OpenHardwareMonitor-retired: External/Aga.Controls/Tree/Input/NormalInputState.cs@0c551e8818e0 (annotated)

moel@345	1	using System;
moel@345	2	using System.Collections.Generic;
moel@345	3	using System.Text;
moel@345	4	using System.Windows.Forms;
moel@345	5
moel@345	6	namespace Aga.Controls.Tree
moel@345	7	{
moel@345	8	internal class NormalInputState : InputState
moel@345	9	{
moel@345	10	private bool _mouseDownFlag = false;
moel@345	11
moel@345	12	public NormalInputState(TreeViewAdv tree) : base(tree)
moel@345	13	{
moel@345	14	}
moel@345	15
moel@345	16	public override void KeyDown(KeyEventArgs args)
moel@345	17	{
moel@345	18	if (Tree.CurrentNode == null && Tree.Root.Nodes.Count > 0)
moel@345	19	Tree.CurrentNode = Tree.Root.Nodes[0];
moel@345	20
moel@345	21	if (Tree.CurrentNode != null)
moel@345	22	{
moel@345	23	switch (args.KeyCode)
moel@345	24	{
moel@345	25	case Keys.Right:
moel@345	26	if (!Tree.CurrentNode.IsExpanded)
moel@345	27	Tree.CurrentNode.IsExpanded = true;
moel@345	28	else if (Tree.CurrentNode.Nodes.Count > 0)
moel@345	29	Tree.SelectedNode = Tree.CurrentNode.Nodes[0];
moel@345	30	args.Handled = true;
moel@345	31	break;
moel@345	32	case Keys.Left:
moel@345	33	if (Tree.CurrentNode.IsExpanded)
moel@345	34	Tree.CurrentNode.IsExpanded = false;
moel@345	35	else if (Tree.CurrentNode.Parent != Tree.Root)
moel@345	36	Tree.SelectedNode = Tree.CurrentNode.Parent;
moel@345	37	args.Handled = true;
moel@345	38	break;
moel@345	39	case Keys.Down:
moel@345	40	NavigateForward(1);
moel@345	41	args.Handled = true;
moel@345	42	break;
moel@345	43	case Keys.Up:
moel@345	44	NavigateBackward(1);
moel@345	45	args.Handled = true;
moel@345	46	break;
moel@345	47	case Keys.PageDown:
moel@345	48	NavigateForward(Math.Max(1, Tree.CurrentPageSize - 1));
moel@345	49	args.Handled = true;
moel@345	50	break;
moel@345	51	case Keys.PageUp:
moel@345	52	NavigateBackward(Math.Max(1, Tree.CurrentPageSize - 1));
moel@345	53	args.Handled = true;
moel@345	54	break;
moel@345	55	case Keys.Home:
moel@345	56	if (Tree.RowMap.Count > 0)
moel@345	57	FocusRow(Tree.RowMap[0]);
moel@345	58	args.Handled = true;
moel@345	59	break;
moel@345	60	case Keys.End:
moel@345	61	if (Tree.RowMap.Count > 0)
moel@345	62	FocusRow(Tree.RowMap[Tree.RowMap.Count-1]);
moel@345	63	args.Handled = true;
moel@345	64	break;
moel@345	65	case Keys.Subtract:
moel@345	66	Tree.CurrentNode.Collapse();
moel@345	67	args.Handled = true;
moel@345	68	args.SuppressKeyPress = true;
moel@345	69	break;
moel@345	70	case Keys.Add:
moel@345	71	Tree.CurrentNode.Expand();
moel@345	72	args.Handled = true;
moel@345	73	args.SuppressKeyPress = true;
moel@345	74	break;
moel@345	75	case Keys.Multiply:
moel@345	76	Tree.CurrentNode.ExpandAll();
moel@345	77	args.Handled = true;
moel@345	78	args.SuppressKeyPress = true;
moel@345	79	break;
moel@345	80	case Keys.A:
moel@345	81	if (args.Modifiers == Keys.Control)
moel@345	82	Tree.SelectAllNodes();
moel@345	83	break;
moel@345	84	}
moel@345	85	}
moel@345	86	}
moel@345	87
moel@345	88	public override void MouseDown(TreeNodeAdvMouseEventArgs args)
moel@345	89	{
moel@345	90	if (args.Node != null)
moel@345	91	{
moel@345	92	Tree.ItemDragMode = true;
moel@345	93	Tree.ItemDragStart = args.Location;
moel@345	94
moel@345	95	if (args.Button == MouseButtons.Left \|\| args.Button == MouseButtons.Right)
moel@345	96	{
