greenshot/Greenshot/Drawing/ArrowContainer.cs

134 lines
4.8 KiB
C#

/*
* Greenshot - a free and open source screenshot tool
* Copyright (C) 2007-2011 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.Drawing;
using System.Drawing.Drawing2D;
using Greenshot.Drawing.Fields;
using Greenshot.Helpers;
using Greenshot.Plugin.Drawing;
namespace Greenshot.Drawing {
/// <summary>
/// Description of LineContainer.
/// </summary>
[Serializable()]
public class ArrowContainer : LineContainer {
public enum ArrowHeadCombination { NONE, START_POINT, END_POINT, BOTH };
private static readonly AdjustableArrowCap ARROW_CAP = new AdjustableArrowCap(4, 6);
public ArrowContainer(Surface parent) : base(parent) {
AddField(GetType(), FieldType.ARROWHEADS, 2);
AddField(GetType(), FieldType.LINE_COLOR, Color.Red);
AddField(GetType(), FieldType.FILL_COLOR, Color.Transparent);
AddField(GetType(), FieldType.SHADOW, true);
AddField(GetType(), FieldType.ARROWHEADS, Greenshot.Drawing.ArrowContainer.ArrowHeadCombination.END_POINT);
}
public override void Draw(Graphics g, RenderMode rm) {
int lineThickness = GetFieldValueAsInt(FieldType.LINE_THICKNESS);
bool shadow = GetFieldValueAsBool(FieldType.SHADOW);
if (lineThickness > 0 ) {
g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
Color lineColor = GetFieldValueAsColor(FieldType.LINE_COLOR);
ArrowHeadCombination heads = (ArrowHeadCombination)GetFieldValue(FieldType.ARROWHEADS);
if (shadow) {
//draw shadow first
int basealpha = 100;
int alpha = basealpha;
int steps = 5;
int currentStep = 1;
while ( currentStep <= steps ) {
using (Pen shadowCapPen = new Pen(Color.FromArgb(alpha, 100, 100, 100))) {
shadowCapPen.Width = lineThickness;
SetArrowHeads(heads, shadowCapPen);
g.DrawLine(shadowCapPen,
this.Left + currentStep,
this.Top + currentStep,
this.Left + currentStep + this.Width,
this.Top + currentStep + this.Height);
currentStep++;
alpha = alpha - (basealpha / steps);
}
}
}
using (Pen pen = new Pen(lineColor)) {
pen.Width = lineThickness;
if ( pen.Width > 0 ) {
SetArrowHeads(heads, pen);
g.DrawLine(pen, this.Left, this.Top, this.Left + this.Width, this.Top + this.Height);
}
}
}
}
private void SetArrowHeads(ArrowHeadCombination heads, Pen pen) {
if ( heads == ArrowHeadCombination.BOTH || heads == ArrowHeadCombination.START_POINT ) {
pen.CustomStartCap = ARROW_CAP;
}
if ( heads == ArrowHeadCombination.BOTH || heads == ArrowHeadCombination.END_POINT ) {
pen.CustomEndCap = ARROW_CAP;
}
}
public override Rectangle DrawingBounds {
get {
int lineThickness = GetFieldValueAsInt(FieldType.LINE_THICKNESS);
if (lineThickness > 0) {
using (Pen pen = new Pen(Color.White)) {
pen.Width = lineThickness;
SetArrowHeads((ArrowHeadCombination)GetFieldValue(FieldType.ARROWHEADS), pen);
using (GraphicsPath path = new GraphicsPath()) {
path.AddLine(this.Left, this.Top, this.Left + this.Width, this.Top + this.Height);
Rectangle drawingBounds = Rectangle.Round(path.GetBounds(new Matrix(), pen));
drawingBounds.Inflate(2, 2);
return drawingBounds;
}
}
} else {
return Rectangle.Empty;
}
}
}
public override bool ClickableAt(int x, int y) {
int lineThickness = GetFieldValueAsInt(FieldType.LINE_THICKNESS) + 10;
if (lineThickness > 0) {
using (Pen pen = new Pen(Color.White)) {
pen.Width = lineThickness;
SetArrowHeads((ArrowHeadCombination)GetFieldValue(FieldType.ARROWHEADS), pen);
using (GraphicsPath path = new GraphicsPath()) {
path.AddLine(this.Left, this.Top, this.Left + this.Width, this.Top + this.Height);
return path.IsOutlineVisible(x, y, pen);
}
}
} else {
return false;
}
}
}
}