label.c

libminigui-1.3.0.tar.gz。 miniGUI的库函数源代码！

/*
** $Id: label.c,v 1.14 2003/11/21 02:45:53 weiym Exp $
**
** label.c: skin normal lable implementation.
**
** Copyright (C) 2003 Feynman Software.
**
** Current maintainer: Allen
**
** Create date: 2003-10-21 by Allen
*/

/*
**  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; either version 2 of the License, or
**  (at your option) any later version.
**
**  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
*/

/*
** TODO:
*/

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#ifdef __MINIGUI_LIB__
	#include "common.h"
	#include "minigui.h"
	#include "gdi.h"
	#include "window.h"
	#include "control.h"
	#include "mgext.h"
#else
	#include <minigui/common.h>
	#include <minigui/minigui.h>
	#include <minigui/gdi.h>
	#include <minigui/window.h>
	#include <minigui/control.h>
	#include <minigui/mgext.h>
#endif

#ifdef _EXT_SKIN

#include "skin.h"

#define EMPTY	""

/*type : si_nrmlabel_t or si_bmplabel_t */
#define DECL_LABEL(type,ret) \
    type *mylabel = (type *) item->type_data; \
    if (!mylabel) return ret;

static DWORD get_label (skin_item_t *item)
{
    DECL_LABEL ( si_nrmlabel_t, (DWORD)NULL );

    return (DWORD)mylabel->label;
}

#define NRM_MAX(a,b)   (a > b ? a : b)
static DWORD set_label (skin_item_t *item, DWORD label)
{
	HDC hdc;
	SIZE Size;
	RECT Rect;
	char new_label[1024] = {0};

    DECL_LABEL ( si_nrmlabel_t, (DWORD)FALSE );
	
	if ( (char *)label )	strcpy (new_label, (char *)label );

	/* new label's size */
	hdc = GetDC (item->hostskin->hwnd);
	SelectFont (hdc, (PLOGFONT)(&item->hostskin->fonts[mylabel->font_index]));
	GetTextExtent (hdc, new_label, strlen(new_label), &Size);
	ReleaseDC (hdc);

	/* Rect is the rect area that we should erase */
	memcpy (&Rect, &item->rc_hittest, sizeof(RECT) );
	Rect.right	= Rect.left + NRM_MAX( RECTW(Rect), Size.cx );
	Rect.bottom	= Rect.top  + NRM_MAX( RECTH(Rect), Size.cy );

	/* set new label */
	if (mylabel->label)	free (mylabel->label);
	mylabel->label = strdup (new_label);

	/* new label's hittest rect */
	item->rc_hittest.right	= item->rc_hittest.left + Size.cx;
	item->rc_hittest.bottom	= item->rc_hittest.top  + Size.cy;
	
	/* show new label */
	InvalidateRect ( item->hostskin->hwnd, &Rect, TRUE);

	/* we should refresh it's region also ... */

    return TRUE;
}

static int nrmlabel_on_create (skin_item_t* item)
{
	HDC hdc;
	SIZE Size;
    DECL_LABEL ( si_nrmlabel_t, 0 );

	/* init label's hittest rectangle  */
	hdc = GetDC (item->hostskin->hwnd);
	SelectFont (hdc, (PLOGFONT)(&item->hostskin->fonts[mylabel->font_index]));
	GetTextExtent (hdc, mylabel->label, strlen(mylabel->label), &Size);
	ReleaseDC (hdc);

	item->rc_hittest.right  = item->rc_hittest.left + Size.cx;
	item->rc_hittest.bottom = item->rc_hittest.top  + Size.cy;

    return 1;
}

static int nrmlabel_init (skin_head_t *skin, skin_item_t *item)
{
    DECL_LABEL ( si_nrmlabel_t, 0);

	mylabel->label = strdup ( mylabel->label ? mylabel->label : EMPTY );

    return 1;
}

static int nrmlabel_deinit (skin_item_t *item)
{
    DECL_LABEL ( si_nrmlabel_t, 0);

    if (mylabel->label) free (mylabel->label);

    return 1;
}

#define RGB_TO_PIXEL(hdc,color)	\
		RGB2Pixel (hdc, 		\
			GetRValue (color), 	\
			GetGValue (color), 	\
			GetBValue (color))
static void nrmlabel_draw_attached (HDC hdc, skin_item_t* item)
{
    gal_pixel text_color;
    si_nrmlabel_t *mylabel = (si_nrmlabel_t *) item->type_data;
	if ( !mylabel )	return;
    if ( !(&item->hostskin->fonts[mylabel->font_index]) || !mylabel->label )
        return;

    if (item->style & SI_STATUS_CLICKED) 
        text_color = RGB_TO_PIXEL(hdc, mylabel->color_click);
    else if (item->style & SI_STATUS_HILIGHTED) 
        text_color = RGB_TO_PIXEL(hdc, mylabel->color_focus);
    else 
        text_color = RGB_TO_PIXEL(hdc, mylabel->color);

    SetTextColor (hdc, text_color);
    SetBkMode (hdc, BM_TRANSPARENT);
    SelectFont (hdc, (PLOGFONT)(&item->hostskin->fonts[mylabel->font_index]));
    DrawText (hdc, mylabel->label, -1, &(item->rc_hittest), DT_LEFT | DT_VCENTER | DT_SINGLELINE);
}

static skin_item_ops_t nrmlabel_ops = {
    nrmlabel_init,
    nrmlabel_deinit,
    nrmlabel_on_create ,
    NULL,
    NULL,
    nrmlabel_draw_attached,
    get_label,
    set_label,
    NULL
};

skin_item_ops_t *NRMLABEL_OPS = &nrmlabel_ops;

#endif /* _EXT_SKIN */