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Draw relationship lines for items offscreen #60085

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merged 1 commit into from
Apr 11, 2022
Merged

Draw relationship lines for items offscreen #60085

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120 changes: 67 additions & 53 deletions scene/gui/tree.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -2088,90 +2088,104 @@ int Tree::draw_item(const Point2i &p_pos, const Point2 &p_draw_ofs, const Size2
}

if (!p_item->collapsed) { /* if not collapsed, check the children */

TreeItem *c = p_item->first_child;

int base_ofs = children_pos.y - cache.offset.y + p_draw_ofs.y;
int prev_ofs = base_ofs;
int prev_hl_ofs = base_ofs;

while (c) {
int child_h = -1;
if (htotal >= 0) {
int child_h = draw_item(children_pos, p_draw_ofs, p_draw_size, c);
child_h = draw_item(children_pos, p_draw_ofs, p_draw_size, c);
}

// Draw relationship lines.
if (cache.draw_relationship_lines > 0 && (!hide_root || c->parent != root)) {
int root_ofs = children_pos.x + ((p_item->disable_folding || hide_folding) ? cache.hseparation : cache.item_margin);
int parent_ofs = p_pos.x + cache.item_margin;
Point2i root_pos = Point2i(root_ofs, children_pos.y + label_h / 2) - cache.offset + p_draw_ofs;
// Draw relationship lines.
if (cache.draw_relationship_lines > 0 && (!hide_root || c->parent != root)) {
int root_ofs = children_pos.x + ((p_item->disable_folding || hide_folding) ? cache.hseparation : cache.item_margin);
int parent_ofs = p_pos.x + cache.item_margin;
Point2i root_pos = Point2i(root_ofs, children_pos.y + label_h / 2) - cache.offset + p_draw_ofs;

if (c->get_first_child() != nullptr) {
root_pos -= Point2i(cache.arrow->get_width(), 0);
}
if (c->get_first_child() != nullptr) {
root_pos -= Point2i(cache.arrow->get_width(), 0);
}

float line_width = cache.relationship_line_width * Math::round(cache.base_scale);
float parent_line_width = cache.parent_hl_line_width * Math::round(cache.base_scale);
float children_line_width = cache.children_hl_line_width * Math::round(cache.base_scale);
float line_width = cache.relationship_line_width * Math::round(cache.base_scale);
float parent_line_width = cache.parent_hl_line_width * Math::round(cache.base_scale);
float children_line_width = cache.children_hl_line_width * Math::round(cache.base_scale);

Point2i parent_pos = Point2i(parent_ofs - cache.arrow->get_width() / 2, p_pos.y + label_h / 2 + cache.arrow->get_height() / 2) - cache.offset + p_draw_ofs;
Point2i parent_pos = Point2i(parent_ofs - cache.arrow->get_width() / 2, p_pos.y + label_h / 2 + cache.arrow->get_height() / 2) - cache.offset + p_draw_ofs;

int more_prev_ofs = 0;
int more_prev_ofs = 0;

if (root_pos.y + line_width >= 0) {
if (rtl) {
root_pos.x = get_size().width - root_pos.x;
parent_pos.x = get_size().width - parent_pos.x;
}
if (root_pos.y + line_width >= 0) {
if (rtl) {
root_pos.x = get_size().width - root_pos.x;
parent_pos.x = get_size().width - parent_pos.x;
}

// Order of parts on this bend: the horizontal line first, then the vertical line.
if (_is_branch_selected(c)) {
// If this item or one of its children is selected, we draw the line using parent highlight style.
// Order of parts on this bend: the horizontal line first, then the vertical line.
if (_is_branch_selected(c)) {
// If this item or one of its children is selected, we draw the line using parent highlight style.
if (htotal >= 0) {
RenderingServer::get_singleton()->canvas_item_add_line(ci, root_pos, Point2i(parent_pos.x + Math::floor(parent_line_width / 2), root_pos.y), cache.parent_hl_line_color, parent_line_width);
}
RenderingServer::get_singleton()->canvas_item_add_line(ci, Point2i(parent_pos.x, root_pos.y + Math::floor(parent_line_width / 2)), Point2i(parent_pos.x, prev_hl_ofs), cache.parent_hl_line_color, parent_line_width);

more_prev_ofs = cache.parent_hl_line_margin;
prev_hl_ofs = root_pos.y + Math::floor(parent_line_width / 2);
} else if (p_item->is_selected(0)) {
// If parent item is selected (but this item is not), we draw the line using children highlight style.
// Siblings of the selected branch can be drawn with a slight offset and their vertical line must appear as highlighted.
if (_is_sibling_branch_selected(c)) {
if (htotal >= 0) {
RenderingServer::get_singleton()->canvas_item_add_line(ci, root_pos, Point2i(parent_pos.x + Math::floor(parent_line_width / 2), root_pos.y), cache.children_hl_line_color, children_line_width);
}
RenderingServer::get_singleton()->canvas_item_add_line(ci, Point2i(parent_pos.x, root_pos.y + Math::floor(parent_line_width / 2)), Point2i(parent_pos.x, prev_hl_ofs), cache.parent_hl_line_color, parent_line_width);

