Added initial LBreakout2 sources, already slightly modified - it does not work yet!
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pelya
256
project/jni/application/lbreakout2/gui/gui_spinbutton.c
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256
project/jni/application/lbreakout2/gui/gui_spinbutton.c
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/***************************************************************************
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gui_spinbutton.c - description
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-------------------
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begin : Sat Oct 19 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_spinbutton.h"
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#include "gui_button.h"
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#include "gui_edit.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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break;
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}
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}
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/*
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====================================================================
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Handle edit and restrict input to digits and minus. Check range.
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The GUI_CHANGED event from the edit is blocked if an invalid
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character was added.
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====================================================================
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*/
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static void gui_spinbutton_edit_handler(
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GuiWidget *widget, GuiEvent *event )
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{
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char aux[GUI_SPINBUTTON_LENGTH + 1];
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int old_value;
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if ( event->type == GUI_CHANGED ) {
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old_value = widget->parent->spec.spinbutton.value;
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gui_edit_get_text( widget, aux,
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GUI_SPINBUTTON_LENGTH + 1, 0, -1 );
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widget->parent->spec.spinbutton.value = atoi( aux );
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/* check if we hit upper limit */
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if ( widget->parent->spec.spinbutton.value >
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widget->parent->spec.spinbutton.max ) {
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widget->parent->spec.spinbutton.value =
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widget->parent->spec.spinbutton.max;
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snprintf( aux, GUI_SPINBUTTON_LENGTH + 1,
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"%i", widget->parent->spec.spinbutton.value );
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gui_edit_set_text( widget, aux );
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}
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if ( old_value != widget->parent->spec.spinbutton.value )
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gui_widget_call_user_event_handler(
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widget->parent, event );
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}
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else
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gui_widget_call_user_event_handler(
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widget->parent, event );
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}
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/*
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====================================================================
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Handle increase/decrease buttons.
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====================================================================
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*/
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static void gui_spinbutton_inc_handler(
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GuiWidget *widget, GuiEvent *event )
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{
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if ( event->type == GUI_CLICKED )
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if ( widget->parent->spec.spinbutton.value <
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widget->parent->spec.spinbutton.max ) {
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widget->parent->spec.spinbutton.value +=
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widget->parent->spec.spinbutton.step;
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if ( widget->parent->spec.spinbutton.value >
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widget->parent->spec.spinbutton.max )
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widget->parent->spec.spinbutton.value =
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widget->parent->spec.spinbutton.max;
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gui_spinbutton_set_value( widget->parent,
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widget->parent->spec.spinbutton.value );
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gui_widget_call_user_event_handler(
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widget->parent,
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gui_event_get_simple( GUI_CHANGED ) );
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}
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gui_widget_call_user_event_handler( widget->parent, event );
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}
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static void gui_spinbutton_dec_handler(
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GuiWidget *widget, GuiEvent *event )
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{
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if ( event->type == GUI_CLICKED )
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if ( widget->parent->spec.spinbutton.value >
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widget->parent->spec.spinbutton.min ) {
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widget->parent->spec.spinbutton.value -=
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widget->parent->spec.spinbutton.step;
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if ( widget->parent->spec.spinbutton.value <
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widget->parent->spec.spinbutton.min )
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widget->parent->spec.spinbutton.value =
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widget->parent->spec.spinbutton.min;
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gui_spinbutton_set_value( widget->parent,
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widget->parent->spec.spinbutton.value );
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gui_widget_call_user_event_handler(
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widget->parent,
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gui_event_get_simple( GUI_CHANGED ) );
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}
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gui_widget_call_user_event_handler( widget->parent, event );
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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 spinbutton which is an alphanumerical edit with an
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increase and a decrease button both the size of height x height/2
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at the right end of the edit.
