void DropDownList::drawItem(DC& dc, int y, size_t item) {
if (y + item_size.height <= 0 || y >= dc.GetSize().y) return; // not visible
// draw background
dc.SetPen(*wxTRANSPARENT_PEN);
if (item == selected_item) {
if (itemEnabled(item)) {
dc.SetBrush (wxSystemSettings::GetColour(wxSYS_COLOUR_HIGHLIGHT));
dc.SetTextForeground(wxSystemSettings::GetColour(wxSYS_COLOUR_HIGHLIGHTTEXT));
} else {
dc.SetBrush (wxSystemSettings::GetColour(wxSYS_COLOUR_GRAYTEXT));
dc.SetTextForeground(wxSystemSettings::GetColour(wxSYS_COLOUR_HIGHLIGHTTEXT));
}
dc.DrawRectangle(marginW, y, (int)item_size.width, (int)item_size.height);
} else if (!itemEnabled(item)) {
// mix between foreground and background
dc.SetTextForeground(wxSystemSettings::GetColour(wxSYS_COLOUR_GRAYTEXT));
} else if (highlightItem(item)) {
// mix a color between selection and window
dc.SetBrush (lerp(wxSystemSettings::GetColour(wxSYS_COLOUR_HIGHLIGHT),
wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW), 0.75));
dc.SetTextForeground(wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOWTEXT));
dc.DrawRectangle(marginW, y, (int)item_size.width, (int)item_size.height);
} else {
dc.SetTextForeground(wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOWTEXT));
}
// draw text and icon
drawIcon(dc, marginW, y, item, item == selected_item);
dc.DrawText(capitalize(itemText(item)), marginW + (int)icon_size.width + 1, y + text_offset);
// draw popup icon
if (submenu(item)) {
draw_menu_arrow(this, dc, RealRect(marginW, y, item_size.width, item_size.height), item == selected_item);
}
// draw line below
if (lineBelow(item) && item != itemCount()) {
dc.SetPen(wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOWTEXT));
dc.DrawLine(marginW, y + (int)item_size.height, marginW + (int)item_size.width, y + (int)item_size.height);
}
}
void DropDownList::draw(DC& dc) {
// Size
wxSize cs = dc.GetSize();
// Draw background & frame
dc.SetPen (*wxTRANSPARENT_PEN);
dc.SetBrush(wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW));
dc.DrawRectangle(0, 0, cs.x, cs.y);
dc.SetFont(*wxNORMAL_FONT);
// Draw items
int y = marginH - visible_start;
size_t count = itemCount();
for (size_t i = 0 ; i < count ; ++i) {
drawItem(dc, y, i);
y += (int)item_size.height + lineBelow(i);
}
}