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sculpt: make component graph scrollable

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This patch allows the user to vertically scroll the component graph
either via the scroll wheel or via the page up/down keys.

Issue #5183
This commit is contained in:
Norman Feske 2024-04-12 15:43:31 +02:00
parent c4f75f49e5
commit 7df19173af
1 changed files with 40 additions and 2 deletions
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42
repos/gems/src/app/sculpt_manager/main.cc
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@ -845,6 +845,24 @@ struct Sculpt::Main : Input_event_handler,
need_generate_dialog = true;
});
auto handle_vertical_scroll = [&] (int &scroll_ypos)
{
int dy = 0;
ev.handle_wheel([&] (int, int y) { dy = y*32; });
if (ev.key_press(Input::KEY_PAGEUP)) dy = int(_gui.mode().area.h() / 3);
if (ev.key_press(Input::KEY_PAGEDOWN)) dy = -int(_gui.mode().area.h() / 3);
if (dy != 0) {
scroll_ypos += dy;
_wheel_handler.local_submit();
}
};
if (_selected_tab == Panel_dialog::Tab::COMPONENTS)
handle_vertical_scroll(_graph_scroll_ypos);
if (need_generate_dialog) {
_generate_dialog();
_popup_dialog.refresh();
@ -1469,6 +1487,16 @@ struct Sculpt::Main : Input_event_handler,
fn(win); });
}
int _graph_scroll_ypos = 0;
/*
* Signal handler used for locally triggering a window-layout update
*
* Wheel events tend to come in batches, the signal handler is used to
* defer the call of '_update_window_layout' until all events are processed.
*/
Signal_handler<Main> _wheel_handler { _env.ep(), *this, &Main::_update_window_layout };
/*******************
** Runtime graph **
@ -1715,8 +1743,18 @@ void Sculpt::Main::_update_window_layout(Xml_node const &decorator_margins,
*/
Point runtime_view_pos { };
_with_window(window_list, runtime_view_label, [&] (Xml_node const &win) {
Area const size = constrained_win_size(win);
runtime_view_pos = Rect(inspect_p1, inspect_p2).center(size);
Area const size = win_size(win);
Rect const inspect(inspect_p1, inspect_p2);
/* sanitize graph scroll position */
if (size.h() > inspect.h()) {
int const out_of_view_h = size.h() - inspect.h();
_graph_scroll_ypos = max(_graph_scroll_ypos, -out_of_view_h);
_graph_scroll_ypos = min(_graph_scroll_ypos, out_of_view_h);
} else
_graph_scroll_ypos = 0;
runtime_view_pos = inspect.center(size) + Point(0, _graph_scroll_ypos);
});
if (_popup.state == Popup::VISIBLE) {