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|
/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* 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.
*
*/
#include "common/system.h"
#include "common/frac.h"
#include "common/tokenizer.h"
#include "gui/widgets/list.h"
#include "gui/widgets/scrollbar.h"
#include "gui/dialog.h"
#include "gui/gui-manager.h"
#include "gui/ThemeEval.h"
namespace GUI {
ListWidget::ListWidget(Dialog *boss, const String &name, const char *tooltip, uint32 cmd)
: EditableWidget(boss, name, tooltip), _cmd(cmd) {
_entriesPerPage = 0;
_scrollBar = new ScrollBarWidget(this, _w - _scrollBarWidth, 0, _scrollBarWidth, _h);
_scrollBar->setTarget(this);
setFlags(WIDGET_ENABLED | WIDGET_CLEARBG | WIDGET_RETAIN_FOCUS | WIDGET_WANT_TICKLE | WIDGET_TRACK_MOUSE);
_type = kListWidget;
_editMode = false;
_numberingMode = kListNumberingOne;
_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;
_quickSelect = true;
_editColor = ThemeEngine::kFontColorNormal;
_lastRead = -1;
}
ListWidget::ListWidget(Dialog *boss, int x, int y, int w, int h, const char *tooltip, uint32 cmd)
: EditableWidget(boss, x, y, w, h, tooltip), _cmd(cmd) {
_entriesPerPage = 0;
_scrollBar = new ScrollBarWidget(this, _w - _scrollBarWidth, 0, _scrollBarWidth, _h);
_scrollBar->setTarget(this);
setFlags(WIDGET_ENABLED | WIDGET_CLEARBG | WIDGET_RETAIN_FOCUS | WIDGET_WANT_TICKLE);
_type = kListWidget;
_editMode = false;
_numberingMode = kListNumberingOne;
_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;
_quickSelect = true;
_editColor = ThemeEngine::kFontColorNormal;
_lastRead = -1;
}
bool ListWidget::containsWidget(Widget *w) const {
if (w == _scrollBar || _scrollBar->containsWidget(w))
return true;
return false;
}
Widget *ListWidget::findWidget(int x, int y) {
if (x >= _w - _scrollBarWidth)
return _scrollBar;
return this;
}
void ListWidget::setSelected(int item) {
// HACK/FIXME: If our _listIndex has a non zero size,
// we will need to look up, whether the user selected
// item is present in that list
if (_listIndex.size()) {
int filteredItem = -1;
for (uint i = 0; i < _listIndex.size(); ++i) {
if (_listIndex[i] == item) {
filteredItem = i;
break;
}
}
item = filteredItem;
}
assert(item >= -1 && item < (int)_list.size());
// We only have to do something if the widget is enabled and the selection actually changes
if (isEnabled() && _selectedItem != item) {
if (_editMode)
abortEditMode();
_selectedItem = item;
// Notify clients that the selection changed.
sendCommand(kListSelectionChangedCmd, _selectedItem);
_currentPos = _selectedItem - _entriesPerPage / 2;
scrollToCurrent();
markAsDirty();
}
}
ThemeEngine::FontColor ListWidget::getSelectionColor() const {
if (_listColors.empty())
return ThemeEngine::kFontColorNormal;
if (_filter.empty())
return _listColors[_selectedItem];
else
return _listColors[_listIndex[_selectedItem]];
}
void ListWidget::setList(const StringArray &list, const ColorList *colors) {
if (_editMode && _caretVisible)
drawCaret(true);
// Copy everything
_dataList = list;
_list = list;
_filter.clear();
_listIndex.clear();
_listColors.clear();
if (colors) {
_listColors = *colors;
assert(_listColors.size() == _dataList.size());
}
int size = list.size();
if (_currentPos >= size)
_currentPos = size - 1;
if (_currentPos < 0)
_currentPos = 0;
_selectedItem = -1;
_editMode = false;
g_system->setFeatureState(OSystem::kFeatureVirtualKeyboard, false);
scrollBarRecalc();
}
void ListWidget::append(const String &s, ThemeEngine::FontColor color) {
if (_dataList.size() == _listColors.size()) {
// If the color list has the size of the data list, we append the color.