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====================================================================
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*/
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GuiWidget* gui_spinbutton_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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int min, int max, int step, int value )
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{
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GuiWidget *widget = gui_widget_create(
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parent, GUI_SPINBUTTON, 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_CHANGED );
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/* build empty surface */
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widget->surface = stk_surface_create(
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SDL_SWSURFACE, width, height );
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/* set range */
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widget->spec.spinbutton.min = min;
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widget->spec.spinbutton.max = max;
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widget->spec.spinbutton.step = step;
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/* build edit */
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widget->spec.spinbutton.edit = gui_edit_create(
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widget, 0, 0, width - height, height,
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gui_spinbutton_edit_handler, 2, 0,
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GUI_SPINBUTTON_LENGTH, "undefined" );
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gui_edit_set_filter(
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widget->spec.spinbutton.edit, GUI_EDIT_NUMERICAL );
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gui_widget_disable_event(
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widget->spec.spinbutton.edit, GUI_FOCUS_IN );
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gui_widget_disable_event(
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widget->spec.spinbutton.edit, GUI_FOCUS_OUT );
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/* by default edit can't be edited */
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widget->spec.spinbutton.edit->active = 0;
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/* build buttons */
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widget->spec.spinbutton.inc = gui_button_create(
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widget, width - height, 0, height, height / 2,
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gui_spinbutton_inc_handler,
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gui_theme->spinbutton_arrows, 0,0,
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gui_theme->spinbutton_arrow_size,
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gui_theme->spinbutton_arrow_size, 0 );
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gui_widget_disable_event(
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widget->spec.spinbutton.inc, GUI_FOCUS_IN );
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gui_widget_disable_event(
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widget->spec.spinbutton.inc, GUI_FOCUS_OUT );
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widget->spec.spinbutton.dec = gui_button_create(
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widget, width - height, height/2, height, height / 2,
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gui_spinbutton_dec_handler,
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gui_theme->spinbutton_arrows,
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gui_theme->spinbutton_arrow_size,0,
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gui_theme->spinbutton_arrow_size,
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gui_theme->spinbutton_arrow_size, 0 );
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gui_widget_disable_event(
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widget->spec.spinbutton.dec, GUI_FOCUS_IN );
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gui_widget_disable_event(
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widget->spec.spinbutton.dec, GUI_FOCUS_OUT );
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/* set value */
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gui_spinbutton_set_value( widget, value );
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/* done */
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return widget;
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}
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/*
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====================================================================
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Get/set spinbutton's value. Get returns False if this was no
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spinbutton.
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====================================================================
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*/
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void gui_spinbutton_set_value( GuiWidget *widget, int value )
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{
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char aux[GUI_SPINBUTTON_LENGTH + 1];
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if ( widget->type == GUI_SPINBUTTON ) {
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widget->spec.spinbutton.value = value;
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snprintf( aux, GUI_SPINBUTTON_LENGTH + 1, "%i", value );
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gui_edit_set_text( widget->spec.spinbutton.edit, aux );
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}
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}
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int gui_spinbutton_get_value( GuiWidget *widget, int *value )
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{
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if ( widget->type != GUI_SPINBUTTON )
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return 0;
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*value = widget->spec.spinbutton.value;
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if ( *value < widget->spec.spinbutton.min )
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*value = widget->spec.spinbutton.min;
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if ( *value > widget->spec.spinbutton.max )
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*value = widget->spec.spinbutton.max;
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return 1;
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}
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/*
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====================================================================
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Set the range of the spinbutton. Stores refresh rects if visible.
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-1 for any value means to keep the current setting.
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====================================================================
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*/
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int gui_spinbutton_set_range(
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GuiWidget *widget, int min, int max, int step )
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{
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if ( widget->type != GUI_SPINBUTTON )
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return 0;
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if ( min != -1 ) widget->spec.spinbutton.min = min;
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if ( max != -1 ) widget->spec.spinbutton.max = max;
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if ( step != -1 ) widget->spec.spinbutton.step = step;
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return 1;
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}
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/*
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====================================================================
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(De)Activate edit of spinbutton. If the entered value is greater
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than the maximum it is set to maximum. If it's less than minimum
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it is _not_ reset (else it would be impossible to enter new
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values) However, if the value is queried by
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gui_spinbutton_get_value() it is checked for its range.
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====================================================================
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*/
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void gui_spinbutton_enable_edit( GuiWidget *widget, int enable )
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{
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widget->spec.spinbutton.edit->active = enable;
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}
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