1 files changed, 65 insertions, 0 deletions
diff --git a/src/widgets/dropdown_type.h b/src/widgets/dropdown_type.h
new file mode 100644
index 000000000..650edc5b1
--- /dev/null
+++ b/src/widgets/dropdown_type.h
@@ -0,0 +1,65 @@
+/* $Id$ */
+
+#ifndef WIDGETS_DROPDOWN_TYPE_H
+#define WIDGETS_DROPDOWN_TYPE_H
+
+#include "../window_type.h"
+#include <list>
+
+/**
+ * Base list item class from which others are derived. If placed in a list it
+ * will appear as a horizontal line in the menu.
+ */
+class DropDownListItem {
+public:
+	int result;  ///< Result code to return to window on selection
+	bool masked; ///< Masked and unselectable item
+
+	virtual StringID String() const;
+};
+
+/**
+ * Common string list item.
+ */
+class DropDownListStringItem : public DropDownListItem {
+public:
+	StringID string; ///< String ID of item
+
+	DropDownListStringItem(StringID string, uint result, bool masked)
+	{
+		this->string = string;
+		this->result = result;
+		this->masked = masked;
+	}
+
+	StringID String() const;
+};
+
+/**
+ * String list item with parameters.
+ */
+class DropDownListParamStringItem : public DropDownListStringItem {
+public:
+	uint64 decode_params[10]; ///< Parameters of the string
+
+	StringID String() const;
+	void SetParam(uint index, uint64 value) { decode_params[index] = value; }
+};
+
+/**
+ * A drop down list is a collection of drop down list items.
+ */
+typedef std::list<DropDownListItem *> DropDownList;
+
+/**
+ * Show a drop down list.
+ * @param w        Parent window for the list.
+ * @param list     Prepopulated DropDownList. Will be deleted when the list is
+ *                 closed.
+ * @param selected The initially selected list item.
+ * @param button   The widget within the parent window that is used to determine
+ *                 the list's location.
+ */
+void ShowDropDownList(Window *w, DropDownList *list, int selected, int button);
+
+#endif /* WIDGETS_DROPDOWN_TYPE_H */