Fixed [#1469] by checking if there are grippers.

git-svn-id: http://svn.code.sf.net/p/greenshot/code/trunk@2516 7dccd23d-a4a3-4e1f-8c07-b4c1b4018ab4

Greenshot/Drawing/DrawableContainer.cs

@@ -323,6 +323,9 @@ namespace Greenshot.Drawing {
 		}
 		
 		protected virtual void DoLayout() {
+			if (grippers == null) {
+				return;
+			}
 			if (!layoutSuspended) {
 				int[] xChoords = new int[]{this.Left-2,this.Left+this.Width/2-2,this.Left+this.Width-2};
 				int[] yChoords = new int[]{this.Top-2,this.Top+this.Height/2-2,this.Top+this.Height-2};
@@ -471,19 +474,26 @@ namespace Greenshot.Drawing {
 		}
 		
 		public virtual void ShowGrippers() {
+			if (grippers != null) {
 				for (int i = 0; i < grippers.Length; i++) {
-				if(grippers[i].Enabled) grippers[i].Show();
-				else grippers[i].Hide();
+					if (grippers[i].Enabled) {
+						grippers[i].Show();
+					} else {
+						grippers[i].Hide();
+					}
+				}
 			}
 			this.ResumeLayout();
 		}
 		
 		public void HideGrippers() {
 			this.SuspendLayout();
+			if (grippers != null) {
 				for (int i = 0; i < grippers.Length; i++) {
 					grippers[i].Hide();
 				}
 			}
+		}
 		
 		public void ResizeTo(int width, int height, int anchorPosition) {
 			this.SuspendLayout();
@@ -554,7 +564,7 @@ namespace Greenshot.Drawing {
 		}
 		
 		private void SwitchParent(Surface newParent) {
-			if (parent != null) {
+			if (parent != null && grippers != null) {
 				for (int i=0; i<grippers.Length; i++) {
 					parent.Controls.Remove(grippers[i]);
 				}

Greenshot/Drawing/FreehandContainer.cs

@@ -58,11 +58,13 @@ namespace Greenshot.Drawing {
 		}
 		
 		protected void Init() {
+			if (grippers != null) {
 				for (int i = 0; i < grippers.Length; i++) {
 					grippers[i].Enabled = false;
 					grippers[i].Visible = false;
 				}
 			}
+		}
 		
 		[OnDeserializedAttribute()]
 		private void OnDeserialized(StreamingContext context) {

Greenshot/Drawing/LineContainer.cs

@@ -50,10 +50,12 @@ namespace Greenshot.Drawing {
 		}
 
 		protected void Init() {
+			if (grippers != null) {
 				foreach (int index in new int[] { 1, 2, 3, 5, 6, 7 }) {
 					grippers[index].Enabled = false;
 				}
 			}
+		}
 		
 		public override void Draw(Graphics graphics, RenderMode rm) {
 			graphics.SmoothingMode = SmoothingMode.HighQuality;