mirror of
https://gitlab.freedesktop.org/dabrain34/GstPipelineStudio.git
synced 2024-12-24 00:40:29 +00:00
graphview: implement link on mouse pointer
Draw a dash line following the mouse pointer when an available port has been clicked.
This commit is contained in:
parent
cf8c8ab585
commit
620f6bf699
1 changed files with 128 additions and 58 deletions
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@ -69,6 +69,7 @@ mod imp {
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pub(super) current_port_id: Cell<u32>,
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pub(super) current_link_id: Cell<u32>,
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pub(super) port_selected: RefCell<Option<Port>>,
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pub(super) mouse_position: Cell<(f64, f64)>,
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}
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#[glib::object_subclass]
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@ -225,12 +226,29 @@ mod imp {
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info!("add selected port id {}", port_clicked.id());
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widget.set_selected_port(Some(&port_clicked));
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}
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} else {
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// click to a linked port
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widget.set_selected_port(None);
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}
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} else {
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// Click to something else than a port
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widget.set_selected_port(None);
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}
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}
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}
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}));
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obj.add_controller(&gesture);
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let event_motion = gtk::EventControllerMotion::new();
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event_motion.connect_motion(glib::clone!(@weak obj => move |_e, x, y| {
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let graphview = obj;
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if graphview.selected_port().is_some() {
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graphview.set_mouse_position(x,y);
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graphview.queue_draw();
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}
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}));
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obj.add_controller(&event_motion);
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}
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fn dispose(&self, _obj: &Self::Type) {
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@ -300,80 +318,65 @@ mod imp {
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}
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impl WidgetImpl for GraphView {
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fn snapshot(&self, widget: &Self::Type, snapshot: >k::Snapshot) {
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fn snapshot(&self, _widget: &Self::Type, snapshot: >k::Snapshot) {
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/* FIXME: A lot of hardcoded values in here.
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Try to use relative units (em) and colours from the theme as much as possible. */
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let alloc = widget.allocation();
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// Draw all children
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self.nodes
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.borrow()
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.values()
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.for_each(|node| self.instance().snapshot_child(node, snapshot));
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// Draw all links
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let link_cr = snapshot.append_cairo(&graphene::Rect::new(
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0.0,
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0.0,
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alloc.width() as f32,
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alloc.height() as f32,
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));
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for link in self.links.borrow().values() {
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if let Some((from_x, from_y, to_x, to_y)) = self.link_coordinates(link) {
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//trace!("from_x: {} from_y: {} to_x: {} to_y: {}", from_x, from_y, to_x, to_y);
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link_cr.set_line_width(link.thickness as f64);
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// Use dashed line for inactive links, full line otherwise.
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if link.active {
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link_cr.set_dash(&[], 0.0);
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self.draw_link(
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snapshot,
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link.active,
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link.selected(),
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link.thickness as f64,
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&graphene::Point::new(from_x as f32, from_y as f32),
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&graphene::Point::new(to_x as f32, to_y as f32),
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);
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} else {
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link_cr.set_dash(&[10.0, 5.0], 0.0);
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warn!("Could not get link coordinates: {:?}", link);
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}
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if link.selected() {
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link_cr.set_source_rgb(1.0, 0.18, 0.18);
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} else {
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link_cr.set_source_rgb(0.0, 0.0, 0.0);
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}
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link_cr.move_to(from_x, from_y);
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link_cr.line_to(to_x, to_y);
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link_cr.set_line_width(2.0);
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if let Err(e) = link_cr.stroke() {
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warn!("Failed to draw graphview links: {}", e);
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};
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} else {
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warn!("Could not get allocation of ports of link: {:?}", link);
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}
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if self.port_selected.borrow().is_some() {
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let port = self.port_selected.borrow();
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let port = port.as_ref().unwrap();
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let node = port
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.ancestor(Node::static_type())
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.expect("Unable to reach parent")
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.dynamic_cast::<Node>()
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.expect("Unable to cast to Node");
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let (from_x, from_y) = self.link_from_coordinates(node.id(), port.id());
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let (to_x, to_y) = self.mouse_position.get();
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self.draw_link(
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snapshot,
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false,
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false,
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2.0,
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&graphene::Point::new(from_x as f32, from_y as f32),
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&graphene::Point::new(to_x as f32, to_y as f32),
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);
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}
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}
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}
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impl GraphView {
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/// Retrieves coordinates for the drawn link to start at and to end at.
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///
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/// # Returns
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/// `Some((from_x, from_y, to_x, to_y))` if all objects the links refers to exist as widgets.
