bool DropDownMenu::handle_mouse_up(DispPoint coord) {
if (!clicked) {
return false;
}
clicked = false;
// Find clicked row
int row_size = text_size + vertical_padding*2;
selected_entry_idx = coord.y / row_size;
// order matters incase entries is empty to avoid -1
if (selected_entry_idx >= entries.size())
{ selected_entry_idx = entries.size()-1; }
if (selected_entry_idx <= 0)
{ selected_entry_idx = 0; }
update_menu_view();
resize(get_w(), row_size);
int vert_adj = -selected_entry_idx * row_size; // (move subview up)
move_subview(menu, DispPoint(0, vert_adj)); // move correct entry to visible
get_parent()->move_subview(this, pre_click_pos);
lose_focus();
return true;
}
void ScrollView::move_scroll_bar_to(VGPoint pos) {
const double display_scroll_range = display_view->get_h() - get_h();
const double scroll_bar_range = scroll_bar_bottom + 7 - scroll_bar_top - scroll_bar.get_h();
if (pos.y < scroll_bar_top) {
pos.y = scroll_bar_top;
}
if (pos.y > scroll_bar_range) {
pos.y = scroll_bar_range;
}
move_subview(&scroll_bar, pos);
const double ratio = display_scroll_range / scroll_bar_range;
scroll_y = pos.y * ratio;
move_subview(display_view, VGPoint(0, -scroll_y));
}
void ScrollView::move_display_to(VGPoint pos) {
const double display_scroll_range = display_view->get_h() - get_h();
const double scroll_bar_range = scroll_bar_bottom - scroll_bar_top - scroll_bar.get_h();
scroll_y = pos.y;
if (scroll_y < 0) {
scroll_y = 0;
scroll_y_vel = 0;
}
if (scroll_y > display_scroll_range) {
scroll_y = display_scroll_range;
scroll_y_vel = 0;
}
move_subview(display_view, VGPoint(pos.x, -scroll_y));
int scroll_bar_pos = scroll_bar_top + (scroll_y / display_scroll_range * scroll_bar_range);
move_subview(&scroll_bar, VGPoint(scroll_bar_x, scroll_bar_pos));
}
// Mouse Events. Following three functions all work the same:
// Returns true if the mouse-event is finished being handled.
// If returns false, handling will continue up the chain.
// May optionally call capture_focus() to become the target for keypresses.
bool DropDownMenu::handle_mouse_down(DispPoint coord) {
capture_focus();
if (clicked) {
return false;
}
clicked = true;
pre_click_pos = get_rel_pos();
resize(get_w(), menu->get_h());
fill_with_color(get_clear_color());
int vert_adj = -selected_entry_idx * (text_size + vertical_padding*2); // (up)
move_subview(menu, DispPoint()); // reset menu subview
get_parent()->move_subview(this, get_rel_pos() + DispPoint(0,vert_adj));
return true;
}