_listColors.push_back(color);
} else if (!_listColors.size() && color != ThemeEngine::kFontColorNormal) {
// If it's the first entry to use a non default color, we will fill
// up all other entries of the color list with the default color and
// add the requested color for the new entry.
for (uint i = 0; i < _dataList.size(); ++i)
_listColors.push_back(ThemeEngine::kFontColorNormal);
_listColors.push_back(color);
}
_dataList.push_back(s);
_list.push_back(s);
setFilter(_filter, 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;
checkBounds();
scrollBarRecalc();
}
}
void ListWidget::scrollBarRecalc() {
_scrollBar->_numEntries = _list.size();
_scrollBar->_entriesPerPage = _entriesPerPage;
_scrollBar->_currentPos = _currentPos;
_scrollBar->recalc();
}
void ListWidget::handleTickle() {
if (_editMode)
EditableWidget::handleTickle();
_scrollBar->handleTickle();
}
void ListWidget::handleMouseDown(int x, int y, int button, int clickCount) {
if (!isEnabled())
return;
// First check whether the selection changed
int newSelectedItem = findItem(x, y);
if (_selectedItem != newSelectedItem && newSelectedItem != -1) {
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.
markAsDirty();
}
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)) &&
_selectedItem >= 0) {
sendCommand(kListItemDoubleClickedCmd, _selectedItem);
}
}
void ListWidget::handleMouseWheel(int x, int y, int direction) {
_scrollBar->handleMouseWheel(x, y, direction);
}
void ListWidget::handleMouseMoved(int x, int y, int button) {
if (!isEnabled())
return;
// Determine if we are inside the widget
if (x < 0 || x > _w)
return;
// First check whether the selection changed
int item = findItem(x, y);
if (item != -1) {
if(_lastRead != item) {
read(_dataList[item]);
_lastRead = item;
}
}
else
_lastRead = -1;
}
void ListWidget::handleMouseLeft(int button) {
_lastRead = -1;
}
int ListWidget::findItem(int x, int y) const {
if (y < _topPadding) return -1;
int item = (y - _topPadding) / kLineHeight + _currentPos;
if (item >= _currentPos && item < _currentPos + _entriesPerPage &&
item < (int)_list.size())
return item;
else
return -1;
}
static int matchingCharsIgnoringCase(const char *x, const char *y, bool &stop) {
int match = 0;
while (*x && *y && tolower(*x) == tolower(*y)) {
++x;
++y;
++match;
}
stop = !*y || (*x && (tolower(*x) >= tolower(*y)));
return match;
}
bool ListWidget::handleKeyDown(Common::KeyState state) {
bool handled = true;
bool dirty = false;
int oldSelectedItem = _selectedItem;
if (!_editMode && state.keycode <= Common::KEYCODE_z && Common::isPrint(state.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.
uint32 time = g_system->getMillis();
if (_quickSelectTime < time) {
_quickSelectStr = (char)state.ascii;
} else {
_quickSelectStr += (char)state.ascii;
}
_quickSelectTime = time + 300; // TODO: Turn this into a proper constant (kQuickSelectDelay ?)
if (_quickSelect) {
// 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 (StringArray::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 {
sendCommand(_cmd, 0);
}
} else if (_editMode) {
// Class EditableWidget handles all text editing related key presses for us
handled = EditableWidget::handleKeyDown(state);
} else {
// not editmode
switch (state.keycode) {
case Common::KEYCODE_RETURN:
case Common::KEYCODE_KP_ENTER:
if (_selectedItem >= 0) {
// override continuous enter keydown
if (_editable && (_currentKeyDown != Common::KEYCODE_RETURN && _currentKeyDown != Common::KEYCODE_KP_ENTER)) {
dirty = true;
startEditMode();
} else
sendCommand(kListItemActivatedCmd, _selectedItem);
}
break;
// Keypad & special keys
// - if num lock is set, we do not handle the keypress
// - if num lock is not set, we either fall down to the special key case
// or ignore the key press for 0, 4, 5 and 6
case Common::KEYCODE_KP_PERIOD:
if (state.flags & Common::KBD_NUM) {
handled = false;
break;
}
// fall through
case Common::KEYCODE_BACKSPACE:
case Common::KEYCODE_DELETE:
if (_selectedItem >= 0) {
if (_editable) {
// Ignore delete and backspace when the list item is editable
} else {
sendCommand(kListItemRemovalRequestCmd, _selectedItem);
}
}
break;
case Common::KEYCODE_KP1:
if (state.flags & Common::KBD_NUM) {
handled = false;
break;
}
