BListItem*
BListView::RemoveItem(int32 index)
{
BListItem* item = ItemAt(index);
if (item == NULL)
return NULL;
if (item->IsSelected())
Deselect(index);
if (!fList.RemoveItem(item))
return NULL;
if (fFirstSelected != -1 && index < fFirstSelected)
fFirstSelected--;
if (fLastSelected != -1 && index < fLastSelected)
fLastSelected--;
if (fAnchorIndex != -1 && index < fAnchorIndex)
fAnchorIndex--;
_RecalcItemTops(index);
_InvalidateFrom(index);
_FixupScrollBar();
return item;
}
void
BListView::_Track(BPoint where, uint32)
{
if (fTrack->item_index >= 0 && fTrack->try_drag) {
// initiate a drag if the mouse was moved far enough
BPoint offset = where - fTrack->drag_start;
float dragDistance = sqrtf(offset.x * offset.x + offset.y * offset.y);
if (dragDistance >= 5.0f) {
fTrack->try_drag = false;
fTrack->is_dragging = InitiateDrag(fTrack->drag_start,
fTrack->item_index, fTrack->was_selected);
}
}
if (!fTrack->is_dragging) {
// do selection only if a drag was not initiated
int32 index = IndexOf(where);
BListItem* item = ItemAt(index);
if (item != NULL && !item->IsSelected() && item->IsEnabled()) {
Select(index, fListType == B_MULTIPLE_SELECTION_LIST
&& (modifiers() & B_SHIFT_KEY) != 0);
ScrollToSelection();
}
}
}
void
AudioListView::MouseDown(BPoint position)
{
if (!IsEmpty()) {
bool onSelection = false;
BListItem* item = ItemAt(IndexOf(position));
if (item != NULL && item->IsSelected())
onSelection = true;
uint32 buttons = 0;
if (Window() != NULL && Window()->CurrentMessage() != NULL)
buttons = Window()->CurrentMessage()->FindInt32("buttons");
if ((buttons & B_SECONDARY_MOUSE_BUTTON) != 0) {
if (CurrentSelection() < 0 || !onSelection)
Select(IndexOf(position));
if (CurrentSelection() >= 0)
_ShowPopUpMenu(ConvertToScreen(position));
return;
}
}
BListView::MouseDown(position);
}
bool
BListView::IsItemSelected(int32 index) const
{
BListItem* item = ItemAt(index);
if (item != NULL)
return item->IsSelected();
return false;
}
bool
BListView::_ReplaceItem(int32 index, BListItem* item)
{
if (item == NULL)
return false;
BListItem* old = ItemAt(index);
if (!old)
return false;
BRect frame = ItemFrame(index);
bool selectionChanged = old->IsSelected() != item->IsSelected();
// replace item
if (!fList.ReplaceItem(index, item))
return false;
// tack selection
if (selectionChanged) {
int32 start = min_c(fFirstSelected, index);
int32 end = max_c(fLastSelected, index);
_RescanSelection(start, end);
SelectionChanged();
}
_RecalcItemTops(index);
bool itemHeightChanged = frame != ItemFrame(index);
// take care of invalidation
if (Window()) {
// NOTE: window looper is assumed to be locked!
if (itemHeightChanged)
_InvalidateFrom(index);
else
Invalidate(frame);
}
if (itemHeightChanged)
_FixupScrollBar();
return true;
}
/*! Selects the item at the specified \a index, and returns \c true in
case the selection was changed because of this method.
If \a extend is \c false, all previously selected items are deselected.
