Merge pull request #79563 from danny88881/drag-and-drop-text-setting

Add drag'n'drop text option for `LineEdit` and `RichTextLabel`

doc/classes/LineEdit.xml

@@ -210,6 +210,9 @@
 		<member name="deselect_on_focus_loss_enabled" type="bool" setter="set_deselect_on_focus_loss_enabled" getter="is_deselect_on_focus_loss_enabled" default="true">
 			If [code]true[/code], the selected text will be deselected when focus is lost.
 		</member>
+		<member name="drag_and_drop_selection_enabled" type="bool" setter="set_drag_and_drop_selection_enabled" getter="is_drag_and_drop_selection_enabled" default="true">
+			If [code]true[/code], allow drag and drop of selected text.
+		</member>
 		<member name="draw_control_chars" type="bool" setter="set_draw_control_chars" getter="get_draw_control_chars" default="false">
 			If [code]true[/code], control characters are displayed.
 		</member>

doc/classes/RichTextLabel.xml

@@ -551,6 +551,9 @@
 		<member name="deselect_on_focus_loss_enabled" type="bool" setter="set_deselect_on_focus_loss_enabled" getter="is_deselect_on_focus_loss_enabled" default="true">
 			If [code]true[/code], the selected text will be deselected when focus is lost.
 		</member>
+		<member name="drag_and_drop_selection_enabled" type="bool" setter="set_drag_and_drop_selection_enabled" getter="is_drag_and_drop_selection_enabled" default="true">
+			If [code]true[/code], allow drag and drop of selected text.
+		</member>
 		<member name="fit_content" type="bool" setter="set_fit_content" getter="is_fit_content_enabled" default="false">
 			If [code]true[/code], the label's minimum size will be automatically updated to fit its content, matching the behavior of [Label].
 		</member>

scene/gui/line_edit.cpp

@@ -341,13 +341,15 @@ void LineEdit::gui_input(const Ref<InputEvent> &p_event) {
 				}
 
 				selection.drag_attempt = false;
-
+				if (!selection.double_click) {
-				if ((caret_column < selection.begin) || (caret_column > selection.end) || !selection.enabled) {
+					bool is_inside_sel = selection.enabled && caret_column >= selection.begin && caret_column <= selection.end;
+					if (drag_and_drop_selection_enabled && is_inside_sel) {
+						selection.drag_attempt = true;
+					} else {
 						deselect();
 						selection.start_column = caret_column;
 						selection.creating = true;
-				} else if (selection.enabled && !selection.double_click) {
+					}
-					selection.drag_attempt = true;
 				}
 			}
 
@@ -2224,6 +2226,14 @@ bool LineEdit::is_deselect_on_focus_loss_enabled() const {
 	return deselect_on_focus_loss_enabled;
 }
 
+void LineEdit::set_drag_and_drop_selection_enabled(const bool p_enabled) {
+	drag_and_drop_selection_enabled = p_enabled;
+}
+
+bool LineEdit::is_drag_and_drop_selection_enabled() const {
+	return drag_and_drop_selection_enabled;
+}
+
 void LineEdit::set_right_icon(const Ref<Texture2D> &p_icon) {
 	if (right_icon == p_icon) {
 		return;
@@ -2570,6 +2580,8 @@ void LineEdit::_bind_methods() {
 	ClassDB::bind_method(D_METHOD("is_selecting_enabled"), &LineEdit::is_selecting_enabled);
 	ClassDB::bind_method(D_METHOD("set_deselect_on_focus_loss_enabled", "enable"), &LineEdit::set_deselect_on_focus_loss_enabled);
 	ClassDB::bind_method(D_METHOD("is_deselect_on_focus_loss_enabled"), &LineEdit::is_deselect_on_focus_loss_enabled);
+	ClassDB::bind_method(D_METHOD("set_drag_and_drop_selection_enabled", "enable"), &LineEdit::set_drag_and_drop_selection_enabled);
+	ClassDB::bind_method(D_METHOD("is_drag_and_drop_selection_enabled"), &LineEdit::is_drag_and_drop_selection_enabled);
 	ClassDB::bind_method(D_METHOD("set_right_icon", "icon"), &LineEdit::set_right_icon);
 	ClassDB::bind_method(D_METHOD("get_right_icon"), &LineEdit::get_right_icon);
 	ClassDB::bind_method(D_METHOD("set_flat", "enabled"), &LineEdit::set_flat);
@@ -2638,6 +2650,7 @@ void LineEdit::_bind_methods() {
 	ADD_PROPERTY(PropertyInfo(Variant::BOOL, "middle_mouse_paste_enabled"), "set_middle_mouse_paste_enabled", "is_middle_mouse_paste_enabled");
 	ADD_PROPERTY(PropertyInfo(Variant::BOOL, "selecting_enabled"), "set_selecting_enabled", "is_selecting_enabled");
 	ADD_PROPERTY(PropertyInfo(Variant::BOOL, "deselect_on_focus_loss_enabled"), "set_deselect_on_focus_loss_enabled", "is_deselect_on_focus_loss_enabled");
+	ADD_PROPERTY(PropertyInfo(Variant::BOOL, "drag_and_drop_selection_enabled"), "set_drag_and_drop_selection_enabled", "is_drag_and_drop_selection_enabled");
 	ADD_PROPERTY(PropertyInfo(Variant::OBJECT, "right_icon", PROPERTY_HINT_RESOURCE_TYPE, "Texture"), "set_right_icon", "get_right_icon");
 	ADD_PROPERTY(PropertyInfo(Variant::BOOL, "flat"), "set_flat", "is_flat");
 	ADD_PROPERTY(PropertyInfo(Variant::BOOL, "draw_control_chars"), "set_draw_control_chars", "get_draw_control_chars");

