Added icons and API for indeterminate checkmarks for the Tree class.

doc/classes/Tree.xml

@@ -552,6 +552,9 @@
 		<theme_item name="hseparation" data_type="constant" type="int" default="4">
 			The horizontal space between item cells. This is also used as the margin at the start of an item when folding is disabled.
 		</theme_item>
+		<theme_item name="indeterminate" data_type="icon" type="Texture2D">
+			The check icon to display when the [constant TreeItem.CELL_MODE_CHECK] mode cell is indeterminate.
+		</theme_item>
 		<theme_item name="item_margin" data_type="constant" type="int" default="12">
 			The horizontal margin at the start of an item. This is used when folding is enabled for the item.
 		</theme_item>

doc/classes/TreeItem.xml

@@ -340,6 +340,13 @@
 				Returns [code]true[/code] if column [code]column[/code] is editable.
 			</description>
 		</method>
+		<method name="is_indeterminate" qualifiers="const">
+			<return type="bool" />
+			<argument index="0" name="column" type="int" />
+			<description>
+				Returns [code]true[/code] if the given column is indeterminate.
+			</description>
+		</method>
 		<method name="is_selectable" qualifiers="const">
 			<return type="bool" />
 			<argument index="0" name="column" type="int" />
@@ -415,7 +422,7 @@
 			<argument index="0" name="column" type="int" />
 			<argument index="1" name="checked" type="bool" />
 			<description>
-				If [code]true[/code], the column [code]column[/code] is checked.
+				If [code]true[/code], the column [code]column[/code] is checked. Clears column's indeterminate status.
 			</description>
 		</method>
 		<method name="set_custom_as_button">
@@ -507,6 +514,15 @@
 				Sets the given column's icon's texture region.
 			</description>
 		</method>
+		<method name="set_indeterminate">
+			<return type="void" />
+			<argument index="0" name="column" type="int" />
+			<argument index="1" name="indeterminate" type="bool" />
+			<description>
+				If [code]true[/code], the column [code]column[/code] is marked indeterminate.
+				[b]Note:[/b] If set [code]true[/code] from [code]false[/code], then column is cleared of checked status.
+			</description>
+		</method>
 		<method name="set_language">
 			<return type="void" />
 			<argument index="0" name="column" type="int" />

editor/editor_themes.cpp

@@ -219,6 +219,7 @@ void editor_register_and_generate_icons(Ref<Theme> p_theme, bool p_dark_theme =
 		exceptions.insert("DefaultProjectIcon");
 		exceptions.insert("GuiChecked");
 		exceptions.insert("GuiRadioChecked");
+		exceptions.insert("GuiIndeterminate");
 		exceptions.insert("GuiCloseCustomizable");
 		exceptions.insert("GuiGraphNodePort");
 		exceptions.insert("GuiResizer");
@@ -812,6 +813,7 @@ Ref<Theme> create_editor_theme(const Ref<Theme> p_theme) {
 
 	// Tree
 	theme->set_icon("checked", "Tree", theme->get_icon("GuiChecked", "EditorIcons"));
+	theme->set_icon("indeterminate", "Tree", theme->get_icon("GuiIndeterminate", "EditorIcons"));
 	theme->set_icon("unchecked", "Tree", theme->get_icon("GuiUnchecked", "EditorIcons"));
 	theme->set_icon("arrow", "Tree", theme->get_icon("GuiTreeArrowDown", "EditorIcons"));
 	theme->set_icon("arrow_collapsed", "Tree", theme->get_icon("GuiTreeArrowRight", "EditorIcons"));

editor/icons/GuiIndeterminate.svg

@@ -0,0 +1 @@
+<svg clip-rule="evenodd" fill-rule="evenodd" stroke-linejoin="round" stroke-miterlimit="2" viewBox="0 0 16 16" xmlns="http://www.w3.org/2000/svg"><path d="m3.333 1c-1.288 0-2.333 1.045-2.333 2.333v9.334c0 1.288 1.045 2.333 2.333 2.333h9.334c1.288 0 2.333-1.045 2.333-2.333v-9.334c0-1.288-1.045-2.333-2.333-2.333z" fill="#699ce8" fill-rule="nonzero"/><path d="m3 7h10.058v2.12h-10.058z" fill="#fff" transform="matrix(.99428 0 0 .943295 .017161 .396936)"/></svg>