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pub fn link_coordinates(&self, link: &Link) -> Option<(f64, f64, f64, f64)> {
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fn link_from_coordinates(&self, node_from: u32, port_from: u32) -> (f64, f64) {
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let nodes = self.nodes.borrow();
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let from_node = nodes
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.get(&link.node_from)
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.unwrap_or_else(|| panic!("Unable to get node from {}", link.node_from));
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.get(&node_from)
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.unwrap_or_else(|| panic!("Unable to get node from {}", node_from));
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let from_port = from_node
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.port(link.port_from)
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.unwrap_or_else(|| panic!("Unable to get port from {}", link.port_from));
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let to_node = nodes
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.get(&link.node_to)
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.unwrap_or_else(|| panic!("Unable to get node to {}", link.node_to));
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let to_port = to_node
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.port(link.port_to)
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.unwrap_or_else(|| panic!("Unable to get port to {}", link.port_to));
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let (mut fx, mut fy, fw, fh) = (
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.port(port_from)
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.unwrap_or_else(|| panic!("Unable to get port from {}", port_from));
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let (mut from_x, mut from_y, fw, fh) = (
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from_port.allocation().x(),
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from_port.allocation().y(),
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from_port.allocation().width(),
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@ -382,11 +385,23 @@ mod imp {
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let (fnx, fny) = (from_node.allocation().x(), from_node.allocation().y());
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if let Some((port_x, port_y)) = from_port.translate_coordinates(from_node, 0.0, 0.0) {
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fx = fnx + fw + port_x as i32;
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fy = fny + (fh / 2) + port_y as i32;
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from_x = fnx + fw + port_x as i32;
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from_y = fny + (fh / 2) + port_y as i32;
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}
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let (mut tx, mut ty, th) = (
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(from_x as f64, from_y as f64)
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}
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fn link_to_coordinates(&self, node_to: u32, port_to: u32) -> (f64, f64) {
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let nodes = self.nodes.borrow();
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let to_node = nodes
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.get(&node_to)
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.unwrap_or_else(|| panic!("Unable to get node to {}", node_to));
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let to_port = to_node
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.port(port_to)
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.unwrap_or_else(|| panic!("Unable to get port to {}", port_to));
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let (mut to_x, mut to_y, th) = (
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to_port.allocation().x(),
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to_port.allocation().y(),
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to_port.allocation().height(),
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@ -395,11 +410,59 @@ mod imp {
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let (tnx, tny) = (to_node.allocation().x(), to_node.allocation().y());
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if let Some((port_x, port_y)) = to_port.translate_coordinates(to_node, 0.0, 0.0) {
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tx += tnx + port_x as i32;
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ty = tny + (th / 2) + port_y as i32;
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to_x += tnx + port_x as i32;
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to_y = tny + (th / 2) + port_y as i32;
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}
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//trace!("{} {} -> {} {}", fx, fy, tx, ty);
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Some((fx.into(), fy.into(), tx.into(), ty.into()))
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(to_x.into(), to_y.into())
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}
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/// Retrieves coordinates for the drawn link to start at and to end at.
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///
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/// # Returns
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/// `Some((from_x, from_y, to_x, to_y))` if all objects the links refers to exist as widgets.
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pub fn link_coordinates(&self, link: &Link) -> Option<(f64, f64, f64, f64)> {
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let (from_x, from_y) = self.link_from_coordinates(link.node_from, link.port_from);
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let (to_x, to_y) = self.link_to_coordinates(link.node_to, link.port_to);
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Some((from_x, from_y, to_x, to_y))
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}
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fn draw_link(
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&self,
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snapshot: >k::Snapshot,
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active: bool,
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selected: bool,
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thickness: f64,
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point_from: &graphene::Point,
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point_to: &graphene::Point,
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) {
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let alloc = self.instance().allocation();
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let link_cr = snapshot.append_cairo(&graphene::Rect::new(
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0.0,
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0.0,
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alloc.width() as f32,
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alloc.height() as f32,
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));
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link_cr.set_line_width(thickness);
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// Use dashed line for inactive links, full line otherwise.
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if active {
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link_cr.set_dash(&[], 0.0);
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} else {
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link_cr.set_dash(&[10.0, 5.0], 0.0);
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}
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if selected {
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link_cr.set_source_rgb(1.0, 0.18, 0.18);
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} else {
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link_cr.set_source_rgb(0.0, 0.0, 0.0);
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}
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link_cr.move_to(point_from.x() as f64, point_from.y() as f64);
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link_cr.line_to(point_to.x() as f64, point_to.y() as f64);
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link_cr.set_line_width(2.0);
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if let Err(e) = link_cr.stroke() {
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warn!("Failed to draw graphview links: {}", e);
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};
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}
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}
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}
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@ -1128,7 +1191,9 @@ impl GraphView {
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}
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fn set_selected_port(&self, port: Option<&Port>) {
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if port.is_some() {
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self.unselect_all();
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}
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let private = imp::GraphView::from_instance(self);
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*private.port_selected.borrow_mut() = port.cloned();
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}
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@ -1138,6 +1203,11 @@ impl GraphView {
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private.port_selected.borrow_mut()
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}
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fn set_mouse_position(&self, x: f64, y: f64) {
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let private = imp::GraphView::from_instance(self);
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private.mouse_position.set((x, y));
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}
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fn ports_compatible(&self, to_port: &Port) -> bool {
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let current_port = self.selected_port().to_owned();
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if let Some(from_port) = current_port {
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