  {
    min->width=2;
    min->height=api->glw_Call(GLW_GETFONTSIZE,TAG_GLW_FONT,api->gadget_Call(GADGET_GET_FONT,TAG_GADGET_OBJECT,this,TAG_DONE),TAG_DONE);
    max->width=(((sys_drag *)this)->optimal<=1?GADGET_MAXIMUM_SIZE:((sys_drag *)this)->optimal);
    max->height=min->height;
  }
  else
  {
    min->width=1;
    min->height=1;
    max->width=GADGET_MAXIMUM_SIZE;
    max->height=GADGET_MAXIMUM_SIZE;
  }

  debug_End();
}


/*
 *  This function is called always after sys_drag_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
 *  sys_drag_get_extent() of the same gadget. After this call the Gadget_t is made
 *  visible.
 */
static void sys_drag_layout(Gadget_t *this, Rect_t *rect)
{
  debug_Begin();

//  glw_SetColor(this->window->handle, 0x6182ae);
//  glw_DrawFilledRect(this->window->handle,rect->left,rect->top,rect->width,rect->height);
  if(((sys_drag *)this)->title!=NULL)
  {
    Rect_t rct;
    rct.left=rect->left;
    rct.top=rect->top;
    rct.width=rect->width;
    rct.height=rect->height;
    api->glw_Call(GLW_SETCOLOR,TAG_GLW_WINDOW,this->window->handle,TAG_GLW_RGB, api->gadget_Call(GADGET_GET_COLOR,TAG_GADGET_OBJECT,this,TAG_GADGET_COLOR,SSZ_COL_TEXT,TAG_DONE));
    api->glw_Call(GLW_DRAWTEXT,TAG_GLW_WINDOW,this->window->handle,TAG_GLW_CLIPRECT,&rct,TAG_GLW_FONT,api->gadget_Call(GADGET_GET_FONT,TAG_GADGET_OBJECT,this,TAG_DONE),TAG_GLW_TEXT,((sys_drag *)this)->title,TAG_GLW_FLAGS,0L,TAG_DONE);
  }
/*
  glw_SetColor(this->window->handle, 0xefefef);
  glw_DrawLine(this->window->handle,rect->left,rect->top,rect->left+rect->width-1,rect->top);
  glw_DrawLine(this->window->handle,rect->left,rect->top,rect->left,rect->top+rect->height-1);
  glw_SetColor(this->window->handle, 0x000000);
  glw_DrawLine(this->window->handle,rect->left,rect->top+rect->height-1,rect->left+rect->width-1,rect->top+rect->height-1);
  glw_DrawLine(this->window->handle,rect->left+rect->width-1,rect->top,rect->left+rect->width-1,rect->top+rect->height-1);
*/

  debug_End();
}


static int sys_drag_input_event_handler(Gadget_t *gad, struct glw_Event *event)
{
  debug_Begin();

  switch(event->event)
  {
    case GLWEV_MOUSEBUTTONS:
    {
      switch(event->data)
      {
        case GLWEVD_LEFTDOWN:
        {
          api->glw_Call(GLW_DRAGWINDOW,TAG_GLW_WINDOW,gad->window->handle,TAG_DONE);
          break;
        }
        case GLWEVD_LEFTUP:
        {
          break;
        }
      }
      break;
    }
  }

  debug_End();

  return(0);
}


static int sys_drag_init_gadget(Gadget_t *this, tag *taglist)
{
  int ret=-1;
  char *title;

  debug_Begin();

  title=(char *)tag_GetTagData(taglist,TAG_SSZ_TITLE,0L);
  if(title!=NULL) ((sys_drag *)this)->title=common_strdup(title);
  else ((sys_drag *)this)->title=NULL;
  ((sys_drag *)this)->optimal=(int)tag_GetTagData(taglist,TAG_SSZ_OPTIMAL,0L);
  ret=0;

  debug_End();

  return(ret);
}


static void sys_drag_delete_gadget(Gadget_t *this)
{
  debug_Begin();

  if(((sys_drag *)this)->title!=NULL) mem_free(((sys_drag *)this)->title);

  debug_End();
}


static u32 sys_drag_set_title(Gadget_t *this_gadget, tag *taglist)
{
  u32 ret=~0;
  char *new_title;
  u32 font;

  debug_Begin();

  new_title=common_strdup((char *)tag_GetTagData(taglist,TAG_SSZ_TITLE,(u32)""));
  if(new_title!=NULL)
  {
    if(((sys_drag *)this_gadget)->title!=NULL) mem_free(((sys_drag *)this_gadget)->title);
    ((sys_drag *)this_gadget)->title=new_title;
    if(((sys_drag *)this_gadget)->optimal>0)
    {
      font=api->gadget_Call(GADGET_GET_FONT,TAG_GADGET_OBJECT,this_gadget,TAG_DONE);
      ((sys_drag *)this_gadget)->optimal=4+api->glw_Call(GLW_GETTEXTLENGTH,TAG_GLW_FONT,font,TAG_GLW_TEXT,new_title,TAG_DONE);
    }
    api->gadget_Call(GADGET_REFRESH,TAG_GADGET_OBJECT,api->gadget_Call(GADGET_FATHER,TAG_GADGET_OBJECT,this_gadget,TAG_DONE),TAG_DONE);
  }

  debug_End();

  return(ret);
}


static int sys_drag_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=sys_drag_init_gadget(this,taglist);
        break;
      }
      case GADEV_DELETE_GADGET:
      {
        sys_drag_delete_gadget(this);
        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);
        sys_drag_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);
        sys_drag_layout(this,rect);
        ret=0;
        break;
      }
      case GADEV_SAVE:
      {
        u8 **mem;
        int *size;
        mem=(u8 **)tag_GetTagData(taglist,TAG_GADGET_MEM,0L);
        size=(int *)tag_GetTagData(taglist,TAG_GADGET_SIZE,0L);
        break;
      }
      case GADEV_RESTORE:
      {
        u8 *mem;
        int size;
        mem=(u8 *)tag_GetTagData(taglist,TAG_GADGET_MEM,0L);
        size=(int)tag_GetTagData(taglist,TAG_GADGET_SIZE,0L);
        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_sys_drag_class(u32 module)
{
  api->gadget_Call(GADGET_REGISTER_CLASS,
                            TAG_GADGET_CLASS_ID,CLASS_SYS_DRAG_ID,
                            TAG_GADGET_NAME,CLASS_SYS_DRAG_NAME,
                TAG_GADGET_BINDING,binding,
                TAG_GADGET_COLOR_NAMES,color_names,
                TAG_GADGET_CUSTOM_NAMES,NULL,
                TAG_GADGET_STATE_MASK,GADSTF_NORMAL,
                TAG_GADGET_MODULE,module,
                TAG_GADGET_GADGET_SIZE,sizeof(sys_drag),
                TAG_GADGET_METHODS,methods,
                TAG_GADGET_INPUT_EVENT_HANDLER,sys_drag_input_event_handler,
                TAG_GADGET_EVENT_HANDLER,NULL,
                TAG_GADGET_GADGET_EVENT_HANDLER,sys_drag_gadget_event_handler,
                TAG_DONE);
}


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

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