ref: 9db0c9c6444dcb2aa4541466caf6b184030683ca
dir: /textscreen/txt_inputbox.c/
// Emacs style mode select -*- C++ -*-
//-----------------------------------------------------------------------------
//
// Copyright(C) 2006 Simon Howard
//
// 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.
//
#include <ctype.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "doomkeys.h"
#include "txt_inputbox.h"
#include "txt_gui.h"
#include "txt_io.h"
#include "txt_main.h"
#include "txt_window.h"
extern txt_widget_class_t txt_inputbox_class;
extern txt_widget_class_t txt_int_inputbox_class;
static void SetBufferFromValue(txt_inputbox_t *inputbox)
{
if (inputbox->widget.widget_class == &txt_inputbox_class)
{
char **value = (char **) inputbox->value;
if (*value != NULL)
{
strncpy(inputbox->buffer, *value, inputbox->size);
inputbox->buffer[inputbox->size] = '\0';
}
else
{
strcpy(inputbox->buffer, "");
}
}
else if (inputbox->widget.widget_class == &txt_int_inputbox_class)
{
int *value = (int *) inputbox->value;
sprintf(inputbox->buffer, "%i", *value);
}
}
static void StartEditing(txt_inputbox_t *inputbox)
{
// Integer input boxes start from an empty buffer:
if (inputbox->widget.widget_class == &txt_int_inputbox_class)
{
strcpy(inputbox->buffer, "");
}
else
{
SetBufferFromValue(inputbox);
}
inputbox->editing = 1;
}
static void FinishEditing(txt_inputbox_t *inputbox)
{
if (!inputbox->editing)
{
return;
}
// Save the new value back to the variable.
if (inputbox->widget.widget_class == &txt_inputbox_class)
{
free(*((char **)inputbox->value));
*((char **) inputbox->value) = strdup(inputbox->buffer);
}
else if (inputbox->widget.widget_class == &txt_int_inputbox_class)
{
*((int *) inputbox->value) = atoi(inputbox->buffer);
}
TXT_EmitSignal(&inputbox->widget, "changed");
inputbox->editing = 0;
}
static void TXT_InputBoxSizeCalc(TXT_UNCAST_ARG(inputbox))
{
TXT_CAST_ARG(txt_inputbox_t, inputbox);
// Enough space for the box + cursor
inputbox->widget.w = inputbox->size + 1;
inputbox->widget.h = 1;
}
static void TXT_InputBoxDrawer(TXT_UNCAST_ARG(inputbox))
{
TXT_CAST_ARG(txt_inputbox_t, inputbox);
int focused;
int i;
int chars;
int w;
focused = inputbox->widget.focused;
w = inputbox->widget.w;
// Select the background color based on whether we are currently
// editing, and if not, whether the widget is focused.
if (inputbox->editing && focused)
{
TXT_BGColor(TXT_COLOR_BLACK, 0);
}
else
{
TXT_SetWidgetBG(inputbox);
}
TXT_FGColor(TXT_COLOR_BRIGHT_WHITE);
if (!inputbox->editing)
{
// If not editing, use the current value from inputbox->value.
SetBufferFromValue(inputbox);
}
TXT_DrawString(inputbox->buffer);
chars = strlen(inputbox->buffer);
if (chars < w && inputbox->editing && focused)
{
TXT_BGColor(TXT_COLOR_BLACK, 1);
TXT_DrawString("_");
++chars;
}
for (i=chars; i < w; ++i)
{
TXT_DrawString(" ");
}
}
static void TXT_InputBoxDestructor(TXT_UNCAST_ARG(inputbox))
{
TXT_CAST_ARG(txt_inputbox_t, inputbox);
free(inputbox->buffer);
}
static void Backspace(txt_inputbox_t *inputbox)
{
if (strlen(inputbox->buffer) > 0)
{
inputbox->buffer[strlen(inputbox->buffer) - 1] = '\0';
}
}
static void AddCharacter(txt_inputbox_t *inputbox, int key)
{
if (strlen(inputbox->buffer) < inputbox->size)
{
// Add character to the buffer
inputbox->buffer[strlen(inputbox->buffer) + 1] = '\0';
inputbox->buffer[strlen(inputbox->buffer)] = key;
}
}
static int TXT_InputBoxKeyPress(TXT_UNCAST_ARG(inputbox), int key)
{
TXT_CAST_ARG(txt_inputbox_t, inputbox);
if (!inputbox->editing)
{
if (key == KEY_ENTER)
{
StartEditing(inputbox);
return 1;
}
return 0;
}
if (key == KEY_ENTER)
{
FinishEditing(inputbox);
}
if (key == KEY_ESCAPE)
{
inputbox->editing = 0;
}
if (isprint(key))
{
// Add character to the buffer
AddCharacter(inputbox, key);
}
if (key == KEY_BACKSPACE)
{
Backspace(inputbox);
}
return 1;
}
static void TXT_InputBoxMousePress(TXT_UNCAST_ARG(inputbox),
int x, int y, int b)
{
TXT_CAST_ARG(txt_inputbox_t, inputbox);
if (b == TXT_MOUSE_LEFT)
{
// Make mouse clicks start editing the box
if (!inputbox->editing)
{
// Send a simulated keypress to start editing
TXT_WidgetKeyPress(inputbox, KEY_ENTER);
}
}
}
static void TXT_InputBoxFocused(TXT_UNCAST_ARG(inputbox), int focused)
{
TXT_CAST_ARG(txt_inputbox_t, inputbox);
// Stop editing when we lose focus.
if (inputbox->editing && !focused)
{
FinishEditing(inputbox);
}
}
txt_widget_class_t txt_inputbox_class =
{
TXT_AlwaysSelectable,
TXT_InputBoxSizeCalc,
TXT_InputBoxDrawer,
TXT_InputBoxKeyPress,
TXT_InputBoxDestructor,
TXT_InputBoxMousePress,
NULL,
TXT_InputBoxFocused,
};
txt_widget_class_t txt_int_inputbox_class =
{
TXT_AlwaysSelectable,
TXT_InputBoxSizeCalc,
TXT_InputBoxDrawer,
TXT_InputBoxKeyPress,
TXT_InputBoxDestructor,
TXT_InputBoxMousePress,
NULL,
TXT_InputBoxFocused,
};
txt_inputbox_t *TXT_NewInputBox(char **value, int size)
{
txt_inputbox_t *inputbox;
inputbox = malloc(sizeof(txt_inputbox_t));
TXT_InitWidget(inputbox, &txt_inputbox_class);
inputbox->value = value;
inputbox->size = size;
inputbox->buffer = malloc(size + 1);
inputbox->editing = 0;
return inputbox;
}
txt_inputbox_t *TXT_NewIntInputBox(int *value, int size)
{
txt_inputbox_t *inputbox;
inputbox = malloc(sizeof(txt_inputbox_t));
TXT_InitWidget(inputbox, &txt_int_inputbox_class);
inputbox->value = value;
inputbox->size = size;
inputbox->buffer = malloc(15);
inputbox->editing = 0;
return inputbox;
}