bool
ListControl::OnKeyDown(unsigned key_code)
{
scroll_bar.DragEnd(this);
kinetic_timer.Cancel();
switch (key_code) {
case KEY_RETURN:
if (CanActivateItem())
ActivateItem();
return true;
case KEY_UP:
// previous item
if (GetCursorIndex() <= 0)
break;
MoveCursor(-1);
return true;
case KEY_DOWN:
// next item
if (GetCursorIndex() +1 >= length)
break;
MoveCursor(1);
return true;
case KEY_LEFT:
// page up
MoveCursor(-(int)items_visible);
return true;
case KEY_RIGHT:
// page down
MoveCursor(items_visible);
return true;
case KEY_HOME:
SetCursorIndex(0);
return true;
case KEY_END:
if (length > 0) {
SetCursorIndex(length - 1);
}
return true;
case KEY_PRIOR:
MoveCursor(-(int)items_visible);
return true;
case KEY_NEXT:
MoveCursor(items_visible);
return true;
}
return PaintWindow::OnKeyDown(key_code);
}
void
ListControl::SetLength(unsigned n)
{
if (n == length)
return;
unsigned cursor = GetCursorIndex();
length = n;
if (n == 0)
cursor = 0;
else if (cursor >= n)
cursor = n - 1;
items_visible = GetHeight() / item_height;
if (n <= items_visible)
origin = 0;
else if (origin + items_visible > n)
origin = n - items_visible;
else if (cursor < origin)
origin = cursor;
show_or_hide_scroll_bar();
Invalidate();
SetCursorIndex(cursor);
}
void
ListControl::MoveCursor(int delta)
{
if (length == 0)
return;
int new_cursor = cursor + delta;
if (new_cursor < 0)
new_cursor = 0;
else if ((unsigned)new_cursor >= length)
new_cursor = length - 1;
SetCursorIndex(new_cursor);
}
bool
ListControl::OnMouseDown(PixelScalar x, PixelScalar y)
{
// End any previous drag
scroll_bar.DragEnd(this);
drag_end();
#ifndef _WIN32_WCE
kinetic_timer.Cancel();
#endif
RasterPoint Pos;
Pos.x = x;
Pos.y = y;
// If possible -> Give focus to the Control
const bool had_focus = HasFocus();
if (!had_focus)
SetFocus();
if (scroll_bar.IsInsideSlider(Pos)) {
// if click is on scrollbar handle
// -> start mouse drag
scroll_bar.DragBegin(this, Pos.y);
} else if (scroll_bar.IsInside(Pos)) {
// if click in scroll bar up/down/pgup/pgdn
if (scroll_bar.IsInsideUpArrow(Pos.y))
// up
MoveOrigin(-1);
else if (scroll_bar.IsInsideDownArrow(Pos.y))
// down
MoveOrigin(1);
else if (scroll_bar.IsAboveSlider(Pos.y))
// page up
MoveOrigin(-(int)items_visible);
else if (scroll_bar.IsBelowSlider(Pos.y))
// page down
MoveOrigin(items_visible);
} else {
// if click in ListBox area
// -> select appropriate item
int index = ItemIndexAt(y);
// If mouse was clicked outside the list items -> cancel
if (index < 0)
return false;
drag_y = GetPixelOrigin() + y;
drag_y_window = y;
if (had_focus && (unsigned)index == GetCursorIndex() &&
CanActivateItem()) {
drag_mode = DragMode::CURSOR;
Invalidate_item(cursor);
} else {
// If item was not selected before
// -> select it
SetCursorIndex(index);
drag_mode = DragMode::SCROLL;
}
#ifndef _WIN32_WCE
kinetic.MouseDown(GetPixelOrigin());
#endif
SetCapture();
}
return true;
}
bool
ListControl::OnKeyDown(unsigned key_code)
{
scroll_bar.DragEnd(this);
#ifndef _WIN32_WCE
kinetic_timer.Cancel();
#endif
switch (key_code) {
#ifdef GNAV
// JMW added this to make data entry easier
case KEY_APP4:
#endif
case KEY_RETURN:
if (CanActivateItem())
ActivateItem();
return true;
case KEY_UP:
case KEY_LEFT:
if (!HasPointer() ^ (key_code == KEY_LEFT)) {
// page up
MoveCursor(-(int)items_visible);
return true;
} else {
// previous item
if (GetCursorIndex() <= 0)
break;
MoveCursor(-1);
return true;
}
case KEY_DOWN:
case KEY_RIGHT:
if (!HasPointer() ^ (key_code == KEY_RIGHT)) {
// page down
MoveCursor(items_visible);
return true;
} else {
// next item
if (GetCursorIndex() +1 >= length)
break;
MoveCursor(1);
return true;
}
case KEY_HOME:
SetCursorIndex(0);
return true;
case KEY_END:
if (length > 0) {
SetCursorIndex(length - 1);
}
return true;
case KEY_PRIOR:
MoveCursor(-(int)items_visible);
return true;
case KEY_NEXT:
MoveCursor(items_visible);
return true;
}
return PaintWindow::OnKeyDown(key_code);
}
