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/* ScummVM - Scumm Interpreter
* Copyright (C) 2002-2006 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* $URL$
* $Id$
*/
#include "common/stdafx.h"
#include "common/system.h"
#include "gui/ListWidget.h"
#include "gui/ScrollBarWidget.h"
#include "gui/dialog.h"
#include "gui/eval.h"
#include "gui/newgui.h"
namespace GUI {
ListWidget::ListWidget(GuiObject *boss, String name)
: EditableWidget(boss, name), CommandSender(boss) {
WidgetSize ws = g_gui.getWidgetSize();
_leftPadding = g_gui.evaluator()->getVar("ListWidget.leftPadding", 0);
_rightPadding = g_gui.evaluator()->getVar("ListWidget.rightPadding", 0);
_topPadding = g_gui.evaluator()->getVar("ListWidget.topPadding", 0);
_bottomPadding = g_gui.evaluator()->getVar("ListWidget.bottomPadding", 0);
_hlLeftPadding = g_gui.evaluator()->getVar("ListWidget.hlLeftPadding", 0);
_hlRightPadding = g_gui.evaluator()->getVar("ListWidget.hlRightPadding", 0);
int scrollBarWidth;
if (ws == kBigWidgetSize) {
scrollBarWidth = kBigScrollBarWidth;
} else {
scrollBarWidth = kNormalScrollBarWidth;
}
_scrollBar = new ScrollBarWidget(this, _w - scrollBarWidth, 0, scrollBarWidth, _h);
_scrollBar->setTarget(this);
_flags = WIDGET_ENABLED | WIDGET_CLEARBG | WIDGET_RETAIN_FOCUS | WIDGET_WANT_TICKLE;
setHints(THEME_HINT_SAVE_BACKGROUND);
_type = kListWidget;
_editMode = false;
_numberingMode = kListNumberingOne;
_entriesPerPage = (_h - _topPadding - _bottomPadding) / kLineHeight;
_currentPos = 0;
_selectedItem = -1;
_currentKeyDown = 0;
_quickSelectTime = 0;
// The item is selected, thus _bgcolor is used to draw the caret and _textcolorhi to erase it
_caretInverse = true;
// FIXME: This flag should come from widget definition
_editable = true;
_textWidth = new int[_entriesPerPage];
for (int i = 0; i < _entriesPerPage; i++)
_textWidth[i] = 0;
}
ListWidget::~ListWidget() {
delete[] _textWidth;
}
void ListWidget::setSelected(int item) {
assert(item >= -1 && item < (int)_list.size());
if (isEnabled() && _selectedItem != item) {
if (_editMode)
abortEditMode();
_selectedItem = item;
sendCommand(kListSelectionChangedCmd, _selectedItem);
_currentPos = _selectedItem - _entriesPerPage / 2;
scrollToCurrent();
draw();
}
}
void ListWidget::setList(const StringList &list) {
if (_editMode && _caretVisible)
drawCaret(true);
int size = list.size();
_list = list;
if (_currentPos >= size)
_currentPos = size - 1;
if (_currentPos < 0)
_currentPos = 0;
_selectedItem = -1;
_editMode = false;
g_system->setFeatureState(OSystem::kFeatureVirtualKeyboard, false);
scrollBarRecalc();
}
void ListWidget::scrollTo(int item) {
int size = _list.size();
if (item >= size)
item = size - 1;
if (item < 0)
item = 0;
if (_currentPos != item) {
_currentPos = item;
scrollBarRecalc();
}
}
void ListWidget::scrollBarRecalc() {
_scrollBar->_numEntries = _list.size();
_scrollBar->_entriesPerPage = _entriesPerPage;
_scrollBar->_currentPos = _currentPos;
_scrollBar->recalc();
}
void ListWidget::handleTickle() {
if (_editMode)
EditableWidget::handleTickle();
}
void ListWidget::handleMouseDown(int x, int y, int button, int clickCount) {
if (!isEnabled())
return;
// First check whether the selection changed
int newSelectedItem;
newSelectedItem = findItem(x, y);
if (newSelectedItem > (int)_list.size() - 1)
newSelectedItem = -1;
if (_selectedItem != newSelectedItem) {
if (_editMode)
abortEditMode();
_selectedItem = newSelectedItem;
sendCommand(kListSelectionChangedCmd, _selectedItem);
}
// TODO: Determine where inside the string the user clicked and place the
// caret accordingly. See _editScrollOffset and EditTextWidget::handleMouseDown.
draw();
}
void ListWidget::handleMouseUp(int x, int y, int button, int clickCount) {
// If this was a double click and the mouse is still over the selected item,
// send the double click command
if (clickCount == 2 && (_selectedItem == findItem(x, y))) {
sendCommand(kListItemDoubleClickedCmd, _selectedItem);
}
}
void ListWidget::handleMouseWheel(int x, int y, int direction) {
_scrollBar->handleMouseWheel(x, y, direction);
}
int ListWidget::findItem(int x, int y) const {
return (y - _topPadding) / kLineHeight + _currentPos;
}
static int matchingCharsIgnoringCase(const char *x, const char *y, bool &stop) {
int match = 0;
while (*x && *y && toupper(*x) == toupper(*y)) {
++x;
++y;
++match;
}
stop = !*y || (*x && (toupper(*x) >= toupper(*y)));
return match;
}
bool ListWidget::handleKeyDown(uint16 ascii, int keycode, int modifiers) {
bool handled = true;
bool dirty = false;
int oldSelectedItem = _selectedItem;
if (!_editMode && isprint((char)ascii)) {
// Quick selection mode: Go to first list item starting with this key
// (or a substring accumulated from the last couple key presses).
