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