tooltips on node links

src/dialogxml/dialogs/dialog.cpp

@@ -808,13 +808,23 @@ void cDialog::handle_one_event(const sf::Event& currentEvent, cFramerateLimiter&
 					redraw_everything();
 
 			bool inField = false;
+			bool onTooltip = false;
 			for(auto& ctrl : controls) {
+				if(!ctrl.second->tooltip_text.empty() && ctrl.second->getBounds().contains(x, y)){
+					if(tooltip_control.empty()){
+						LOG("Warning! Tooltip activated but nowhere to show it!");
+					}else{
+						getControl(tooltip_control).setText(ctrl.second->tooltip_text);
+						onTooltip = true;
+					}
+				}
 				if(ctrl.second->getType() == CTRL_FIELD && ctrl.second->getBounds().contains(x, y)) {
 					set_cursor(text_curs);
 					inField = true;
 					break;
 				}
 			}
+			if(!onTooltip && !tooltip_control.empty()) getControl(tooltip_control).setText("");
 			if(!inField) set_cursor(sword_curs);
 		}break;
 		default: // To silence warning of unhandled enum values

src/dialogxml/dialogs/dialog.hpp

@@ -107,6 +107,8 @@ public:
 	/// Create a new dialog with no items.
 	/// @param p Optionally, a parent dialog.
 	explicit cDialog(cDialog* p = nullptr);
+	/// Designate a control as the place to display tooltip text
+	void setTooltipControl(std::string key) { this->tooltip_control = key; }
 	/// Creates a new dialog, loading its definition from a file.
 	/// @param path The name of the file to load. It must be in the game's dialogs directory.
 	/// @param p Optionally, a parent dialog.
@@ -298,6 +300,8 @@ private:
 	std::string fname;
 	std::string defaultButton;
 	std::string escapeButton;
+	/// TODO make this specifiable in dialogxml
+	std::string tooltip_control;
 	sf::Clock animTimer, paintTimer;
 	friend class cControl;
 	friend class cContainer;

src/dialogxml/widgets/control.hpp

@@ -385,6 +385,9 @@ public:
 	/// If the control automatically determines its rect based on certain criteria, override this.
 	/// It will automatically be called during parsing.
 	virtual void recalcRect() {}
+
+	// Set text that will be displayed when the mouse hovers this
+	void setTooltipText(std::string text) { this->tooltip_text = text; }
 protected:
 	/// Create a new control attached to a dialog.
 	/// @param t The type of the control.
@@ -508,6 +511,8 @@ private:
 	std::string anchor;
 	bool is_link = false;
 	static std::mt19937 ui_rand;
+	// TODO make this specifiable in dialogXML
+	std::string tooltip_text;
 };
 
 #endif