*/
bool
BListView::_Select(int32 index, bool extend)
{
if (index < 0 || index >= CountItems())
return false;
// only lock the window when there is one
BAutolock locker(Window());
if (Window() != NULL && !locker.IsLocked())
return false;
bool changed = false;
if (!extend && fFirstSelected != -1)
changed = _DeselectAll(index, index);
fAnchorIndex = index;
BListItem* item = ItemAt(index);
if (!item->IsEnabled() || item->IsSelected()) {
// if the item is already selected, or can't be selected,
// we're done here
return changed;
}
// keep track of first and last selected item
if (fFirstSelected == -1) {
// no previous selection
fFirstSelected = index;
fLastSelected = index;
} else if (index < fFirstSelected) {
fFirstSelected = index;
} else if (index > fLastSelected) {
fLastSelected = index;
}
ItemAt(index)->Select();
if (Window())
InvalidateItem(index);
return true;
}
// ObjectChanged
void
DragSortableListView::ObjectChanged(const Observable* object)
{
if (object != fSelection || fModifyingSelection || fSyncingToSelection)
return;
//printf("%s - syncing start\n", Name());
fSyncingToSelection = true;
// try to sync to Selection
BList selectedItems;
int32 count = fSelection->CountSelected();
for (int32 i = 0; i < count; i++) {
int32 index = IndexOfSelectable(fSelection->SelectableAtFast(i));
if (index >= 0) {
BListItem* item = ItemAt(index);
if (item && !selectedItems.HasItem((void*)item))
selectedItems.AddItem((void*)item);
}
}
count = selectedItems.CountItems();
if (count == 0) {
if (CurrentSelection(0) >= 0)
DeselectAll();
} else {
count = CountItems();
for (int32 i = 0; i < count; i++) {
BListItem* item = ItemAt(i);
bool selected = selectedItems.RemoveItem((void*)item);
if (item->IsSelected() != selected) {
Select(i, true);
}
}
}
fSyncingToSelection = false;
//printf("%s - done\n", Name());
}
/*!
Selects the items between \a from and \a to, and returns \c true in
case the selection was changed because of this method.
If \a extend is \c false, all previously selected items are deselected.
*/
bool
BListView::_Select(int32 from, int32 to, bool extend)
{
if (to < from)
return false;
BAutolock locker(Window());
if (Window() && !locker.IsLocked())
return false;
bool changed = false;
if (fFirstSelected != -1 && !extend)
changed = _DeselectAll(from, to);
if (fFirstSelected == -1) {
fFirstSelected = from;
fLastSelected = to;
} else {
if (from < fFirstSelected)
fFirstSelected = from;
if (to > fLastSelected)
fLastSelected = to;
}
for (int32 i = from; i <= to; ++i) {
BListItem *item = ItemAt(i);
if (item && !item->IsSelected()) {
item->Select();
if (Window())
InvalidateItem(i);
changed = true;
}
}
return changed;
}
// MouseDown
void
DragSortableListView::MouseDown( BPoint where )
{
int32 clicks = 1;
uint32 buttons = 0;
Window()->CurrentMessage()->FindInt32("clicks", &clicks);
Window()->CurrentMessage()->FindInt32("buttons", (int32*)&buttons);
int32 clickedIndex = -1;
for (int32 i = 0; BListItem* item = ItemAt(i); i++) {
if (ItemFrame(i).Contains(where)) {
if (clicks == 2) {
// only do something if user clicked the same item twice
if (fLastClickedItem == item)
DoubleClicked(i);
} else {
// remember last clicked item
fLastClickedItem = item;
}
clickedIndex = i;
break;
}
}
if (clickedIndex == -1)
fLastClickedItem = NULL;
BListItem* item = ItemAt(clickedIndex);
if (ListType() == B_MULTIPLE_SELECTION_LIST
&& item && (buttons & B_SECONDARY_MOUSE_BUTTON)) {
if (item->IsSelected())
Deselect(clickedIndex);
else
Select(clickedIndex, true);
} else {
BListView::MouseDown(where);
}
}
bool
BListView::_DeselectAll(int32 exceptFrom, int32 exceptTo)
{
if (fFirstSelected == -1)
return false;
BAutolock locker(Window());
if (Window() && !locker.IsLocked())
return false;
bool changed = false;
for (int32 index = fFirstSelected; index <= fLastSelected; index++) {
// don't deselect the items we shouldn't deselect
