BrightIdeasSoftware.ObjectListView.InitializeStateImageList C# (CSharp) Method

        protected virtual void InitializeStateImageList()
        {
            if (this.DesignMode)
                return;

            if (this.StateImageList == null) {
                this.StateImageList = new ImageList();
                this.StateImageList.ImageSize = new Size(16, 16);
                this.StateImageList.ColorDepth = ColorDepth.Depth32Bit;
            }

            if (this.RowHeight != -1 &&
                this.View == View.Details &&
                this.StateImageList.ImageSize.Height != this.RowHeight) {
                this.StateImageList = new ImageList();
                this.StateImageList.ImageSize = new Size(16, this.RowHeight);
                this.StateImageList.ColorDepth = ColorDepth.Depth32Bit;
            }

            if (!this.CheckBoxes)
                return;

            // The internal logic of ListView cycles through the state images when the primary
            // checkbox is clicked. So we have to get exactly the right number of images in the
            // image list.
            if (this.StateImageList.Images.Count == 0)
                this.AddCheckStateBitmap(this.StateImageList, UNCHECKED_KEY, CheckBoxState.UncheckedNormal);
            if (this.StateImageList.Images.Count <= 1)
                this.AddCheckStateBitmap(this.StateImageList, CHECKED_KEY, CheckBoxState.CheckedNormal);
            if (this.TriStateCheckBoxes && this.StateImageList.Images.Count <= 2)
                this.AddCheckStateBitmap(this.StateImageList, INDETERMINATE_KEY, CheckBoxState.MixedNormal);
            else {
                if (this.StateImageList.Images.ContainsKey(INDETERMINATE_KEY))
                    this.StateImageList.Images.RemoveByKey(INDETERMINATE_KEY);
            }
        }