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//
// TreeViews.cs
//
// Author:
// Lluis Sanchez <lluis@xamarin.com>
//
// Copyright (c) 2012 Xamarin Inc
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
using System;
using Xwt;
namespace Samples
{
public class TreeViews: VBox
{
DataField<CheckBoxState> triState = new DataField<CheckBoxState>();
DataField<bool> check = new DataField<bool>();
DataField<bool> option1 = new DataField<bool> ();
DataField<bool> option2 = new DataField<bool> ();
DataField<bool> option3 = new DataField<bool> ();
DataField<string> text = new DataField<string> ();
DataField<string> desc = new DataField<string> ();
public TreeViews ()
{
TreeView view = new TreeView ();
TreeStore store = new TreeStore (triState, check, option1, option2, option3, text, desc);
view.GridLinesVisible = GridLines.Both;
var triStateCellView = new CheckBoxCellView (triState) { Editable = true, AllowMixed = true };
triStateCellView.Toggled += (object sender, WidgetEventArgs e) => {
if (view.CurrentEventRow == null) {
MessageDialog.ShowError("CurrentEventRow is null. This is not supposed to happen");
}
else {
store.GetNavigatorAt(view.CurrentEventRow).SetValue(text, "TriState Toggled");
}
};
var checkCellView = new CheckBoxCellView (check) { Editable = true };
checkCellView.Toggled += (object sender, WidgetEventArgs e) => {
if (view.CurrentEventRow == null) {
MessageDialog.ShowError("CurrentEventRow is null. This is not supposed to happen");
}
else {
store.GetNavigatorAt(view.CurrentEventRow).SetValue(text, "Toggled " + checkCellView.Active);
}
};
var optionCellView1 = new RadioButtonCellView (option1) { Editable = true };
optionCellView1.Toggled += (object sender, WidgetEventArgs e) => {
if (view.CurrentEventRow == null) {
MessageDialog.ShowError ("CurrentEventRow is null. This is not supposed to happen");
} else {
store.GetNavigatorAt (view.CurrentEventRow).SetValue (option2, optionCellView1.Active);
}
};
var optionCellView2 = new RadioButtonCellView (option2) { Editable = true };
optionCellView2.Toggled += (object sender, WidgetEventArgs e) => {
if (view.CurrentEventRow == null) {
MessageDialog.ShowError ("CurrentEventRow is null. This is not supposed to happen");
} else {
store.GetNavigatorAt (view.CurrentEventRow).SetValue (option1, optionCellView2.Active);
}
};
TreePosition initialActive = null;
var optionCellView3 = new RadioButtonCellView (option3) { Editable = true };
optionCellView3.Toggled += (object sender, WidgetEventArgs e) => {
if (view.CurrentEventRow == null) {
MessageDialog.ShowError ("CurrentEventRow is null. This is not supposed to happen");
} else {
if (initialActive != null)
store.GetNavigatorAt (initialActive).SetValue (option3, false);
initialActive = view.CurrentEventRow;
}
};
view.Columns.Add ("TriCheck", triStateCellView);
view.Columns.Add ("Check", checkCellView);
view.Columns.Add ("Radio", optionCellView1, optionCellView2, optionCellView3);
view.Columns.Add ("Item", text);
view.Columns.Add ("Desc", desc);
view.Columns[2].Expands = true; // expand third column, aligning last column to the right side
view.Columns[2].CanResize = true;
view.Columns[3].CanResize = true;
store.AddNode ().SetValue (text, "One").SetValue (desc, "First").SetValue (triState, CheckBoxState.Mixed);
store.AddNode ().SetValue (text, "Two").SetValue (desc, "Second").AddChild ()
.SetValue (text, "Sub two").SetValue (desc, "Sub second");
store.AddNode ().SetValue (text, "Three").SetValue (desc, "Third").AddChild ()
.SetValue (text, "Sub three").SetValue (desc, "Sub third");
PackStart (view, true);
Menu contextMenu = new Menu ();
contextMenu.Items.Add (new MenuItem ("Test menu"));