scene/gui/line_edit.h

@@ -106,6 +106,7 @@ private:
 
 	bool selecting_enabled = true;
 	bool deselect_on_focus_loss_enabled = true;
+	bool drag_and_drop_selection_enabled = true;
 
 	bool context_menu_enabled = true;
 	PopupMenu *menu = nullptr;
@@ -367,6 +368,9 @@ public:
 	void set_deselect_on_focus_loss_enabled(const bool p_enabled);
 	bool is_deselect_on_focus_loss_enabled() const;
 
+	void set_drag_and_drop_selection_enabled(const bool p_enabled);
+	bool is_drag_and_drop_selection_enabled() const;
+
 	void set_right_icon(const Ref<Texture2D> &p_icon);
 	Ref<Texture2D> get_right_icon();
 

scene/gui/rich_text_label.cpp

@@ -1954,7 +1954,7 @@ void RichTextLabel::gui_input(const Ref<InputEvent> &p_event) {
 
 						// Erase previous selection.
 						if (selection.active) {
-							if (_is_click_inside_selection()) {
+							if (drag_and_drop_selection_enabled && _is_click_inside_selection()) {
 								selection.drag_attempt = true;
 								selection.click_item = nullptr;
 							} else {
@@ -5317,6 +5317,14 @@ bool RichTextLabel::is_deselect_on_focus_loss_enabled() const {
 	return deselect_on_focus_loss_enabled;
 }
 
+void RichTextLabel::set_drag_and_drop_selection_enabled(const bool p_enabled) {
+	drag_and_drop_selection_enabled = p_enabled;
+}
+
+bool RichTextLabel::is_drag_and_drop_selection_enabled() const {
+	return drag_and_drop_selection_enabled;
+}
+
 int RichTextLabel::get_selection_from() const {
 	if (!selection.active || !selection.enabled) {
 		return -1;
@@ -5647,6 +5655,9 @@ void RichTextLabel::_bind_methods() {
 	ClassDB::bind_method(D_METHOD("set_deselect_on_focus_loss_enabled", "enable"), &RichTextLabel::set_deselect_on_focus_loss_enabled);
 	ClassDB::bind_method(D_METHOD("is_deselect_on_focus_loss_enabled"), &RichTextLabel::is_deselect_on_focus_loss_enabled);
 
+	ClassDB::bind_method(D_METHOD("set_drag_and_drop_selection_enabled", "enable"), &RichTextLabel::set_drag_and_drop_selection_enabled);
+	ClassDB::bind_method(D_METHOD("is_drag_and_drop_selection_enabled"), &RichTextLabel::is_drag_and_drop_selection_enabled);
+
 	ClassDB::bind_method(D_METHOD("get_selection_from"), &RichTextLabel::get_selection_from);
 	ClassDB::bind_method(D_METHOD("get_selection_to"), &RichTextLabel::get_selection_to);
 
@@ -5736,6 +5747,7 @@ void RichTextLabel::_bind_methods() {
 	ADD_GROUP("Text Selection", "");
 	ADD_PROPERTY(PropertyInfo(Variant::BOOL, "selection_enabled"), "set_selection_enabled", "is_selection_enabled");
 	ADD_PROPERTY(PropertyInfo(Variant::BOOL, "deselect_on_focus_loss_enabled"), "set_deselect_on_focus_loss_enabled", "is_deselect_on_focus_loss_enabled");
+	ADD_PROPERTY(PropertyInfo(Variant::BOOL, "drag_and_drop_selection_enabled"), "set_drag_and_drop_selection_enabled", "is_drag_and_drop_selection_enabled");
 
 	ADD_GROUP("Displayed Text", "");
 	// Note: "visible_characters" and "visible_ratio" should be set after "text" to be correctly applied.

scene/gui/rich_text_label.h

@@ -468,6 +468,7 @@ private:
 
 	Selection selection;
 	bool deselect_on_focus_loss_enabled = true;
+	bool drag_and_drop_selection_enabled = true;
 
 	bool context_menu_enabled = false;
 	bool shortcut_keys_enabled = true;
@@ -699,8 +700,13 @@ public:
 	String get_selected_text() const;
 	void select_all();
 	void selection_copy();
+
 	void set_deselect_on_focus_loss_enabled(const bool p_enabled);
 	bool is_deselect_on_focus_loss_enabled() const;
+
+	void set_drag_and_drop_selection_enabled(const bool p_enabled);
+	bool is_drag_and_drop_selection_enabled() const;
+
 	void deselect();
 
 	int get_pending_paragraphs() const;