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/* ScummVM - Scumm Interpreter
* Copyright (C) 2005 The ScummVM project
*
* 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.
*
* $Header$
*/
#include "stdafx.h"
#include "gui/editable.h"
#include "gui/newgui.h"
namespace GUI {
EditableWidget::EditableWidget(GuiObject *boss, int x, int y, int w, int h)
: Widget(boss, x, y, w, h) {
_caretVisible = false;
_caretTime = 0;
_caretPos = 0; // FIXME
_caretInverse = false;
_editScrollOffset = 0;
}
EditableWidget::~EditableWidget() {
}
void EditableWidget::setEditString(const String &str) {
// TODO: We probably should filter the input string here,
// e.g. using tryInsertChar.
_editString = str;
_caretPos = _editString.size();
_editScrollOffset = (g_gui.getStringWidth(_editString) - (getEditRect().width()));
if (_editScrollOffset < 0)
_editScrollOffset = 0;
}
bool EditableWidget::tryInsertChar(char c, int pos) {
if (isprint(c)) {
_editString.insertChar(c, pos);
return true;
}
return false;
}
void EditableWidget::handleTickle() {
uint32 time = getMillis();
if (_caretTime < time) {
_caretTime = time + kCaretBlinkTime;
drawCaret(_caretVisible);
}
}
bool EditableWidget::handleKeyDown(uint16 ascii, int keycode, int modifiers) {
bool handled = true;
bool dirty = false;
// First remove caret
if (_caretVisible)
drawCaret(true);
switch (keycode) {
case '\n': // enter/return
case '\r':
// confirm edit and exit editmode
endEditMode();
dirty = true;
break;
case 27: // escape
abortEditMode();
dirty = true;
break;
case 8: // backspace
if (_caretPos > 0) {
_caretPos--;
_editString.deleteChar(_caretPos);
dirty = true;
}
break;
case 127: // delete
_editString.deleteChar(_caretPos);
dirty = true;
break;
case 256 + 20: // left arrow
if (_caretPos > 0) {
dirty = setCaretPos(_caretPos - 1);
}
break;
case 256 + 19: // right arrow
if (_caretPos < (int)_editString.size()) {
dirty = setCaretPos(_caretPos + 1);
}
break;
case 256 + 22: // home
dirty = setCaretPos(0);
break;
case 256 + 23: // end
dirty = setCaretPos(_editString.size());
break;
default:
if (tryInsertChar((char)ascii, _caretPos)) {
_caretPos++;
dirty = true;
} else {
handled = false;
}
}
if (dirty)
draw();
return handled;
}
int EditableWidget::getCaretOffset() const {
int caretpos = 0;
for (int i = 0; i < _caretPos; i++)
caretpos += g_gui.getCharWidth(_editString[i]);
caretpos -= _editScrollOffset;
return caretpos;
}
void EditableWidget::drawCaret(bool erase) {
// Only draw if item is visible
if (!isVisible() || !_boss->isVisible())
return;
int16 color = (erase ^ _caretInverse) ? g_gui._bgcolor : g_gui._textcolorhi;
int x = getEditRect().left;
int y = getEditRect().top;
x += getCaretOffset();
if (y < 0 || y + kLineHeight >= _h)
return;
x += getAbsX();
y += getAbsY();
g_gui.vLine(x, y, y + kLineHeight, color);
g_gui.addDirtyRect(x, y, 2, kLineHeight);
_caretVisible = !erase;
}
bool EditableWidget::setCaretPos(int newPos) {
assert(newPos >= 0 && newPos <= (int)_editString.size());
_caretPos = newPos;
return adjustOffset();
}
bool EditableWidget::adjustOffset() {
// check if the caret is still within the textbox; if it isn't,
// adjust _editScrollOffset
int caretpos = getCaretOffset();
const int editWidth = getEditRect().width();
if (caretpos < 0) {
// scroll left
_editScrollOffset += caretpos;
return true;
} else if (caretpos >= editWidth) {
// scroll right
_editScrollOffset -= (editWidth - caretpos);
return true;
} else if (_editScrollOffset > 0) {
const int strWidth = g_gui.getStringWidth(_editString);
if (strWidth - _editScrollOffset < editWidth) {
// scroll right
_editScrollOffset = (strWidth - editWidth);
if (_editScrollOffset < 0)
_editScrollOffset = 0;
}
}
return false;
}
} // End of namespace GUI
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