void DropDownList::show(bool in_place, wxPoint pos, RealRect* rect) {
if (IsShown()) return;
onShow();
// find selection
selected_item = selection();
// width
size_t count = itemCount();
if (item_size.width == 100) { // not initialized
wxClientDC dc(this);
dc.SetFont(*wxNORMAL_FONT);
for (size_t i = 0 ; i < count ; ++i) {
int text_width;
dc.GetTextExtent(capitalize(itemText(i)), &text_width, 0);
item_size.width = max(item_size.width, text_width + icon_size.width + 14); // 14 = room for popup arrow + padding
}
}
// height
int line_count = 0;
for (size_t i = 0 ; i < count ; ++i) if (lineBelow(i)) line_count += 1;
// size
RealSize border_size(2,2); // GetClientSize() - GetSize(), assume 1px borders
RealSize size(
item_size.width + marginW * 2,
item_size.height * count + marginH * 2 + line_count
);
// placement
int parent_height = 0;
if (!in_place && viewer) {
// Position the drop down list below the editor control (based on the style)
Rotation rot = viewer->viewer.getRotation();
Rotater rr(rot, viewer->getRotation());
RealRect r = rot.trRectToBB(rect ? *rect : rot.getInternalRect());
if (viewer->viewer.nativeLook()) {
pos = RealPoint(r.x - 3, r.y - 3);
size.width = max(size.width, r.width + 6);
parent_height = (int)r.height + 6;
} else {
pos = RealPoint(r.x - 1, r.y - 1);
parent_height = (int)r.height;
}
} else if (parent_menu) {
parent_height = -(int)item_size.height - 1;
}
pos = GetParent()->ClientToScreen(pos);
// virtual size = item size
RealSize virtual_size = size;
SetVirtualSize(virtual_size);
item_size.width = virtual_size.width - marginW * 2;
// is there enough room for all items, or do we need a scrollbar?
int room_below = wxGetDisplaySize().y - border_size.height - pos.y - parent_height - 50;
int max_height = max(300, room_below);
if (size.height > max_height) {
size.height = max_height;
size.width += wxSystemSettings::GetMetric(wxSYS_VSCROLL_ARROW_X); // width of scrollbar
SetScrollbar(wxVERTICAL, 0, size.height, virtual_size.height, false);
} else {
SetScrollbar(wxVERTICAL,0,0,0,false);
}
// move & resize
SetSize(add_diagonal(size, border_size));
Position(pos, wxSize(0, parent_height));
// visible item
visible_start = 0;
ensureSelectedItemVisible();
// set event handler
if (hider) {
assert(hider2);
wxGetTopLevelParent(GetParent())->PushEventHandler(hider);
GetParent() ->PushEventHandler(hider2);
}
// show
if (selected_item == NO_SELECTION && itemCount() > 0) selected_item = 0; // select first item by default
mouse_down = false;
close_on_mouse_out = false;
wxPopupWindow::Show();
if (isRoot() && GetParent()->HasCapture()) {
// release capture on parent
GetParent()->ReleaseMouse();
}
// fix drop down arrow
redrawArrowOnParent();
}
