Added a 'tree list' control, which will be used for the package/updates window...

Added a 'tree list' control, which will be used for the package/updates window to be able to group packages

src/gui/control/tree_list.hpp

+//+----------------------------------------------------------------------------+
+//| Description:  Magic Set Editor - Program to make Magic (tm) cards          |
+//| Copyright:    (C) 2001 - 2007 Twan van Laarhoven                           |
+//| License:      GNU General Public License 2 or later (see file COPYING)     |
+//+----------------------------------------------------------------------------+
+
+#ifndef HEADER_GUI_CONTROL_TREE_LIST
+#define HEADER_GUI_CONTROL_TREE_LIST
+
+// ----------------------------------------------------------------------------- : Includes
+
+#include <util/prec.hpp>
+#include <wx/vscroll.h>
+
+typedef intrusive_ptr<IntrusivePtrVirtualBase> VoidP;
+
+// ----------------------------------------------------------------------------- : TreeList
+
+/// A combination of a TreeCtrl and a ListCtrl. A tree with multiple columns.
+class TreeList : public wxPanel {
+  public:
+	TreeList(Window* parent, int id, long style = wxSUNKEN_BORDER);
+	
+	/// Expand/collapse an item
+	void expand(size_t item, bool expand = true);
+	/// Select an item
+	void select(size_t item);
+	
+	/// (re)build the list
+	void rebuild(bool full = true);
+	
+  public:
+	
+	/// An item in the tree list
+	struct Item {
+		Item() {}
+		Item(int level, bool expanded = false, VoidP data = VoidP())
+			: level(level), expanded(expanded), data(data)
+		{}
+		
+		int    level;
+		bool   expanded;
+		VoidP  data;
+		size_t position; // NOTHING if invisible, otherwise the line the item is on
+		UInt   lines;    // lines in front of this item (bit set)
+		inline bool visible() const { return position != NOTHING; }
+	};
+	
+  protected:
+	
+	/// The items in the tree list
+	vector<Item> items;
+	
+	static const size_t NOTHING = (size_t)-1;
+	size_t selection;
+	
+	/// Initialize the items
+	virtual void initItems() = 0;
+	
+	/// Get the text of an item
+	virtual String itemText(size_t item, size_t column) const = 0;
+	/// Get the color of an item
+	virtual Color  itemColor(size_t item, size_t column) const = 0;
+	
+	/// The number of columns
+	virtual size_t columnCount() const = 0;
+	/// The text of a column
+	virtual String columnText(size_t column) const = 0;
+	/// The width of a column in pixels
+	virtual int    columnWidth(size_t column) const = 0;
+	
+  private:
+	int    item_height;
+	static const int header_height = 17;
+	static const int level_width   = 17;
+	
+	size_t total_lines;     // number of shown items
+	size_t first_line;      // first visible line
+	size_t visible_lines;   // number of (partially) visible lines
+	size_t visible_lines_t; // number of totally visible lines
+	
+	void calcItemCount();
+	size_t findItemByPos(int y) const;
+	size_t findItem(size_t line, size_t start = 0) const;
+	size_t findLastItem(size_t end) const;
+	size_t findParent(size_t item) const;
+	bool hasChildren(size_t item) const;
+	
+	DECLARE_EVENT_TABLE();
+	
+	void onPaint(wxPaintEvent&);
+	void onChar(wxKeyEvent& ev);
+	void onLeftDown(wxMouseEvent& ev);
+	void onLeftDClick(wxMouseEvent& ev);
+	
+	// VScrolledWindow clone
+	
+	void onSize(wxSizeEvent& ev);
+	void onScroll(wxScrollWinEvent& ev);
+	void onMouseWheel(wxMouseEvent& ev);
+	void ScrollToLine(size_t line);
+	void UpdateScrollbar();
+	void RefreshLine(size_t line);
+};
+
+// ----------------------------------------------------------------------------- : EOF
+#endif