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ToolManager.cs
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ToolManager.cs
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//
// ToolManager.cs
//
// Author:
// Jonathan Pobst <monkey@jpobst.com>
//
// Copyright (c) 2010 Jonathan Pobst
//
// 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 Gtk;
namespace Pinta.Core
{
public class ToolManager : IEnumerable<BaseTool>
{
int index = -1;
int prev_index = -1;
private List<BaseTool> Tools;
public event EventHandler<ToolEventArgs> ToolAdded;
public event EventHandler<ToolEventArgs> ToolRemoved;
public ToolManager ()
{
Tools = new List<BaseTool> ();
}
public void AddTool (BaseTool tool)
{
tool.ToolItem.Clicked += HandlePbToolItemClicked;
tool.ToolItem.Sensitive = tool.Enabled;
Tools.Add (tool);
Tools.Sort (new ToolSorter ());
OnToolAdded (tool);
if (CurrentTool == null)
SetCurrentTool (tool);
}
public void RemoveInstanceOfTool (System.Type tool_type)
{
foreach (BaseTool tool in Tools) {
if (tool.GetType () == tool_type) {
tool.ToolItem.Clicked -= HandlePbToolItemClicked;
tool.ToolItem.Active = false;
tool.ToolItem.Sensitive = false;
Tools.Remove (tool);
Tools.Sort (new ToolSorter ());
SetCurrentTool (new DummyTool ());
OnToolRemoved (tool);
return;
}
}
}
void HandlePbToolItemClicked (object sender, EventArgs e)
{
ToggleToolButton tb = (ToggleToolButton)sender;
BaseTool t = FindTool (tb.Label);
// Don't let the user unselect the current tool
if (CurrentTool != null && t.Name == CurrentTool.Name) {
if (prev_index != index)
tb.Active = true;
return;
}
SetCurrentTool (t);
}
private BaseTool FindTool (string name)
{
name = name.ToLowerInvariant ();
foreach (BaseTool tool in Tools) {
if (tool.Name.ToLowerInvariant () == name) {
return tool;
}
}
return null;
}
public BaseTool CurrentTool {
get { if (index >= 0) {
return Tools[index];}
else {
DummyTool dummy = new DummyTool ();
SetCurrentTool (dummy);
return dummy;
}
}
}
public BaseTool PreviousTool {
get { return Tools[prev_index]; }
}
public void Commit ()
{
if (CurrentTool != null)
CurrentTool.DoCommit ();
}
public void SetCurrentTool (BaseTool tool)
{
int i = Tools.IndexOf (tool);
if (index == i)
return;
// Unload previous tool if needed
if (index >= 0) {
prev_index = index;
Tools[index].DoClearToolBar (PintaCore.Chrome.ToolToolBar);
Tools[index].DoDeactivated ();
Tools[index].ToolItem.Active = false;
}
// Load new tool
index = i;
tool.ToolItem.Active = true;
tool.DoActivated ();
tool.DoBuildToolBar (PintaCore.Chrome.ToolToolBar);
PintaCore.Workspace.Invalidate ();
PintaCore.Chrome.SetStatusBarText (string.Format (" {0}: {1}", tool.Name, tool.StatusBarText));
}
public bool SetCurrentTool (string tool)
{
BaseTool t = FindTool (tool);
if (t != null) {
SetCurrentTool (t);
return true;
}
return false;
}
public void SetCurrentTool (Gdk.Key shortcut)
{
BaseTool tool = FindNextTool (shortcut);
if (tool != null)
SetCurrentTool (tool);
}
private BaseTool FindNextTool (Gdk.Key shortcut)
{
string key = shortcut.ToString ().ToUpperInvariant ();
// Begin looking at the tool after the current one
for (int i = index + 1; i < Tools.Count; i++) {
if (Tools[i].ShortcutKey.ToString ().ToUpperInvariant () == key)
return Tools[i];
}
// Begin at the beginning and look up to the current tool
for (int i = 0; i < index; i++) {
if (Tools[i].ShortcutKey.ToString ().ToUpperInvariant () == key)
return Tools[i];
}
return null;
}
private void OnToolAdded (BaseTool tool)
{
if (ToolAdded != null)
ToolAdded (this, new ToolEventArgs (tool));
}
private void OnToolRemoved (BaseTool tool)
{
if (ToolRemoved != null)
ToolRemoved (this, new ToolEventArgs (tool));
}
#region IEnumerable<BaseTool> implementation
public IEnumerator<BaseTool> GetEnumerator ()
{
return Tools.GetEnumerator ();
}
#endregion
#region IEnumerable implementation
System.Collections.IEnumerator System.Collections.IEnumerable.GetEnumerator ()
{
return Tools.GetEnumerator ();
}
#endregion
class ToolSorter : Comparer<BaseTool>
{
public override int Compare (BaseTool x, BaseTool y)
{
return x.Priority - y.Priority;
}
}
}
//This tool does nothing, is used when no tools are in toolbox. If used seriously will probably
// throw a zillion exceptions due to missing overrides
public class DummyTool : BaseTool
{
public override string Name { get { return Mono.Unix.Catalog.GetString ("No tool selected."); } }
public override string Icon { get { return Gtk.Stock.MissingImage; } }
public override string StatusBarText { get { return Mono.Unix.Catalog.GetString ("No tool selected."); } }
protected override void OnBuildToolBar (Toolbar tb)
{
tool_label = null;
tool_image = null;
tool_sep = null;
}
}
}