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/***************************************************************************
gui_button.c - description
-------------------
begin : Wed Oct 16 2002
copyright : (C) 2002 by Michael Speck
email : kulkanie@gmx.net
***************************************************************************/
/***************************************************************************
* *
* 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. *
* *
***************************************************************************/
#include <stdlib.h>
#include <string.h>
#include "gui_widget.h"
#include "gui_button.h"
extern GuiTheme *gui_theme;
extern SDL_Surface *stk_display;
/*
====================================================================
LOCALS
====================================================================
*/
/*
====================================================================
Default event handler
====================================================================
*/
static void default_event_handler(
GuiWidget *widget, GuiEvent *event )
{
switch ( event->type ) {
case GUI_DESTROY:
break;
case GUI_DRAW:
/* the button surface provides for states in a
vertical order: normal, focused, clicked,
inactive */
if ( !widget->active ) {
stk_surface_blit( widget->surface,
0, (widget->screen_region.h<<1) +
widget->screen_region.h,
-1, widget->screen_region.h,
stk_display,
widget->screen_region.x,
widget->screen_region.y );
break;
}
if ( widget->focused ) {
if ( widget->pressed )
stk_surface_blit( widget->surface,
0, widget->screen_region.h<<1,
-1, widget->screen_region.h,
stk_display,
widget->screen_region.x,
widget->screen_region.y );
else
stk_surface_blit( widget->surface,
0, widget->screen_region.h,
-1, widget->screen_region.h,
stk_display,
widget->screen_region.x,
widget->screen_region.y );
}
else
stk_surface_blit( widget->surface, 0, 0,
-1, widget->screen_region.h,
stk_display,
widget->screen_region.x,
widget->screen_region.y );
break;
case GUI_BUTTON_PRESSED:
stk_sound_play( gui_theme->click_sound );
case GUI_ACTIVATED:
case GUI_DEACTIVATED:
case GUI_BUTTON_RELEASED:
case GUI_CLICKED:
case GUI_FOCUS_IN:
case GUI_FOCUS_OUT:
gui_widget_draw( widget );
break;
}
}
/*
====================================================================
PUBLICS
====================================================================
*/
/*
====================================================================
Create a button that may contain an icon and a text. Both are
displayed centered.
====================================================================
*/
GuiWidget* gui_button_create(
GuiWidget *parent, int x, int y, int width, int height,
void (*user_event_handler)(GuiWidget*,GuiEvent*),
SDL_Surface *icon, int ix, int iy, int iw, int ih,
char *caption )
{
int offset, i;
GuiWidget *widget = gui_widget_create(
parent, GUI_BUTTON, x, y, width, height,
default_event_handler, user_event_handler );
/* events */
gui_widget_enable_event( widget, GUI_CLICKED );
/* basic surface */
/* four different states in a vertical order:
NORMAL: normal wallpaper + normal button frame
FOCUSED: focus wallpaper + normal button frame
CLICKED: focus wallpaper + clicked button frame
INACTIVE: grayed NORMAL
*/
widget->surface = stk_surface_create(
SDL_SWSURFACE, width, height * 4 );
/* NORMAL */
stk_surface_apply_wallpaper(
widget->surface, 0,0,-1,height,
gui_theme->button_wallpaper_normal, -1 );
SDL_SetColorKey( widget->surface, 0,0 );
widget->border = stk_surface_apply_frame(
widget->surface, 0,0,-1,height,
gui_theme->button_frame_normal );
/* FOCUSED */
stk_surface_apply_wallpaper(
widget->surface, 0,height,-1,height,
gui_theme->button_wallpaper_focused, -1 );
stk_surface_apply_frame(
widget->surface, 0,height,-1,height,
gui_theme->button_frame_normal );
/* CLICKED */
stk_surface_apply_wallpaper(
widget->surface,
widget->border, widget->border + 2 * height,
-1,height,
gui_theme->button_wallpaper_focused, -1 );
stk_surface_apply_frame(
widget->surface, 0,2*height,-1,height,
gui_theme->button_frame_clicked );
/* INACTIVE */
stk_surface_apply_wallpaper(
widget->surface, 0,height*3,-1,height,
gui_theme->button_wallpaper_normal, -1 );
stk_surface_apply_frame(
widget->surface, 0,height*3,-1,height,
gui_theme->button_frame_normal );
stk_surface_gray( widget->surface,
0, height*3, width, height, 0 );
/* size w/o border */
widget->width -= 2 * widget->border;
widget->height -= 2 * widget->border;
/* add label and icon */
offset = width;
if ( icon )
offset -= iw;
if ( caption )
offset -= stk_font_string_width(
gui_theme->button_font, caption );
offset /= 2;
/* icon */
if ( icon ) {
for ( i = 0; i < 4; i++ )
stk_surface_alpha_blit( icon, ix, iy, iw, ih,
widget->surface,
offset + (i==2)*widget->border/2,
i * height + (height - ih) / 2 +
(i==2)*widget->border/2,
(i==3)?128:SDL_ALPHA_OPAQUE );
offset += iw;
}
if ( caption ) {
gui_theme->button_font->align = STK_FONT_ALIGN_CENTER_Y;
for ( i = 0; i < 4; i++ )
stk_font_write( gui_theme->button_font,
widget->surface,
offset + (i==2)*widget->border/2,
i * height + height / 2 +
(i==2)*widget->border/2,
(i==3)?128:SDL_ALPHA_OPAQUE, caption );
}
/* done */
return widget;
}
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