if (exceptFrom != -1 && exceptFrom <= index && exceptTo >= index)
continue;
BListItem *item = ItemAt(index);
if (item && item->IsSelected()) {
item->Deselect();
InvalidateItem(index);
changed = true;
}
}
if (!changed)
return false;
if (exceptFrom != -1) {
fFirstSelected = _CalcFirstSelected(exceptFrom);
fLastSelected = _CalcLastSelected(exceptTo);
} else
fFirstSelected = fLastSelected = -1;
return true;
}
bool
BListView::_Deselect(int32 index)
{
if (index < 0 || index >= CountItems())
return false;
BWindow *window = Window();
BAutolock locker(window);
if (window && !locker.IsLocked())
return false;
BListItem *item = ItemAt(index);
if (item && item->IsSelected()) {
BRect frame(ItemFrame(index));
BRect bounds(Bounds());
item->Deselect();
if (fFirstSelected == index && fLastSelected == index) {
fFirstSelected = -1;
fLastSelected = -1;
} else {
if (fFirstSelected == index)
fFirstSelected = _CalcFirstSelected(index);
if (fLastSelected == index)
fLastSelected = _CalcLastSelected(index);
}
if (window && bounds.Intersects(frame))
DrawItem(ItemAt(index), frame, true);
}
return true;
}
void
NamesView::MouseDown (BPoint myPoint)
{
int32 selected (IndexOf (myPoint));
bool handled (false);
if (selected < 0)
{
DeselectAll();
return;
}
BMessage *inputMsg (Window()->CurrentMessage());
int32 mousebuttons (0),
keymodifiers (0),
mouseclicks (0);
inputMsg->FindInt32 ("buttons", &mousebuttons);
inputMsg->FindInt32 ("modifiers", &keymodifiers);
inputMsg->FindInt32 ("clicks", &mouseclicks);
if (mouseclicks > 1
&& CurrentSelection(1) <= 0
&& mousebuttons == B_PRIMARY_MOUSE_BUTTON
&& (keymodifiers & B_SHIFT_KEY) == 0
&& (keymodifiers & B_OPTION_KEY) == 0
&& (keymodifiers & B_COMMAND_KEY) == 0
&& (keymodifiers & B_CONTROL_KEY) == 0)
{
// user double clicked
BListItem *item (ItemAt (IndexOf(myPoint)));
if (item && !item->IsSelected())
{
// "double" clicked away from another selection
Select (IndexOf (myPoint), false);
fCurrentindex = IndexOf (myPoint);
fTracking = true;
}
else if (item && item->IsSelected())
{
// double clicking on a single item
NameItem *myItem (reinterpret_cast<NameItem *>(item));
BString theNick (myItem->Name());
BMessage msg (M_OPEN_MSGAGENT);
msg.AddString ("nick", theNick.String());
reinterpret_cast<ChannelAgent *>(Parent()->Parent())->fMsgr.SendMessage (&msg);
}
handled = true;
}
if (mouseclicks == 1
&& CurrentSelection(1) <= 0
&& mousebuttons == B_PRIMARY_MOUSE_BUTTON
&& (keymodifiers & B_SHIFT_KEY) == 0
&& (keymodifiers & B_OPTION_KEY) == 0
&& (keymodifiers & B_COMMAND_KEY) == 0
&& (keymodifiers & B_CONTROL_KEY) == 0)
{
// user single clicks
BListItem *item (ItemAt (IndexOf(myPoint)));
if (item && !item->IsSelected())
Select (IndexOf (myPoint), false);
fTracking = true;
fCurrentindex = IndexOf (myPoint);
handled = true;
}
if (mouseclicks >= 1
&& CurrentSelection(1) >= 0
&& mousebuttons == B_PRIMARY_MOUSE_BUTTON
&& (keymodifiers & B_SHIFT_KEY) == 0
&& (keymodifiers & B_OPTION_KEY) == 0
&& (keymodifiers & B_COMMAND_KEY) == 0
&& (keymodifiers & B_CONTROL_KEY) == 0)
{
// user clicks on something in the middle of a sweep selection
BListItem *item (ItemAt (IndexOf(myPoint)));
if (item)
Select (IndexOf (myPoint), false);
fTracking = true;
fCurrentindex = IndexOf (myPoint);
handled = true;
}
if (mousebuttons == B_SECONDARY_MOUSE_BUTTON
&& (keymodifiers & B_SHIFT_KEY) == 0
&& (keymodifiers & B_OPTION_KEY) == 0
&& (keymodifiers & B_COMMAND_KEY) == 0
&& (keymodifiers & B_CONTROL_KEY) == 0)
{
// user right clicks - display popup menu
BListItem *item (ItemAt (IndexOf(myPoint)));
if (item && !item->IsSelected())
Select (IndexOf (myPoint), false);
fMyPopUp->Go (
ConvertToScreen (myPoint),
true,
false,
ConvertToScreen (ItemFrame (selected)));
handled = true;
}
if (mousebuttons == B_TERTIARY_MOUSE_BUTTON)
BListView::MouseDown (myPoint);
fLastSelected = selected;
if (!handled)
BListView::MouseDown (myPoint);
}