view.ButtonPressed += delegate(object sender, ButtonEventArgs e) {
TreePosition tmpTreePos;
RowDropPosition tmpRowDrop;
if ((e.Button == PointerButton.Right) && view.GetDropTargetRow (e.X, e.Y, out tmpRowDrop, out tmpTreePos)) {
// Set actual row to selected
view.SelectRow (tmpTreePos);
contextMenu.Popup(view, e.X, e.Y);
}
};
view.DataSource = store;
Label la = new Label ();
PackStart (la);
view.SetDragDropTarget (DragDropAction.All, TransferDataType.Text);
view.SetDragSource (DragDropAction.All, TransferDataType.Text);
view.DragDrop += delegate(object sender, DragEventArgs e) {
TreePosition node;
RowDropPosition pos;
view.GetDropTargetRow (e.Position.X, e.Position.Y, out pos, out node);
var nav = store.GetNavigatorAt (node);
la.Text += "Dropped \"" + e.Data.Text + "\" into \"" + nav.GetValue (text) + "\" " + pos + "\n";
e.Success = true;
};
view.DragOver += delegate(object sender, DragOverEventArgs e) {
TreePosition node;
RowDropPosition pos;
view.GetDropTargetRow (e.Position.X, e.Position.Y, out pos, out node);
if (pos == RowDropPosition.Into)
e.AllowedAction = DragDropAction.None;
else
e.AllowedAction = e.Action;
};
view.DragStarted += delegate(object sender, DragStartedEventArgs e) {
var val = store.GetNavigatorAt (view.SelectedRow).GetValue (text);
e.DragOperation.Data.AddValue (val);
e.DragOperation.Finished += delegate(object s, DragFinishedEventArgs args) {
Console.WriteLine ("D:" + args.DeleteSource);
};
};
view.RowExpanding += delegate(object sender, TreeViewRowEventArgs e) {
var val = store.GetNavigatorAt (e.Position).GetValue (text);
Console.WriteLine("Expanding: " + val);
};
view.RowExpanded += delegate(object sender, TreeViewRowEventArgs e) {
var val = store.GetNavigatorAt (e.Position).GetValue (text);
Console.WriteLine("Expanded: " + val);
};
view.RowCollapsing += delegate(object sender, TreeViewRowEventArgs e) {
var val = store.GetNavigatorAt (e.Position).GetValue (text);
Console.WriteLine("Collapsing: " + val);
};
view.RowCollapsed += delegate(object sender, TreeViewRowEventArgs e) {
var val = store.GetNavigatorAt (e.Position).GetValue (text);
Console.WriteLine("Collapsed: " + val);
};
int addCounter = 0;
view.KeyPressed += (sender, e) => {
if (e.Key == Key.Insert) {
TreeNavigator n;
if (view.SelectedRow != null)
n = store.InsertNodeAfter (view.SelectedRow).SetValue (text, "Inserted").SetValue (desc, "Desc");
else
n = store.AddNode ().SetValue (text, "Inserted").SetValue (desc, "Desc");
view.ExpandToRow (n.CurrentPosition);
view.ScrollToRow (n.CurrentPosition);
view.UnselectAll ();
view.SelectRow (n.CurrentPosition);
view.FocusedRow = n.CurrentPosition;
}
};
Button addButton = new Button ("Add");
addButton.Clicked += delegate(object sender, EventArgs e) {
addCounter++;
TreeNavigator n;
if (view.SelectedRow != null)
n = store.AddNode (view.SelectedRow).SetValue (text, "Added " + addCounter).SetValue (desc, "Desc");
else
n = store.AddNode ().SetValue (text, "Added " + addCounter).SetValue (desc, "Desc");
view.ExpandToRow (n.CurrentPosition);
view.ScrollToRow (n.CurrentPosition);
view.SelectRow (n.CurrentPosition);
};
PackStart (addButton);
Button removeButton = new Button ("Remove Selection");
removeButton.Clicked += delegate(object sender, EventArgs e) {
foreach (TreePosition row in view.SelectedRows) {
store.GetNavigatorAt (row).Remove ();
}
};
PackStart (removeButton);
var label = new Label ();
PackStart (label);
view.RowExpanded += (sender, e) => label.Text = "Row expanded: " + store.GetNavigatorAt (e.Position).GetValue (text);
}
void HandleDragOver (object sender, DragOverEventArgs e)
{
e.AllowedAction = e.Action;
}
}
}
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