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Allow user to select ListWidget entries by typing them (see FR #922921)

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svn-id: r14295
This commit is contained in:
Max Horn 2004-07-21 14:28:57 +00:00
parent be31329d05
commit 9f91359c2e
2 changed files with 77 additions and 25 deletions
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98
gui/ListWidget.cpp
View File

@ -41,6 +41,8 @@ ListWidget::ListWidget(GuiObject *boss, int x, int y, int w, int h)
_caretVisible = false;
_caretTime = 0;
_quickSelectTime = 0;
// FIXME: This flag should come from widget definition
_editable = true;
@ -125,48 +127,94 @@ void ListWidget::handleMouseWheel(int x, int y, int direction) {
_scrollBar->handleMouseWheel(x, y, direction);
}
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) {
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 = g_system->get_msecs();
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) {
if (_caretVisible)
drawCaret(true);
switch (keycode) {
case '\n': // enter/return
case '\r':
// enter, confirm edit and exit editmode
_editMode = false;
case '\n': // enter/return
case '\r':
// confirm edit and exit editmode
_editMode = false;
dirty = true;
sendCommand(kListItemActivatedCmd, _selectedItem);
break;
case 27: // escape
// abort edit and exit editmode
_editMode = false;
dirty = true;
_list[_selectedItem] = _backupString;
break;
case 8: // backspace
_list[_selectedItem].deleteLastChar();
dirty = true;
break;
default:
if (isprint((char)ascii)) {
_list[_selectedItem] += (char)ascii;
dirty = true;
sendCommand(kListItemActivatedCmd, _selectedItem);
break;
case 27: // escape
// ESC, abort edit and exit editmode
_editMode = false;
dirty = true;
_list[_selectedItem] = _backupString;
break;
case 8: // backspace
_list[_selectedItem].deleteLastChar();
dirty = true;
break;
default:
if (isprint((char)ascii)) {
_list[_selectedItem] += (char)ascii;
dirty = true;
} else {
handled = false;
}
} else {
handled = false;
}
}
} else {
// not editmode
switch (keycode) {
case '\n': // enter
case '\n': // enter/return
case '\r':
if (_selectedItem >= 0) {
// override continuous enter keydown

4
gui/ListWidget.h
View File

@ -56,8 +56,12 @@ protected:
ScrollBarWidget *_scrollBar;
int _currentKeyDown;
String _backupString;
bool _caretVisible;
uint32 _caretTime;
String _quickSelectStr;
uint32 _quickSelectTime;
public:
ListWidget(GuiObject *boss, int x, int y, int w, int h);
virtual ~ListWidget();