// Only works in a useful fashion if the list entries are sorted.
// TODO: Maybe this should be off by default, and instead we add a
// method "enableQuickSelect()" or so ?
uint32 time = getMillis();
if (_quickSelectTime < time) {
_quickSelectStr = (char)ascii;
} else {
_quickSelectStr += (char)ascii;
}
_quickSelectTime = time + 300; // TODO: Turn this into a proper constant (kQuickSelectDelay ?)
// FIXME: This is bad slow code (it scans the list linearly each time a
// key is pressed); it could be much faster. Only of importance if we have
// quite big lists to deal with -- so for now we can live with this lazy
// implementation :-)
int newSelectedItem = 0;
int bestMatch = 0;
bool stop;
for (StringList::const_iterator i = _list.begin(); i != _list.end(); ++i) {
const int match = matchingCharsIgnoringCase(i->c_str(), _quickSelectStr.c_str(), stop);
if (match > bestMatch || stop) {
_selectedItem = newSelectedItem;
bestMatch = match;
if (stop)
break;
}
newSelectedItem++;
}
scrollToCurrent();
} else if (_editMode) {
// Class EditableWidget handles all text editing related key presses for us
handled = EditableWidget::handleKeyDown(ascii, keycode, modifiers);
} else {
// not editmode
switch (keycode) {
case '\n': // enter/return
case '\r':
if (_selectedItem >= 0) {
// override continuous enter keydown
if (_editable && (_currentKeyDown != '\n' && _currentKeyDown != '\r')) {
dirty = true;
startEditMode();
} else
sendCommand(kListItemActivatedCmd, _selectedItem);
}
break;
case 256+17: // up arrow
if (_selectedItem > 0)
_selectedItem--;
break;
case 256+18: // down arrow
if (_selectedItem < (int)_list.size() - 1)
_selectedItem++;
break;
case 256+24: // pageup
_selectedItem -= _entriesPerPage - 1;
if (_selectedItem < 0)
_selectedItem = 0;
break;
case 256+25: // pagedown
_selectedItem += _entriesPerPage - 1;
if (_selectedItem >= (int)_list.size() )
_selectedItem = _list.size() - 1;
break;
case 256+22: // home
_selectedItem = 0;
break;
case 256+23: // end
_selectedItem = _list.size() - 1;
break;
default:
handled = false;
}
scrollToCurrent();
}
if (dirty || _selectedItem != oldSelectedItem)
draw();
if (_selectedItem != oldSelectedItem) {
sendCommand(kListSelectionChangedCmd, _selectedItem);
// also draw scrollbar
_scrollBar->draw();
}
#if !defined(PALMOS_MODE)
// not done on PalmOS because keyboard is emulated and keyup is not generated
_currentKeyDown = keycode;
#endif
return handled;
}
bool ListWidget::handleKeyUp(uint16 ascii, int keycode, int modifiers) {
if (keycode == _currentKeyDown)
_currentKeyDown = 0;
return true;
}
void ListWidget::lostFocusWidget() {
// If we loose focus, we simply forget the user changes
_editMode = false;
g_system->setFeatureState(OSystem::kFeatureVirtualKeyboard, false);
drawCaret(true);
draw();
}
void ListWidget::handleCommand(CommandSender *sender, uint32 cmd, uint32 data) {
switch (cmd) {
case kSetPositionCmd:
if (_currentPos != (int)data) {
_currentPos = data;
draw();
}
break;
}
}
void ListWidget::drawWidget(bool hilite) {
int i, pos, len = _list.size();
Common::String buffer;
// Draw a thin frame around the list.
g_gui.theme()->drawWidgetBackground(Common::Rect(_x, _y, _x + _w, _y + _h), _hints, Theme::kWidgetBackgroundBorder);
// Draw the list items
for (i = 0, pos = _currentPos; i < _entriesPerPage && pos < len; i++, pos++) {
const int y = _y + _topPadding + kLineHeight * i;
const int fontHeight = kLineHeight;
bool inverted = false;
// Draw the selected item inverted, on a highlighted background.
