Applied zoom patch, currently needs to be activated by pressing "Z" in the capture form. This will change later.

git-svn-id: http://svn.code.sf.net/p/greenshot/code/trunk@2272 7dccd23d-a4a3-4e1f-8c07-b4c1b4018ab4

Greenshot/Forms/CaptureForm.cs

@@ -61,6 +61,7 @@ namespace Greenshot.Forms {
 
 		private Point previousMousePos = Point.Empty;
 		private FixMode fixMode = FixMode.None;
+		private ZoomForm zoomForm = null;
 
 		public Rectangle CaptureRectangle {
 			get {
@@ -91,6 +92,7 @@ namespace Greenshot.Forms {
 
 			// clean up
 			this.FormClosed += delegate {
+				RemoveZoom();
 				currentForm = null;
 				LOG.Debug("Remove CaptureForm from currentForm");
 			};
@@ -127,6 +129,30 @@ namespace Greenshot.Forms {
 			this.TopMost = true;
 		}
 
+		private void CreateZoom() {
+			if (zoomForm == null) {
+				zoomForm = new ZoomForm(capture);
+				zoomForm.Show();
+				WindowDetails.ToForeground(zoomForm.Handle);
+
+				// Fix missing focus issue
+				WindowDetails.ToForeground(this.Handle);
+				this.TopMost = false;
+				zoomForm.TopMost = true;
+				Activate();
+			}
+		}
+
+		private void RemoveZoom() {
+			if (zoomForm != null) {
+				zoomForm.Close();
+				// Fix missing focus issue
+				WindowDetails.ToForeground(this.Handle);
+				this.TopMost = true;
+				zoomForm = null;
+			}
+		}
+
 		#region key handling		
 		void CaptureFormKeyUp(object sender, KeyEventArgs e) {
 			if (e.KeyCode == Keys.ShiftKey) {
@@ -148,6 +174,13 @@ namespace Greenshot.Forms {
 				// Toggle mouse cursor
 				capture.CursorVisible = !capture.CursorVisible;
 				Invalidate();
+			} else if (e.KeyCode == Keys.Z) {
+				// Toggle zoom
+				if (zoomForm == null) {
+					CreateZoom();
+				} else {
+					RemoveZoom();
+				}
 			} else if (e.KeyCode == Keys.Space) {
 				switch (captureMode) {
 					case CaptureMode.Region:
@@ -231,6 +264,11 @@ namespace Greenshot.Forms {
 			bool horizontalMove = false;
 			bool verticalMove = false;
 
+			// Change the zoom location
+			if (zoomForm != null) {
+				zoomForm.MouseLocation = cursorPos;
+			}
+
 			if (lastPos.X != cursorPos.X) {
 				horizontalMove = true;
 			}