scene/gui/tree.cpp

@@ -167,6 +167,18 @@ TreeItem::TreeCellMode TreeItem::get_cell_mode(int p_column) const {
 void TreeItem::set_checked(int p_column, bool p_checked) {
 	ERR_FAIL_INDEX(p_column, cells.size());
 	cells.write[p_column].checked = p_checked;
+	cells.write[p_column].indeterminate = false;
+	_changed_notify(p_column);
+}
+
+void TreeItem::set_indeterminate(int p_column, bool p_indeterminate) {
+	ERR_FAIL_INDEX(p_column, cells.size());
+	// Prevent uncheck if indeterminate set to false twice
+	if (p_indeterminate == cells[p_column].indeterminate) {
+		return;
+	}
+	cells.write[p_column].indeterminate = p_indeterminate;
+	cells.write[p_column].checked = false;
 	_changed_notify(p_column);
 }
 
@@ -175,6 +187,11 @@ bool TreeItem::is_checked(int p_column) const {
 	return cells[p_column].checked;
 }
 
+bool TreeItem::is_indeterminate(int p_column) const {
+	ERR_FAIL_INDEX_V(p_column, cells.size(), false);
+	return cells[p_column].indeterminate;
+}
+
 void TreeItem::set_text(int p_column, String p_text) {
 	ERR_FAIL_INDEX(p_column, cells.size());
 	cells.write[p_column].text = p_text;
@@ -1042,7 +1059,9 @@ void TreeItem::_bind_methods() {
 	ClassDB::bind_method(D_METHOD("get_cell_mode", "column"), &TreeItem::get_cell_mode);
 
 	ClassDB::bind_method(D_METHOD("set_checked", "column", "checked"), &TreeItem::set_checked);
+	ClassDB::bind_method(D_METHOD("set_indeterminate", "column", "indeterminate"), &TreeItem::set_indeterminate);
 	ClassDB::bind_method(D_METHOD("is_checked", "column"), &TreeItem::is_checked);
+	ClassDB::bind_method(D_METHOD("is_indeterminate", "column"), &TreeItem::is_indeterminate);
 
 	ClassDB::bind_method(D_METHOD("set_text", "column", "text"), &TreeItem::set_text);
 	ClassDB::bind_method(D_METHOD("get_text", "column"), &TreeItem::get_text);
@@ -1228,6 +1247,7 @@ void Tree::update_cache() {
 
 	cache.checked = get_theme_icon(SNAME("checked"));
 	cache.unchecked = get_theme_icon(SNAME("unchecked"));
+	cache.indeterminate = get_theme_icon(SNAME("indeterminate"));
 	if (is_layout_rtl()) {
 		cache.arrow_collapsed = get_theme_icon(SNAME("arrow_collapsed_mirrored"));
 	} else {
@@ -1721,10 +1741,13 @@ int Tree::draw_item(const Point2i &p_pos, const Point2 &p_draw_ofs, const Size2
 				case TreeItem::CELL_MODE_CHECK: {
 					Ref<Texture2D> checked = cache.checked;
 					Ref<Texture2D> unchecked = cache.unchecked;
+					Ref<Texture2D> indeterminate = cache.indeterminate;
 					Point2i check_ofs = item_rect.position;
 					check_ofs.y += Math::floor((real_t)(item_rect.size.y - checked->get_height()) / 2);
 
-					if (p_item->cells[i].checked) {
+					if (p_item->cells[i].indeterminate) {
+						indeterminate->draw(ci, check_ofs);
+					} else if (p_item->cells[i].checked) {
 						checked->draw(ci, check_ofs);
 					} else {
 						unchecked->draw(ci, check_ofs);

scene/gui/tree.h

@@ -82,6 +82,7 @@ private:
 		int icon_max_w = 0;
 		bool expr = false;
 		bool checked = false;
+		bool indeterminate = false;
 		bool editable = false;
 		bool selected = false;
 		bool selectable = true;
@@ -209,7 +210,9 @@ public:
 
