(svn r24307) -Codechange: Move all interaction of the dropdown window with widgets of the parent window to a method of the parent window.

src/widgets/dropdown.cpp

@@ -101,7 +101,7 @@ const WindowDesc _dropdown_desc(
 struct DropdownWindow : Window {
 	WindowClass parent_wnd_class; ///< Parent window class.
 	WindowNumber parent_wnd_num;  ///< Parent window number.
-	byte parent_button;           ///< Parent widget number where the window is dropped from.
+	int parent_button;            ///< Parent widget number where the window is dropped from.
 	DropDownList *list;           ///< List with dropdown menu items.
 	int selected_index;           ///< Index of the selected item in the list.
 	byte click_delay;             ///< Timer to delay selection.
@@ -168,21 +168,18 @@ struct DropdownWindow : Window {
 
 	~DropdownWindow()
 	{
+		/* Make the dropdown "invisible", so it doesn't affect new window placement.
+		 * Also mark it dirty in case the callback deals with the screen. (e.g. screenshots). */
+		this->window_class = WC_INVALID;
+		this->SetDirty();
+
 		Window *w2 = FindWindowById(this->parent_wnd_class, this->parent_wnd_num);
 		if (w2 != NULL) {
-			if (w2->nested_array != NULL) {
-				NWidgetCore *nwi2 = w2->GetWidget<NWidgetCore>(this->parent_button);
-				if ((nwi2->type & WWT_MASK) == NWID_BUTTON_DROPDOWN) {
-					nwi2->disp_flags &= ~ND_DROPDOWN_ACTIVE;
-				} else {
-					w2->RaiseWidget(this->parent_button);
-				}
-			} else {
-				w2->RaiseWidget(this->parent_button);
-			}
-			w2->SetWidgetDirty(this->parent_button);
+			Point pt = _cursor.pos;
+			pt.x -= w2->left;
+			pt.y -= w2->top;
+			w2->OnDropdownClose(pt, this->parent_button, this->selected_index, this->instant_close);
 		}
-
 		DeleteDropDownList(this->list);
 	}
 
@@ -305,19 +302,7 @@ struct DropdownWindow : Window {
 			if (!_left_button_clicked) {
 				this->drag_mode = false;
 				if (!this->GetDropDownItem(item)) {
-					if (this->instant_close) {
-						/* Make the dropdown "invisible", so it doesn't affect new window placement.
-						 * Also mark it dirty in case the callback deals with the screen. (e.g. screenshots). */
-						this->window_class = WC_INVALID;
-						this->SetDirty();
-
-						if (GetWidgetFromPos(w2, _cursor.pos.x - w2->left, _cursor.pos.y - w2->top) == this->parent_button) {
-							/* Send event for selected option if we're still
-							 * on the parent button of the list. */
-							w2->OnDropdownSelect(this->parent_button, this->selected_index);
-						}
-						delete this;
-					}
+					if (this->instant_close) delete this;
 					return;
 				}
 				this->click_delay = 2;

src/window.cpp

@@ -167,6 +167,39 @@ bool Window::IsWidgetHighlighted(byte widget_index) const
 	return nwid->IsHighlighted();
 }
 
+/**
+ * A dropdown window associated to this window has been closed.
+ * @param pt the point inside the window the mouse resides on after closure.
+ * @param widget the widget (button) that the dropdown is associated with.
+ * @param index the element in the dropdown that is selected.
+ * @param instant_close whether the dropdown was configured to close on mouse up.
+ */
+void Window::OnDropdownClose(Point pt, int widget, int index, bool instant_close)
+{
+	if (widget < 0) return;
+
+	if (instant_close) {
+		/* Send event for selected option if we're still
+		 * on the parent button of the dropdown (behaviour of the dropdowns in the main toolbar). */
+		if (GetWidgetFromPos(this, pt.x, pt.y) == widget) {
+			this->OnDropdownSelect(widget, index);
+		}
+	}
+
+	/* Raise the dropdown button */
+	if (this->nested_array != NULL) {
+		NWidgetCore *nwi2 = this->GetWidget<NWidgetCore>(widget);
+		if ((nwi2->type & WWT_MASK) == NWID_BUTTON_DROPDOWN) {
+			nwi2->disp_flags &= ~ND_DROPDOWN_ACTIVE;
+		} else {
+			this->RaiseWidget(widget);
+		}
+	} else {
+		this->RaiseWidget(widget);
+	}
+	this->SetWidgetDirty(widget);
+}
+
 /**
  * Return the Scrollbar to a widget index.
  * @param widnum Scrollbar widget index

src/window_gui.h

@@ -665,6 +665,8 @@ public:
 	 */
 	virtual void OnDropdownSelect(int widget, int index) {}
 
+	virtual void OnDropdownClose(Point pt, int widget, int index, bool instant_close);
+
 	/**
 	 * The query window opened from this window has closed.
 	 * @param str the new value of the string, NULL if the window