Greenshot/Forms/ZoomForm.cs

@@ -0,0 +1,114 @@
+/*
+ * Greenshot - a free and open source screenshot tool
+ * Copyright (C) 2007-2012  Thomas Braun, Jens Klingen, Robin Krom
+ * 
+ * For more information see: http://getgreenshot.org/
+ * The Greenshot project is hosted on Sourceforge: http://sourceforge.net/projects/greenshot/
+ * 
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 1 of the License, or
+ * (at your option) any later version.
+ * 
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+using System;
+using System.Collections.Generic;
+using System.Windows.Forms;
+using System.Drawing;
+using Greenshot.Plugin;
+using System.Drawing.Drawing2D;
+using GreenshotPlugin.Controls;
+
+namespace Greenshot.Forms {
+	/// <summary>
+	/// This form will show the area around the mouse of the current capture
+	/// </summary>
+	public class ZoomForm : FormWithoutActivation {
+		private static readonly log4net.ILog LOG = log4net.LogManager.GetLogger(typeof(ZoomForm));
+		private ICapture captureToZoom = null;
+		private Point mouseLocation = Point.Empty;
+
+		public ZoomForm(ICapture captureToZoom) {
+			InitializeComponent();
+			this.captureToZoom = captureToZoom;
+			Zoom = 400;
+		}
+
+		public Point MouseLocation {
+			get {
+				return mouseLocation;
+			}
+			set {
+				mouseLocation = value;
+				this.Location = new Point(mouseLocation.X + 20, mouseLocation.Y + 20);
+				this.Invalidate();
+			}
+		}
+
+		public int Zoom {
+			get;
+			set;
+		}
+
+		protected override void OnPaint(PaintEventArgs e) {
+			if (captureToZoom == null || captureToZoom.Image == null) {
+				return;
+			}
+			Graphics graphics = e.Graphics;
+			graphics.SmoothingMode = SmoothingMode.None;
+			graphics.InterpolationMode = InterpolationMode.NearestNeighbor;
+			graphics.CompositingQuality = CompositingQuality.HighSpeed;
+			graphics.PixelOffsetMode = PixelOffsetMode.None;
+			Rectangle clipRectangle = e.ClipRectangle;
+			float zoom = (float)100 / (float)Zoom;
+
+			int sourceWidth = (int)(Width * zoom);
+			int sourceHeight = (int)(Height * zoom);
+			Rectangle sourceRectangle = new Rectangle(MouseLocation.X - (sourceHeight / 2), MouseLocation.Y - (sourceHeight / 2), sourceWidth, sourceHeight);
+			Rectangle destinationRectangle = new Rectangle(0, 0, Width, Height);
+			graphics.DrawImage(captureToZoom.Image, destinationRectangle, sourceRectangle, GraphicsUnit.Pixel);
+
+			int pixelThickness = Zoom / 100;
+			using (Pen pen = new Pen(Color.Black, pixelThickness)) {
+				int halfWidth = (Width >> 1) - (pixelThickness >> 1);
+				int halfWidthEnd = (Width >> 1) - pixelThickness;
+				int halfHeight = (Height >> 1) - (pixelThickness >> 1);
+				int halfHeightEnd = (Height >> 1) - pixelThickness;
+				graphics.DrawLine(pen, halfWidth, 0, halfWidth, halfHeightEnd);
+				graphics.DrawLine(pen, halfWidth, halfHeightEnd + pixelThickness, halfWidth, Height);
+				graphics.DrawLine(pen, 0, halfHeight, halfWidthEnd, halfHeight);
+				graphics.DrawLine(pen, halfWidthEnd + pixelThickness, halfHeight, Width, halfHeight);
+			}
+		}
+
+		private void InitializeComponent() {
+			this.SuspendLayout();
+			// 
+			// ZoomForm
+			// 
+			this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.None;
+			this.BackgroundImageLayout = System.Windows.Forms.ImageLayout.None;
+			this.ClientSize = new System.Drawing.Size(100, 100);
+			this.ControlBox = false;
+			this.DoubleBuffered = true;
+			this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.None;
+			this.MaximizeBox = false;
+			this.MinimizeBox = false;
+			this.MinimumSize = new Size(50, 50);
+			this.Name = "Zoom";
+			this.ShowIcon = false;
+			this.ShowInTaskbar = false;
+			this.SizeGripStyle = System.Windows.Forms.SizeGripStyle.Hide;
+			this.StartPosition = System.Windows.Forms.FormStartPosition.Manual;
+			this.TopMost = true;
+			this.ResumeLayout(false);
+		}
+	}
+}

Greenshot/Greenshot.csproj

@@ -181,6 +181,7 @@
     </Compile>
     <None Include="App.config" />
     <None Include="Helpers\AviHelper.cs" />
+    <Compile Include="Forms\ZoomForm.cs" />
     <Compile Include="Helpers\CaptureHelper.cs" />
     <Compile Include="Helpers\Colors.cs" />
     <Compile Include="Helpers\CopyData.cs" />
@@ -206,7 +207,6 @@
     <Compile Include="Helpers\UpdateHelper.cs" />
     <Compile Include="Helpers\EnvironmentInfo.cs" />
     <Compile Include="Helpers\GuiRectangle.cs" />
-    <Compile Include="Helpers\LogHelper.cs" />
     <Compile Include="Helpers\MailHelper.cs" />
     <Compile Include="Helpers\PluginHelper.cs" />
     <Compile Include="Helpers\PrintHelper.cs" />