more_prev_ofs = cache.parent_hl_line_margin;
prev_hl_ofs = root_pos.y + Math::floor(parent_line_width / 2);
} else if (p_item->is_selected(0)) {
// If parent item is selected (but this item is not), we draw the line using children highlight style.
// Siblings of the selected branch can be drawn with a slight offset and their vertical line must appear as highlighted.
if (_is_sibling_branch_selected(c)) {
RenderingServer::get_singleton()->canvas_item_add_line(ci, root_pos, Point2i(parent_pos.x + Math::floor(parent_line_width / 2), root_pos.y), cache.children_hl_line_color, children_line_width);
RenderingServer::get_singleton()->canvas_item_add_line(ci, Point2i(parent_pos.x, root_pos.y + Math::floor(parent_line_width / 2)), Point2i(parent_pos.x, prev_hl_ofs), cache.parent_hl_line_color, parent_line_width);

prev_hl_ofs = root_pos.y + Math::floor(parent_line_width / 2);
} else {
} else {
if (htotal >= 0) {
RenderingServer::get_singleton()->canvas_item_add_line(ci, root_pos, Point2i(parent_pos.x + Math::floor(children_line_width / 2), root_pos.y), cache.children_hl_line_color, children_line_width);
RenderingServer::get_singleton()->canvas_item_add_line(ci, Point2i(parent_pos.x, root_pos.y + Math::floor(children_line_width / 2)), Point2i(parent_pos.x, prev_ofs + Math::floor(children_line_width / 2)), cache.children_hl_line_color, children_line_width);
}
} else {
// If nothing of the above is true, we draw the line using normal style.
// Siblings of the selected branch can be drawn with a slight offset and their vertical line must appear as highlighted.
if (_is_sibling_branch_selected(c)) {
RenderingServer::get_singleton()->canvas_item_add_line(ci, Point2i(parent_pos.x, root_pos.y + Math::floor(children_line_width / 2)), Point2i(parent_pos.x, prev_ofs + Math::floor(children_line_width / 2)), cache.children_hl_line_color, children_line_width);
}
} else {
// If nothing of the above is true, we draw the line using normal style.
// Siblings of the selected branch can be drawn with a slight offset and their vertical line must appear as highlighted.
if (_is_sibling_branch_selected(c)) {
if (htotal >= 0) {
RenderingServer::get_singleton()->canvas_item_add_line(ci, root_pos, Point2i(parent_pos.x + cache.parent_hl_line_margin, root_pos.y), cache.relationship_line_color, line_width);
RenderingServer::get_singleton()->canvas_item_add_line(ci, Point2i(parent_pos.x, root_pos.y + Math::floor(parent_line_width / 2)), Point2i(parent_pos.x, prev_hl_ofs), cache.parent_hl_line_color, parent_line_width);
}
RenderingServer::get_singleton()->canvas_item_add_line(ci, Point2i(parent_pos.x, root_pos.y + Math::floor(parent_line_width / 2)), Point2i(parent_pos.x, prev_hl_ofs), cache.parent_hl_line_color, parent_line_width);

prev_hl_ofs = root_pos.y + Math::floor(parent_line_width / 2);
} else {
prev_hl_ofs = root_pos.y + Math::floor(parent_line_width / 2);
} else {
if (htotal >= 0) {
RenderingServer::get_singleton()->canvas_item_add_line(ci, root_pos, Point2i(parent_pos.x + Math::floor(line_width / 2), root_pos.y), cache.relationship_line_color, line_width);
RenderingServer::get_singleton()->canvas_item_add_line(ci, Point2i(parent_pos.x, root_pos.y + Math::floor(line_width / 2)), Point2i(parent_pos.x, prev_ofs + Math::floor(line_width / 2)), cache.relationship_line_color, line_width);
}
RenderingServer::get_singleton()->canvas_item_add_line(ci, Point2i(parent_pos.x, root_pos.y + Math::floor(line_width / 2)), Point2i(parent_pos.x, prev_ofs + Math::floor(line_width / 2)), cache.relationship_line_color, line_width);
}
}

prev_ofs = root_pos.y + more_prev_ofs;
}

if (child_h < 0) {
if (cache.draw_relationship_lines == 0) {
return -1; // break, stop drawing, no need to anymore
}
prev_ofs = root_pos.y + more_prev_ofs;
}

htotal = -1;
children_pos.y = cache.offset.y + p_draw_size.height;
} else {
htotal += child_h;
children_pos.y += child_h;
if (child_h < 0) {
if (htotal == -1) {
break; // Last loop done, stop.
}

if (cache.draw_relationship_lines == 0) {
return -1; // No need to draw anymore, full stop.
}

htotal = -1;
children_pos.y = cache.offset.y + p_draw_size.height;
} else {
htotal += child_h;
children_pos.y += child_h;
}

c = c->next;
Expand Down