protected override void OnCommit()
{
if (CanvasContext.ActiveLayer == null)
{
throw new InvalidOperationException();
}
if (_copiedDrawObjects.Count == 0)
{
return;
}
var commitedDrawObjects = _copiedDrawObjects.ToArray();
var layer = CanvasContext.ActiveLayer;
layer.AddDrawObjects(commitedDrawObjects);
//呈递事务;
var transaction = new StandardEditTransaction(
() => {
layer.RemoveDrawObjects(commitedDrawObjects);
},
() => {
layer.AddDrawObjects(commitedDrawObjects);
}
);
CommitTransaction(transaction);
}
public static void RemoveDrawObjects(this ICanvasDataContext canvasDataContext, ICollection <DrawObject> drawObjects)
{
if (drawObjects == null)
{
throw new ArgumentNullException(nameof(drawObjects));
}
if (drawObjects.Count == 0)
{
return;
}
//激发即将移除事件;
var removingArgs = new CanvasDrawObjectsRemovingEventArgs(drawObjects, canvasDataContext);
CommonEventHelper.Publish <CanvasDrawObjectsRemovingEvent, CanvasDrawObjectsRemovingEventArgs>(removingArgs);
CommonEventHelper.PublishEventToHandlers <ICanvasDrawObjectsRemovingEventHandler, CanvasDrawObjectsRemovingEventArgs>(removingArgs);
//若指示取消或集合为空,则不继续执行;
if (removingArgs.Cancel || removingArgs.RemovingDrawObjects.Count == 0)
{
return;
}
var removingGroups = removingArgs.RemovingDrawObjects.
GroupBy(p => p.Parent as CanvasLayer).Where(p => p.Key != null).ToArray();
void RemoveDrawObjects()
{
try {
foreach (var tuple in removingGroups)
{
tuple.Key.RemoveDrawObjects(tuple);
}
}
catch (Exception ex) {
LoggerService.WriteException(ex);
MsgBoxService.ShowError(ex.Message);
}
}
void AddDrawObjects()
{
try {
foreach (var tuple in removingGroups)
{
tuple.Key.AddDrawObjects(tuple);
}
}
catch (Exception ex) {
LoggerService.WriteException(ex);
MsgBoxService.ShowError(ex.Message);
}
}
RemoveDrawObjects();
var action = new StandardEditTransaction(AddDrawObjects, RemoveDrawObjects);
canvasDataContext.CommitTransaction(action);
}
protected override void OnCommit()
{
if (_createdDrawObjects.Count == 0 && _originReplacedDrawObjects.Count == 0)
{
return;
}
var activeLayer = CanvasContext.ActiveLayer;
if (activeLayer == null)
{
return;
}
//还原并移除被裁剪的绘制对象原件;
_originReplacedDrawObjects.ForEach(p => p.IsVisible = true);
activeLayer.RemoveDrawObjects(_originReplacedDrawObjects);
///应用裁剪后的绘制对象,即<see cref="_createdDrawObjects"/>,将其加入活跃图层中;
var copiedCreatedDrawObjects = _createdDrawObjects.ToArray();
var copiedOriginReplacedDrawObjects = _originReplacedDrawObjects.ToArray();
_createdDrawObjects.Clear();
_originReplacedDrawObjects.Clear();
activeLayer.AddDrawObjects(copiedCreatedDrawObjects);
var transaction = new StandardEditTransaction(
() => {
try {
activeLayer.RemoveDrawObjects(copiedCreatedDrawObjects);
activeLayer.AddDrawObjects(copiedOriginReplacedDrawObjects);
}
catch (Exception ex) {
RaiseErrorOccurred(ex);
//CommandOutputService.Current.WriteLine(ex.Message);
#if DEBUG
throw;
#endif
}
},
() => {
try {
activeLayer.AddDrawObjects(copiedCreatedDrawObjects);
activeLayer.RemoveDrawObjects(copiedOriginReplacedDrawObjects);
}
catch (Exception ex) {
RaiseErrorOccurred(ex);
//CommandOutputService.Current.WriteLine(ex.Message);
#if DEBUG
throw;
#endif
}
}
);
CommitTransaction(transaction);
}
public static void AddDrawObjects(this ICanvasDataContext canvasDataContext, ICollection <DrawObject> drawObjects)
{
if (drawObjects == null)
{
throw new ArgumentNullException(nameof(drawObjects));
}
if (drawObjects.Count == 0)
{
return;
}
var activeLayer = canvasDataContext.ActiveLayer;
if (activeLayer == null)
{
return;
//throw new InvalidOperationException(LanguageService.FindResourceString(Exception_ActiveLayerCannotBeNull));
}
void AddDrawObjects()
{
activeLayer.AddDrawObjects(drawObjects);
};
void RemoveDrawObjects()
{
activeLayer.RemoveDrawObjects(drawObjects);
}
AddDrawObjects();
var transaction = new StandardEditTransaction(RemoveDrawObjects, AddDrawObjects);
canvasDataContext.CommitTransaction(transaction);
}
/// <summary>
/// 呈递修改的默认实现,本方法将呈递撤销栈中的修改操作,并清空撤销/重做栈;
/// </summary>
/// <param name="canvasContext"></param>
protected override void OnCommit()
{
if (CanvasContext == null)
{
return;
}
//若撤销栈为空,则不进行呈递修改操作;
if (UndoDrawObjects.Count == 0)
{
return;
}
if (CanvasContext.ActiveLayer == null)
{
return;
}
var commitParams = new UniqueTypeEditToolCommitParams(new List <DrawObject>(UndoDrawObjects.ToArray()))
{
AppliedLayer = CanvasContext.ActiveLayer
};
OnCommitParams(commitParams);
if (commitParams.Cancel)
{
return;
}
if (commitParams.AppliedLayer == null)
{
return;
}
if (commitParams.AddedDrawObjects.Count == 0)
{
return;
}
//将撤销栈拷贝后呈递事务;
var addedDrawObjects = commitParams.AddedDrawObjects.ToArray();
var appliedLayer = commitParams.AppliedLayer;
appliedLayer.AddDrawObjects(addedDrawObjects);
var transAction = new StandardEditTransaction(
() => {
appliedLayer.RemoveDrawObjects(addedDrawObjects);
},
() => {
appliedLayer.AddDrawObjects(addedDrawObjects);
}
);
CommitTransaction(transAction);
//清除撤销/撤销栈;
UndoDrawObjects.Clear();
RedoDrawObjects.Clear();
}
