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