// fall through
case Common::KEYCODE_END:
_selectedItem = _list.size() - 1;
break;
case Common::KEYCODE_KP2:
if (state.flags & Common::KBD_NUM) {
handled = false;
break;
}
// fall through
case Common::KEYCODE_DOWN:
if (_selectedItem < (int)_list.size() - 1)
_selectedItem++;
break;
case Common::KEYCODE_KP3:
if (state.flags & Common::KBD_NUM) {
handled = false;
break;
}
// fall through
case Common::KEYCODE_PAGEDOWN:
_selectedItem += _entriesPerPage - 1;
if (_selectedItem >= (int)_list.size() )
_selectedItem = _list.size() - 1;
break;
case Common::KEYCODE_KP7:
if (state.flags & Common::KBD_NUM) {
handled = false;
break;
}
// fall through
case Common::KEYCODE_HOME:
_selectedItem = 0;
break;
case Common::KEYCODE_KP8:
if (state.flags & Common::KBD_NUM) {
handled = false;
break;
}
// fall through
case Common::KEYCODE_UP:
if (_selectedItem > 0)
_selectedItem--;
break;
case Common::KEYCODE_KP9:
if (state.flags & Common::KBD_NUM) {
handled = false;
break;
}
// fall through
case Common::KEYCODE_PAGEUP:
_selectedItem -= _entriesPerPage - 1;
if (_selectedItem < 0)
_selectedItem = 0;
break;
default:
handled = false;
}
scrollToCurrent();
}
if (dirty || _selectedItem != oldSelectedItem)
markAsDirty();
if (_selectedItem != oldSelectedItem) {
sendCommand(kListSelectionChangedCmd, _selectedItem);
// also draw scrollbar
_scrollBar->markAsDirty();
}
return handled;
}
bool ListWidget::handleKeyUp(Common::KeyState state) {
if (state.keycode == _currentKeyDown)
_currentKeyDown = 0;
return true;
}
void ListWidget::receivedFocusWidget() {
_inversion = ThemeEngine::kTextInversionFocus;
// Redraw the widget so the selection color will change
markAsDirty();
}
void ListWidget::lostFocusWidget() {
_inversion = ThemeEngine::kTextInversion;
// If we lose focus, we simply forget the user changes
_editMode = false;
g_system->setFeatureState(OSystem::kFeatureVirtualKeyboard, false);
drawCaret(true);
markAsDirty();
}
void ListWidget::handleCommand(CommandSender *sender, uint32 cmd, uint32 data) {
switch (cmd) {
case kSetPositionCmd:
if (_currentPos != (int)data) {
_currentPos = data;
checkBounds();
markAsDirty();
// Scrollbar actions cause list focus (which triggers a redraw)
// NOTE: ListWidget's boss is always GUI::Dialog
((GUI::Dialog *)_boss)->setFocusWidget(this);
}
break;
default:
break;
}
}
void ListWidget::drawWidget() {
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), 0,
ThemeEngine::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;
ThemeEngine::TextInversionState inverted = ThemeEngine::kTextInversionNone;
// Draw the selected item inverted, on a highlighted background.
if (_selectedItem == pos)
inverted = _inversion;
Common::Rect r(getEditRect());
int pad = _leftPadding;
// If in numbering mode, we first print a number prefix
if (_numberingMode != kListNumberingOff) {
buffer = Common::String::format("%2d. ", (pos + _numberingMode));
g_gui.theme()->drawText(Common::Rect(_x + _hlLeftPadding, y, _x + r.left + _leftPadding, y + fontHeight - 2),
buffer, _state, Graphics::kTextAlignLeft, inverted, _leftPadding, true);
pad = 0;
}
ThemeEngine::FontColor color = ThemeEngine::kFontColorNormal;
if (!_listColors.empty()) {
if (_filter.empty() || _selectedItem == -1)
color = _listColors[pos];
else
color = _listColors[_listIndex[pos]];
}
if (_selectedItem == pos && _editMode) {
buffer = _editString;
color = _editColor;
adjustOffset();
g_gui.theme()->drawText(Common::Rect(_x + r.left, y, _x + r.right, y + fontHeight - 2), buffer, _state,
Graphics::kTextAlignLeft, inverted, pad, true, ThemeEngine::kFontStyleBold, color);
} else {
buffer = _list[pos];
g_gui.theme()->drawText(Common::Rect(_x + r.left, y, _x + r.right, y + fontHeight - 2), buffer, _state,
Graphics::kTextAlignLeft, inverted, pad, true, ThemeEngine::kFontStyleBold, color);
}
}
}
Common::Rect ListWidget::getEditRect() const {
const int scrollbarW = (_scrollBar && _scrollBar->isVisible()) ? _scrollBarWidth : 0;
Common::Rect r(_hlLeftPadding, 0, _w - _hlRightPadding - scrollbarW, kLineHeight - 2);
const int offset = (_selectedItem - _currentPos) * kLineHeight + _topPadding;
r.top += offset;
r.bottom += offset;
if (_numberingMode != kListNumberingOff) {
// FIXME: Assumes that all digits have the same width.
