示例#1
0
        private void OnSelectionChanged(object sender, EventArgs e)
        {
            this.render = true;
            PdnGraphicsPath path = this.selection.CreatePath();

            if (this.selectedPath == null)
            {
                Invalidate();
            }
            else
            {
                this.selectedPath.Dispose();
                this.selectedPath = null;
            }

            bool fullInvalidate = false;

            this.selectedPath = path;

            // HACK: Sometimes the selection leaves behind artifacts. So do a full invalidate
            //       every 1 second.
            if (this.selectedPath.PointCount > 10 && (DateTime.Now - lastFullInvalidate > new TimeSpan(0, 0, 0, 1, 0)))
            {
                fullInvalidate = true;
            }

            // if we're moving to a simpler selection region ...
            if (this.selectedPath == null)// || this.selectedPath.PointCount == 0)
            {
                // then invalidate everything
                fullInvalidate = true;
            }
            else
            {
                // otherwise, be intelligent about it and only redraw the 'new' area
                PdnRegion xorMe = new PdnRegion(this.selectedPath);
                selectionRedrawInterior.Xor(xorMe);
                xorMe.Dispose();
            }

            float ratio    = 1.0f / (float)OwnerList.ScaleFactor.Ratio;
            int   ratioInt = (int)Math.Ceiling(ratio);

            if (this.Visible && (this.EnableSelectionOutline || this.EnableSelectionTinting))
            {
                using (PdnRegion simplified = Utility.SimplifyAndInflateRegion(selectionRedrawInterior, Utility.DefaultSimplificationFactor, 2 * ratioInt))
                {
                    Invalidate(simplified);
                }
            }

            if (fullInvalidate)
            {
                Rectangle rect = Rectangle.Inflate(Rectangle.Truncate(selectionRedrawOutline.GetBounds2()), 1, 1);
                Invalidate(rect);
                lastFullInvalidate = DateTime.Now;
            }


            this.selectionRedrawInterior.Dispose();
            this.selectionRedrawInterior = null;

            if (this.zoomInSelectedPath != null)
            {
                this.zoomInSelectedPath.Dispose();
                this.zoomInSelectedPath = null;
            }

            this.simplifiedRegionForTimer = null;

            // prepare for next call
            if (this.selectedPath != null && !this.selectedPath.IsEmpty)
            {
                this.selectionRedrawOutline  = (PdnGraphicsPath)this.selectedPath.Clone();
                this.selectionRedrawInterior = new PdnRegion(this.selectedPath);
            }
            else
            {
                if (invertedTinting)
                {
                    this.selectionRedrawInterior = new PdnRegion(new Rectangle(0, 0, this.SourceSize.Width, this.SourceSize.Height));
                }
                else
                {
                    this.selectionRedrawInterior = new PdnRegion();
                    this.selectionRedrawInterior.MakeEmpty();
                }

                Invalidate();
                this.selectionRedrawOutline = new PdnGraphicsPath();
            }
        }