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//
// DialogBackend.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 System.Collections.Generic;
using System.Linq;
using AppKit;
using CoreGraphics;
using Foundation;
using ObjCRuntime;
using Xwt.Backends;
using Xwt.Drawing;
namespace Xwt.Mac
{
public class DialogBackend: WindowBackend, IDialogBackend
{
HBox buttonBox;
NSView buttonBoxView;
Dictionary<DialogButton,Button> buttons = new Dictionary<DialogButton, Button> ();
DialogButton defaultButton;
WidgetSpacing buttonBoxPadding = new WidgetSpacing (12, 6, 12, 12);
bool modalSessionRunning;
public DialogButton DefaultButton {
get {
return defaultButton;
}
set {
defaultButton = value;
SetButtons (buttons.Keys.ToArray ());
}
}
public DialogBackend (NativeHandle ptr) : base (ptr)
{
}
public DialogBackend ()
{
}
public override void InitializeBackend (object frontend, ApplicationContext context)
{
base.InitializeBackend (frontend, context);
buttonBox = new HBox () {
Spacing = 0,
Margin = 0
};
buttonBoxView = ((ViewBackend)buttonBox.GetBackend ()).Widget;
ContentView.AddSubview (buttonBoxView);
}
[Export ("cancelOperation:")]
void HandleCancelOperation (NSObject semder)
{
PerformClose (this);
//FIXME: should we check whether there is a Command.Cancel button and
// respond with the command instead of a simple close (null response)?
}
protected override void OnClosed ()
{
base.OnClosed ();
if (modalSessionRunning)
EndLoop ();
}
public override void LayoutWindow ()
{
var frame = ContentView.Frame;
var boxHeight = 0f;
if (buttonBox.Children.Any ()) {
var ps = buttonBox.Surface.GetPreferredSize (true);
buttonBoxView.Frame = new CGRect ((nfloat)buttonBoxPadding.Left, (nfloat)buttonBoxPadding.Bottom, frame.Width - (nfloat)buttonBoxPadding.HorizontalSpacing, (float)ps.Height);
buttonBox.Surface.Reallocate ();
boxHeight = (float)ps.Height + (float)buttonBoxPadding.VerticalSpacing;
}
LayoutContent (new CGRect (0, boxHeight, frame.Width, frame.Height - boxHeight));
}
public override void GetMetrics (out Size minSize, out Size decorationSize)
{
var ps = buttonBox.Surface.GetPreferredSize (true);
minSize = new Size (ps.Width + buttonBoxPadding.VerticalSpacing, 0);
decorationSize = new Size (0, ps.Height + buttonBoxPadding.HorizontalSpacing);
}
#region IDialogBackend implementation
public void SetButtons (System.Collections.Generic.IEnumerable<DialogButton> buttonList)
{
buttonBox.Clear ();
foreach (var b in buttonList.OrderBy (b => b == DefaultButton).Reverse ()) {
var button = new Button { Font = Font.SystemFont };
var tb = b;
button.Clicked += delegate {
OnClicked (tb);
};
button.MinWidth = 77; // Dialog buttons have a minimal width of 77px on Mac
if (b.PackOrigin == PackOrigin.End)
buttonBox.PackEnd (button);
else
buttonBox.PackStart (button);
buttons [b] = button;
UpdateButton (b, button);
}
}
void OnClicked (DialogButton button)
{
ApplicationContext.InvokeUserCode (delegate {
((IDialogEventSink)EventSink).OnDialogButtonClicked (button);
});
}
public void UpdateButton (DialogButton b)
{
Button realButton;
if (buttons.TryGetValue (b, out realButton)) {
UpdateButton (b, realButton);
}
}
public void UpdateButton (DialogButton b, Button realButton)
{
realButton.Label = b.Label;
realButton.Image = b.Image;
realButton.Sensitive = b.Sensitive;
realButton.Visible = b.Visible;
// Dialog buttons on Mac have a 8px horizontal padding
realButton.WidthRequest = -1;
var s = realButton.Surface.GetPreferredSize ();
realButton.WidthRequest = s.Width + 16;
if (b == defaultButton) {
var nativeButton = realButton.Surface.NativeWidget as NSButton;
nativeButton.Window.DefaultButtonCell = nativeButton.Cell;
}
}
public void RunLoop (IWindowFrameBackend parent)
{
NSWindow nsParent = parent?.Window as NSWindow;
if (nsParent == null)
{
//a modal dialog needs parent window so we try take the current key
nsParent = NSApplication.SharedApplication.ModalWindow ?? NSApplication.SharedApplication.KeyWindow;
}
if (nsParent != null && nsParent.IsVisible)
{
nsParent.AddChildWindow(this, NSWindowOrderingMode.Above);
}
Visible = true;
modalSessionRunning = true;
Util.CenterWindow(this, nsParent);
NSApplication.SharedApplication.RunModalForWindow (this);
}
public void EndLoop ()
{
modalSessionRunning = false;
var parent = ParentWindow;
if (parent != null)
parent.RemoveChildWindow (this);
OrderOut (this);
Close();
NSApplication.SharedApplication.StopModal ();
if (parent != null) {
parent.MakeKeyAndOrderFront (parent);
if (parent.AccessibilityFocusedWindow != parent) {
parent.AccessibilityFocusedWindow = parent;
}
}
}
#endregion
}
}
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