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//
// ListBoxBackend.cs
//
// Author:
// Lluis Sanchez <lluis@xamarin.com>
//
// Copyright (c) 2013 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 AppKit;
using Xwt.Backends;
namespace Xwt.Mac
{
public class ListBoxBackend: ListViewBackend, IListBoxBackend
{
ListViewColumn column = new ListViewColumn ();
NSTableColumn columnHandle;
public ListBoxBackend ()
{
}
public new bool GridLinesVisible {
get {
return (base.GridLinesVisible == Xwt.GridLines.Horizontal || base.GridLinesVisible == Xwt.GridLines.Both);
}
set {
base.GridLinesVisible = value ? Xwt.GridLines.Horizontal : Xwt.GridLines.None;
}
}
public override void Initialize ()
{
base.Initialize ();
HeadersVisible = false;
columnHandle = AddColumn (column);
VerticalScrollPolicy = ScrollPolicy.Automatic;
HorizontalScrollPolicy = ScrollPolicy.Automatic;
}
public void SetViews (CellViewCollection views)
{
column.Views.Clear ();
foreach (var v in views)
column.Views.Add (v);
UpdateColumn (column, columnHandle, ListViewColumnChange.Cells);
}
public override void SetSource (IListDataSource source, IBackend sourceBackend)
{
base.SetSource (source, sourceBackend);
source.RowInserted += HandleColumnSizeChanged;
source.RowDeleted += HandleColumnSizeChanged;
source.RowChanged += HandleColumnSizeChanged;
ResetColumnSize (source);
}
void HandleColumnSizeChanged (object sender, ListRowEventArgs e)
{
var source = (IListDataSource)sender;
ResetColumnSize (source);
}
void ResetColumnSize (IListDataSource source)
{
// Calculate size of column
// This is how Apple implements it; unfortunately, they don't expose this functionality in the API.
// https://developer.apple.com/library/mac/documentation/Cocoa/Reference/NSTableViewDelegate_Protocol/index.html#//apple_ref/occ/intfm/NSTableViewDelegate/tableView:sizeToFitWidthOfColumn:
nfloat w = 0;
for (var row = 0; row < source.RowCount; row++) {
using (var cell = Table.GetCell (0, row)) {
var size = cell.CellSize;
w = (nfloat)Math.Max (w, size.Width);
}
}
columnHandle.MinWidth = (nfloat)Math.Ceiling (w);
columnHandle.Width = (nfloat)Math.Ceiling (w);
}
}
}
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