diff dynamin/gui/list_box.d @ 0:aa4efef0f0b1

Initial commit of code.
author Jordan Miner <jminer7@gmail.com>
date Mon, 15 Jun 2009 22:10:48 -0500
parents
children b621b528823d
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--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dynamin/gui/list_box.d	Mon Jun 15 22:10:48 2009 -0500
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+// Written in the D programming language
+// www.digitalmars.com/d/
+
+/*
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is the Dynamin library.
+ *
+ * The Initial Developer of the Original Code is Jordan Miner.
+ * Portions created by the Initial Developer are Copyright (C) 2007-2009
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *   Jordan Miner <jminer7@gmail.com>
+ *
+ */
+
+module dynamin.gui.list_box;
+
+import dynamin.all_painting;
+import dynamin.all_core;
+import dynamin.all_gui;
+
+/**
+ * A control that shows a list of items that can be selected.
+ *
+ * The appearance of a list box with Windows Classic:
+ *
+ * $(IMAGE ../web/example_list_box.png)
+ */
+class ListBox : Scrollable {
+protected:
+	List!(string) _items;
+	int _selectedIndex = -1;
+
+	override void whenKeyDown(KeyEventArgs e) {
+			if(e.key == Key.Down) {
+				if(selectedIndex + 1 < _items.count)
+					selectedIndex = selectedIndex + 1;
+			} else if(e.key == Key.Up) {
+				if(selectedIndex - 1 >= 0)
+					selectedIndex = selectedIndex - 1;
+			}
+		}
+	override Size bestSize() {
+		return Size(0, 13*_items.count);
+	}
+	override void whenContentPainting(PaintingEventArgs e) {
+		with(e.graphics) {
+			source = backColor;
+			paint();
+			auto clip = getClipExtents();
+			int start = cast(int)clip.y/13, end = cast(int)clip.bottom/13+1;
+			for(int i = start; i < _items.count && i < end; ++i) {
+				source = Color.Black;
+				if(i == _selectedIndex) {
+					// TODO: hack
+					//Source = WindowsTheme.getColor(dynamin.c.windows.COLOR_HIGHLIGHT);
+					rectangle(0, i*13, width, 13);
+					fill();
+					//Source = WindowsTheme.getColor(dynamin.c.windows.COLOR_HIGHLIGHTTEXT);
+				}
+				drawText(_items[i], 3, i*13);
+			}
+		}
+	}
+	override void whenContentMouseDown(MouseEventArgs e) {
+		focus();
+		selectedIndex = cast(int)e.y/13;
+	}
+public:
+
+	/// This event occurs after the selection has changed.
+	Event!() selectionChanged;
+	/// Override this method in a subclass to handle the SelectionChanged event.
+	protected void whenSelectionChanged(EventArgs e) { }
+
+	void listItemsChanged() {
+		super.layout();
+		repaint();
+	}
+
+	///
+	this() {
+		selectionChanged = new Event!()(&whenSelectionChanged);
+		_items = new List!(string)(&listItemsChanged);
+
+		super();
+		_focusable = true;
+		// TODO: hack
+		backColor = WindowsTheme.getColor(5);
+	}
+	///
+	List!(string) items() {
+		return _items;
+	}
+	///
+	int selectedIndex() { return _selectedIndex; }
+	/// ditto
+	void selectedIndex(int i) {
+		if(i == _selectedIndex)
+			return;
+		_selectedIndex = i;
+		repaint();
+		selectionChanged(new EventArgs);
+	}
+}
+