 	/* check mode */
 	void set_checked(int p_column, bool p_checked);
+	void set_indeterminate(int p_column, bool p_indeterminate);
 	bool is_checked(int p_column) const;
+	bool is_indeterminate(int p_column) const;
 
 	void set_text(int p_column, String p_text);
 	String get_text(int p_column) const;
@@ -491,6 +494,7 @@ private:
 
 		Ref<Texture2D> checked;
 		Ref<Texture2D> unchecked;
+		Ref<Texture2D> indeterminate;
 		Ref<Texture2D> arrow_collapsed;
 		Ref<Texture2D> arrow;
 		Ref<Texture2D> select_arrow;

scene/resources/default_theme/default_theme.cpp

@@ -704,6 +704,7 @@ void fill_default_theme(Ref<Theme> &theme, const Ref<Font> &default_font, const
 
 	theme->set_icon("checked", "Tree", make_icon(checked_png));
 	theme->set_icon("unchecked", "Tree", make_icon(unchecked_png));
+	theme->set_icon("indeterminate", "Tree", make_icon(indeterminate_png));
 	theme->set_icon("updown", "Tree", make_icon(updown_png));
 	theme->set_icon("select_arrow", "Tree", make_icon(dropdown_png));
 	theme->set_icon("arrow", "Tree", make_icon(arrow_down_png));

scene/resources/default_theme/theme_data.h

@@ -214,6 +214,14 @@ static const unsigned char icon_zoom_reset_png[] = {
 	0x89, 0x50, 0x4e, 0x47, 0xd, 0xa, 0x1a, 0xa, 0x0, 0x0, 0x0, 0xd, 0x49, 0x48, 0x44, 0x52, 0x0, 0x0, 0x0, 0x10, 0x0, 0x0, 0x0, 0x10, 0x8, 0x4, 0x0, 0x0, 0x0, 0xb5, 0xfa, 0x37, 0xea, 0x0, 0x0, 0x0, 0x33, 0x49, 0x44, 0x41, 0x54, 0x78, 0xda, 0x63, 0x20, 0xa, 0x3c, 0xc, 0x7b, 0xf0, 0xff, 0xc1, 0x7f, 0x9c, 0x22, 0xcf, 0x44, 0x1e, 0xbc, 0x84, 0x72, 0xb1, 0x8b, 0x3c, 0x58, 0x5, 0xe4, 0x40, 0xb8, 0x38, 0x45, 0x18, 0x60, 0x5c, 0x84, 0x30, 0x59, 0xa, 0xa0, 0x80, 0x6e, 0xa, 0x86, 0x92, 0x2f, 0x8, 0x3, 0x0, 0x69, 0xc8, 0x86, 0x87, 0x72, 0xca, 0x85, 0x23, 0x0, 0x0, 0x0, 0x0, 0x49, 0x45, 0x4e, 0x44, 0xae, 0x42, 0x60, 0x82
 };
 