Common::String temp = Common::String::format("%2d. ", (_list.size() - 1 + _numberingMode));
r.left += g_gui.getStringWidth(temp) + _leftPadding;
}
return r;
}
void ListWidget::checkBounds() {
if (_currentPos < 0 || _entriesPerPage > (int)_list.size())
_currentPos = 0;
else if (_currentPos + _entriesPerPage > (int)_list.size())
_currentPos = _list.size() - _entriesPerPage;
}
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;
}
checkBounds();
_scrollBar->_currentPos = _currentPos;
_scrollBar->recalc();
}
void ListWidget::scrollToEnd() {
if (_currentPos + _entriesPerPage < (int)_list.size()) {
_currentPos = _list.size() - _entriesPerPage;
} else {
return;
}
_scrollBar->_currentPos = _currentPos;
_scrollBar->recalc();
_scrollBar->markAsDirty();
}
void ListWidget::startEditMode() {
if (_editable && !_editMode && _selectedItem >= 0) {
_editMode = true;
setEditString(_list[_selectedItem]);
_caretPos = _editString.size(); // Force caret to the *end* of the selection.
if (_listColors.empty()) {
_editColor = ThemeEngine::kFontColorNormal;
} else {
if (_filter.empty())
_editColor = _listColors[_selectedItem];
else
_editColor = _listColors[_listIndex[_selectedItem]];
}
markAsDirty();
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);
//markAsDirty();
g_system->setFeatureState(OSystem::kFeatureVirtualKeyboard, false);
}
void ListWidget::reflowLayout() {
Widget::reflowLayout();
_leftPadding = g_gui.xmlEval()->getVar("Globals.ListWidget.Padding.Left", 0);
_rightPadding = g_gui.xmlEval()->getVar("Globals.ListWidget.Padding.Right", 0);
_topPadding = g_gui.xmlEval()->getVar("Globals.ListWidget.Padding.Top", 0);
_bottomPadding = g_gui.xmlEval()->getVar("Globals.ListWidget.Padding.Bottom", 0);
_hlLeftPadding = g_gui.xmlEval()->getVar("Globals.ListWidget.hlLeftPadding", 0);
_hlRightPadding = g_gui.xmlEval()->getVar("Globals.ListWidget.hlRightPadding", 0);
_scrollBarWidth = g_gui.xmlEval()->getVar("Globals.Scrollbar.Width", 0);
// HACK: Once we take padding into account, there are times where
// integer rounding leaves a big chunk of white space in the bottom
// of the list.
// We do a rough rounding on the decimal places of Entries Per Page,
// to add another entry even if it goes a tad over the padding.
frac_t entriesPerPage = intToFrac(_h - _topPadding - _bottomPadding) / kLineHeight;
// Our threshold before we add another entry is 0.9375 (0xF000 with FRAC_BITS being 16).
const frac_t threshold = intToFrac(15) / 16;
if ((frac_t)(entriesPerPage & FRAC_LO_MASK) >= threshold)
entriesPerPage += FRAC_ONE;
_entriesPerPage = fracToInt(entriesPerPage);
assert(_entriesPerPage > 0);
if (_scrollBar) {
_scrollBar->resize(_w - _scrollBarWidth, 0, _scrollBarWidth, _h);
scrollBarRecalc();
scrollToCurrent();
}
}
void ListWidget::setFilter(const String &filter, bool redraw) {
// FIXME: This method does not deal correctly with edit mode!
// Until we fix that, let's make sure it isn't called while editing takes place
assert(!_editMode);
String filt = filter;
filt.toLowercase();
if (_filter == filt) // Filter was not changed
return;
_filter = filt;
if (_filter.empty()) {
// No filter -> display everything
_list = _dataList;
_listIndex.clear();
} else {
// Restrict the list to everything which contains all words in _filter
// as substrings, ignoring case.
Common::StringTokenizer tok(_filter);
String tmp;
int n = 0;
_list.clear();
_listIndex.clear();
for (StringArray::iterator i = _dataList.begin(); i != _dataList.end(); ++i, ++n) {
tmp = *i;
tmp.toLowercase();
bool matches = true;
tok.reset();
while (!tok.empty()) {
if (!tmp.contains(tok.nextToken())) {
matches = false;
break;
}
}
if (matches) {
_list.push_back(*i);
_listIndex.push_back(n);
}
}
}
_currentPos = 0;
_selectedItem = -1;
if (redraw) {
scrollBarRecalc();
// Redraw the whole dialog. This is annoying, as this might be rather
// expensive when really only the list widget and its scroll bar area
// to be redrawn. However, since the scrollbar might change its
// visibility status, and the list its width, we cannot just redraw
// the two.
// TODO: A more efficient (and elegant?) way to handle this would be to
// introduce a kind of "BoxWidget" or "GroupWidget" which defines a
// rectangular region and subwidgets can be placed within it.
// Such a widget could also (optionally) draw a border (or even different
// kinds of borders) around the objects it groups; and also a 'title'
// (I am borrowing these "ideas" from the NSBox class in Cocoa :).
g_gui.scheduleTopDialogRedraw();
}
}
} // End of namespace GUI
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