moel@345	97	Tree.BeginUpdate();
moel@345	98	try
moel@345	99	{
moel@345	100	Tree.CurrentNode = args.Node;
moel@345	101	if (args.Node.IsSelected)
moel@345	102	_mouseDownFlag = true;
moel@345	103	else
moel@345	104	{
moel@345	105	_mouseDownFlag = false;
moel@345	106	DoMouseOperation(args);
moel@345	107	}
moel@345	108	}
moel@345	109	finally
moel@345	110	{
moel@345	111	Tree.EndUpdate();
moel@345	112	}
moel@345	113	}
moel@345	114
moel@345	115	}
moel@345	116	else
moel@345	117	{
moel@345	118	Tree.ItemDragMode = false;
moel@345	119	MouseDownAtEmptySpace(args);
moel@345	120	}
moel@345	121	}
moel@345	122
moel@345	123	public override void MouseUp(TreeNodeAdvMouseEventArgs args)
moel@345	124	{
moel@345	125	Tree.ItemDragMode = false;
moel@345	126	if (_mouseDownFlag && args.Node != null)
moel@345	127	{
moel@345	128	if (args.Button == MouseButtons.Left)
moel@345	129	DoMouseOperation(args);
moel@345	130	else if (args.Button == MouseButtons.Right)
moel@345	131	Tree.CurrentNode = args.Node;
moel@345	132	}
moel@345	133	_mouseDownFlag = false;
moel@345	134	}
moel@345	135
moel@345	136
moel@345	137	private void NavigateBackward(int n)
moel@345	138	{
moel@345	139	int row = Math.Max(Tree.CurrentNode.Row - n, 0);
moel@345	140	if (row != Tree.CurrentNode.Row)
moel@345	141	FocusRow(Tree.RowMap[row]);
moel@345	142	}
moel@345	143
moel@345	144	private void NavigateForward(int n)
moel@345	145	{
moel@345	146	int row = Math.Min(Tree.CurrentNode.Row + n, Tree.RowCount - 1);
moel@345	147	if (row != Tree.CurrentNode.Row)
moel@345	148	FocusRow(Tree.RowMap[row]);
moel@345	149	}
moel@345	150
moel@345	151	protected virtual void MouseDownAtEmptySpace(TreeNodeAdvMouseEventArgs args)
moel@345	152	{
moel@345	153	Tree.ClearSelection();
moel@345	154	}
moel@345	155
moel@345	156	protected virtual void FocusRow(TreeNodeAdv node)
moel@345	157	{
moel@345	158	Tree.SuspendSelectionEvent = true;
moel@345	159	try
moel@345	160	{
moel@345	161	Tree.ClearSelectionInternal();
moel@345	162	Tree.CurrentNode = node;
moel@345	163	Tree.SelectionStart = node;
moel@345	164	node.IsSelected = true;
moel@345	165	Tree.ScrollTo(node);
moel@345	166	}
moel@345	167	finally
moel@345	168	{
moel@345	169	Tree.SuspendSelectionEvent = false;
moel@345	170	}
moel@345	171	}
moel@345	172
moel@345	173	protected bool CanSelect(TreeNodeAdv node)
moel@345	174	{
moel@345	175	if (Tree.SelectionMode == TreeSelectionMode.MultiSameParent)
moel@345	176	{
moel@345	177	return (Tree.SelectionStart == null \|\| node.Parent == Tree.SelectionStart.Parent);
moel@345	178	}
moel@345	179	else
moel@345	180	return true;
moel@345	181	}
moel@345	182
moel@345	183	protected virtual void DoMouseOperation(TreeNodeAdvMouseEventArgs args)
moel@345	184	{
moel@345	185	if (Tree.SelectedNodes.Count == 1 && args.Node != null && args.Node.IsSelected)
moel@345	186	return;
moel@345	187
moel@345	188	Tree.SuspendSelectionEvent = true;
moel@345	189	try
moel@345	190	{
moel@345	191	Tree.ClearSelectionInternal();
moel@345	192	if (args.Node != null)
moel@345	193	args.Node.IsSelected = true;
moel@345	194	Tree.SelectionStart = args.Node;
moel@345	195	}
moel@345	196	finally
moel@345	197	{
moel@345	198	Tree.SuspendSelectionEvent = false;
moel@345	199	}
moel@345	200	}
moel@345	201	}
moel@345	202	}

author	moel.mich
	Sun, 27 May 2012 15:16:19 +0000
changeset 345	0c551e8818e0
permissions	-rw-r--r--