+static const unsigned char indeterminate_png[] = {
+	0x89, 0x50, 0x4e, 0x47, 0xd, 0xa, 0x1a, 0xa, 0x0, 0x0, 0x0, 0xd, 0x49, 0x48, 0x44, 0x52, 0x0, 0x0, 0x0, 0x10, 0x0, 0x0, 0x0, 0x10, 0x8, 0x3, 0x0, 0x0, 0x0, 0x28, 0x2d, 0xf, 0x53, 0x0, 0x0, 0x0, 0x36, 0x50, 0x4c, 0x54, 0x45, 0x0, 0x0, 0x0, 0x4d, 0x4b, 0x59, 0x4d, 0x4b, 0x59, 0x4d, 0x4b, 0x59, 0x4d, 0x4b, 0x59, 0x4d, 0x4b, 0x59, 0x38, 0x37, 0x40, 0x20, 0x20, 0x24, 0x20, 0x20, 0x24, 0x38, 0x36, 0x40, 0x20, 0x20, 0x25, 0x1e, 0x1e, 0x22, 0x1f, 0x1f, 0x23, 0x20, 0x20, 0x24, 0x22, 0x22, 0x27, 0x23, 0x23, 0x28, 0x25, 0x25, 0x2a, 0xfe, 0xfe, 0xfe, 0x98, 0x4d, 0x2d, 0x9a, 0x0, 0x0, 0x0, 0x12, 0x74, 0x52, 0x4e, 0x53, 0x0, 0x7, 0x27, 0x50, 0x66, 0x68, 0xb4, 0xfa, 0xfb, 0xb4, 0xfa, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x1c, 0x77, 0x5e, 0x7f, 0x0, 0x0, 0x0, 0x59, 0x49, 0x44, 0x41, 0x54, 0x18, 0x95, 0x85, 0xcf, 0xc1, 0x12, 0x80, 0x20, 0x8, 0x45, 0xd1, 0x4, 0x14, 0xd, 0xc5, 0xfa, 0xff, 0x9f, 0x8d, 0x9c, 0x6c, 0x9a, 0xb4, 0xe9, 0x2e, 0xcf, 0x42, 0x9e, 0xcb, 0x32, 0xe4, 0x0, 0xc9, 0xb7, 0x8, 0xc1, 0x19, 0x40, 0x60, 0xc9, 0x2d, 0xe1, 0x0, 0x6, 0xc8, 0x45, 0x6b, 0x4b, 0xb, 0xa3, 0x1, 0x89, 0x6e, 0x57, 0x2a, 0x64, 0xe0, 0x73, 0xed, 0x50, 0xb3, 0x9f, 0xc3, 0x7e, 0xf7, 0x5, 0x7f, 0x6f, 0xc, 0x67, 0x9f, 0xc3, 0xe2, 0x39, 0xc, 0x52, 0xec, 0xd3, 0xd7, 0x4, 0xb3, 0xcf, 0xbd, 0x3a, 0x0, 0xa0, 0xa2, 0x8, 0xbc, 0xf6, 0x84, 0x3a, 0x9d, 0x0, 0x0, 0x0, 0x0, 0x49, 0x45, 0x4e, 0x44, 0xae, 0x42, 0x60, 0x82
+};
+
+static const unsigned char indeterminate_disabled_png[] = {
+	0x89, 0x50, 0x4e, 0x47, 0xd, 0xa, 0x1a, 0xa, 0x0, 0x0, 0x0, 0xd, 0x49, 0x48, 0x44, 0x52, 0x0, 0x0, 0x0, 0x10, 0x0, 0x0, 0x0, 0x10, 0x8, 0x3, 0x0, 0x0, 0x0, 0x28, 0x2d, 0xf, 0x53, 0x0, 0x0, 0x0, 0x3c, 0x50, 0x4c, 0x54, 0x45, 0x0, 0x0, 0x0, 0x7a, 0x78, 0x83, 0x7a, 0x78, 0x83, 0x7a, 0x78, 0x83, 0x7a, 0x78, 0x83, 0x7a, 0x78, 0x83, 0x6a, 0x69, 0x70, 0x6a, 0x68, 0x70, 0x58, 0x58, 0x5c, 0x58, 0x58, 0x5b, 0x58, 0x58, 0x5b, 0x5c, 0x5c, 0x5f, 0x5a, 0x5a, 0x5e, 0x59, 0x59, 0x5d, 0x58, 0x58, 0x5b, 0x57, 