if (_selectedItem == pos) {
if (_hasFocus)
inverted = true;
else
g_gui.theme()->drawWidgetBackground(Common::Rect(_x, y - 1, _x + _w - 1, y + fontHeight - 1), _hints, Theme::kWidgetBackgroundBorderSmall);
}
Common::Rect r(getEditRect());
int pad = _leftPadding;
// If in numbering mode, we first print a number prefix
if (_numberingMode != kListNumberingOff) {
char temp[10];
sprintf(temp, "%2d. ", (pos + _numberingMode));
buffer = temp;
g_gui.theme()->drawText(Common::Rect(_x, y, _x + r.left + _leftPadding, y + fontHeight - 1), buffer, Theme::kStateEnabled, Theme::kTextAlignLeft, inverted, _leftPadding);
pad = 0;
}
int width;
if (_selectedItem == pos && _editMode) {
buffer = _editString;
adjustOffset();
width = _w - r.left - _hlRightPadding - _leftPadding - _rightPadding;
g_gui.theme()->drawText(Common::Rect(_x + r.left, y, _x + r.left + width, y + fontHeight - 1), buffer, Theme::kStateEnabled, Theme::kTextAlignLeft, inverted, pad);
} else {
int maxWidth = _textWidth[i];
buffer = _list[pos];
if (_selectedItem != pos) {
width = g_gui.getStringWidth(buffer) + pad;
if (width > _w - r.left)
width = _w - r.left;
} else
width = _w - r.left - _hlRightPadding;
if (width > maxWidth)
maxWidth = width;
g_gui.theme()->drawText(Common::Rect(_x + r.left, y, _x + r.left + maxWidth, y + fontHeight - 1), buffer, Theme::kStateEnabled, Theme::kTextAlignLeft, inverted, pad);
}
_textWidth[i] = width;
}
}
Common::Rect ListWidget::getEditRect() const {
Common::Rect r(_hlLeftPadding, 0, _w - _hlLeftPadding - _hlRightPadding, kLineHeight - 1);
const int offset = (_selectedItem - _currentPos) * kLineHeight + _topPadding;
r.top += offset;
r.bottom += offset;
if (_numberingMode != kListNumberingOff) {
char temp[10];
// FIXME: Assumes that all digits have the same width.
sprintf(temp, "%2d. ", (_list.size() - 1 + _numberingMode));
r.left += g_gui.getStringWidth(temp) + _leftPadding;
}
return r;
}
void ListWidget::scrollToCurrent() {
// Only do something if the current item is not in our view port
if (_selectedItem < _currentPos) {
// it's above our view
_currentPos = _selectedItem;
} else if (_selectedItem >= _currentPos + _entriesPerPage ) {
// it's below our view
_currentPos = _selectedItem - _entriesPerPage + 1;
}
if (_currentPos < 0 || _entriesPerPage > (int)_list.size())
_currentPos = 0;
else if (_currentPos + _entriesPerPage > (int)_list.size())
_currentPos = _list.size() - _entriesPerPage;
_scrollBar->_currentPos = _currentPos;
_scrollBar->recalc();
}
void ListWidget::startEditMode() {
if (_editable && !_editMode && _selectedItem >= 0) {
_editMode = true;
setEditString(_list[_selectedItem]);
draw();
g_system->setFeatureState(OSystem::kFeatureVirtualKeyboard, true);
}
}
void ListWidget::endEditMode() {
if (!_editMode)
return;
// send a message that editing finished with a return/enter key press
_editMode = false;
_list[_selectedItem] = _editString;
g_system->setFeatureState(OSystem::kFeatureVirtualKeyboard, false);
sendCommand(kListItemActivatedCmd, _selectedItem);
}
void ListWidget::abortEditMode() {
// undo any changes made
assert(_selectedItem >= 0);
_editMode = false;
//drawCaret(true);
//draw();
g_system->setFeatureState(OSystem::kFeatureVirtualKeyboard, false);
}
void ListWidget::handleScreenChanged() {
Widget::handleScreenChanged();
int w = g_gui.evaluator()->getVar(_name + ".w");
WidgetSize ws = g_gui.getWidgetSize();
_leftPadding = g_gui.evaluator()->getVar("ListWidget.leftPadding", 0);
_rightPadding = g_gui.evaluator()->getVar("ListWidget.rightPadding", 0);
_topPadding = g_gui.evaluator()->getVar("ListWidget.topPadding", 0);
_bottomPadding = g_gui.evaluator()->getVar("ListWidget.bottomPadding", 0);
_hlLeftPadding = g_gui.evaluator()->getVar("ListWidget.hlLeftPadding", 0);
_hlRightPadding = g_gui.evaluator()->getVar("ListWidget.hlRightPadding", 0);
int scrollBarWidth;
if (ws == kBigWidgetSize) {
scrollBarWidth = kBigScrollBarWidth;
} else {
scrollBarWidth = kNormalScrollBarWidth;
}
_entriesPerPage = (_h - _topPadding - _bottomPadding) / kLineHeight;
delete [] _textWidth;
_textWidth = new int[_entriesPerPage];
for (int i = 0; i < _entriesPerPage; i++)
_textWidth[i] = 0;
_scrollBar->resize(_w - scrollBarWidth, 0, scrollBarWidth, _h);
scrollBarRecalc();
}
} // End of namespace GUI
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