0x57, 0x5a, 0x56, 0x56, 0x59, 0xff, 0x0, 0x0, 0xff, 0xff, 0xff, 0x9e, 0x9e, 0x9e, 0x8c, 0x93, 0x80, 0x95, 0x0, 0x0, 0x0, 0x14, 0x74, 0x52, 0x4e, 0x53, 0x0, 0x7, 0x27, 0x50, 0x66, 0x68, 0xb4, 0xb4, 0xfa, 0xfa, 0xfb, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x6c, 0xb9, 0x8d, 0x1e, 0x0, 0x0, 0x0, 0x59, 0x49, 0x44, 0x41, 0x54, 0x18, 0x95, 0x85, 0xcf, 0xd1, 0xe, 0x80, 0x20, 0x8, 0x85, 0xe1, 0x4, 0xd4, 0x30, 0x51, 0xb6, 0xde, 0xff, 0x5d, 0x23, 0x97, 0xad, 0xa5, 0xad, 0xff, 0xf2, 0xbb, 0x90, 0xe3, 0xb2, 0xc, 0x39, 0x40, 0xf2, 0x2d, 0x42, 0x70, 0x6, 0x10, 0x58, 0x6b, 0x4b, 0x39, 0x80, 0x1, 0x72, 0x91, 0xdc, 0x92, 0xc2, 0x68, 0x40, 0x2a, 0xdb, 0x95, 0x28, 0x19, 0xf8, 0x9a, 0x3b, 0xe4, 0xea, 0xe7, 0xb0, 0xdf, 0x7d, 0xc1, 0xdf, 0x1b, 0xc3, 0xd9, 0xe7, 0xb0, 0x74, 0xe, 0x83, 0x98, 0xfa, 0xf4, 0x35, 0xc2, 0xec, 0x73, 0xaf, 0xe, 0x57, 0x20, 0x8, 0x2c, 0x1a, 0x56, 0xe5, 0x32, 0x0, 0x0, 0x0, 0x0, 0x49, 0x45, 0x4e, 0x44, 0xae, 0x42, 0x60, 0x82
+};
+
 static const unsigned char line_edit_png[] = {
 	0x89, 0x50, 0x4e, 0x47, 0xd, 0xa, 0x1a, 0xa, 0x0, 0x0, 0x0, 0xd, 0x49, 0x48, 0x44, 0x52, 0x0, 0x0, 0x0, 0xa, 0x0, 0x0, 0x0, 0xa, 0x4, 0x3, 0x0, 0x0, 0x0, 0x7f, 0x1c, 0xd2, 0x8e, 0x0, 0x0, 0x0, 0x2a, 0x50, 0x4c, 0x54, 0x45, 0x17, 0x16, 0x1a, 0x1d, 0x1c, 0x21, 0x20, 0x1e, 0x24, 0x21, 0x1f, 0x25, 0x1d, 0x1c, 0x21, 0x20, 0x1e, 0x24, 0x1d, 0x1c, 0x21, 0x1d, 0x1c, 0x21, 0x24, 0x22, 0x29, 0x28, 0x26, 0x2d, 0x28, 0x26, 0x2e, 0x2b, 0x2a, 0x31, 0x2c, 0x2a, 0x32, 0xff, 0xff, 0xff, 0xb9, 0x11, 0x56, 0x3e, 0x0, 0x0, 0x0, 0x8, 0x74, 0x52, 0x4e, 0x53, 0x6f, 0xef, 0xf7, 0xf7, 0xf0, 0xf9, 0xf1, 0xee, 0xcf, 0x21, 0xd2, 0xdf, 0x0, 0x0, 0x0, 0x2d, 0x49, 0x44, 0x41, 0x54, 0x8, 0xd7, 0x63, 0x60, 0x54, 0x36, 0x36, 0x12, 0x60, 0xf0, 0x98, 0xb5, 0x6a, 0x65, 0xb, 0x43, 0xe4, 0x9e, 0x33, 0xa7, 0xa7, 0x32, 0x58, 0x9d, 0x39, 0x73, 0x66, 0x31, 0x16, 0x12, 0x22, 0xb, 0x52, 0xd9, 0xc6, 0xc0, 0x2, 0xd4, 0x55, 0x0, 0x0, 0xc, 0x14, 0x1a, 0x90, 0x55, 0x1a, 0xec, 0xdb, 0x0, 0x0, 0x0, 0x0, 0x49, 0x45, 0x4e, 0x44, 0xae, 0x42, 0x60, 0x82
 };