/*
* Greenshot - a free and open source screenshot tool
* Copyright (C) 2007-2014 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 .
*/
using Greenshot.Drawing.Fields;
using Greenshot.Helpers;
using Greenshot.Memento;
using Greenshot.Plugin;
using Greenshot.Plugin.Drawing;
using System;
using System.ComponentModel;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Drawing.Text;
using System.Runtime.Serialization;
using System.Windows.Forms;
namespace Greenshot.Drawing
{
///
/// Represents a textbox (extends RectangleContainer for border/background support
///
[Serializable]
public class TextContainer : RectangleContainer, ITextContainer
{
[NonSerialized]
private bool fontInvalidated = true;
// If makeUndoable is true the next text-change will make the change undoable.
// This is set to true AFTER the first change is made, as there is already a "add element" on the undo stack
private bool makeUndoable;
[NonSerialized]
private Font _font;
public Font Font
{
get
{
return _font;
}
}
[NonSerialized]
private TextBox _textBox;
///
/// The StringFormat object is not serializable!!
///
[NonSerialized]
private StringFormat _stringFormat = new StringFormat();
public StringFormat StringFormat
{
get
{
return _stringFormat;
}
}
private string text;
// there is a binding on the following property!
public string Text
{
get { return text; }
set { ChangeText(value, true); }
}
internal void ChangeText(string newText, bool allowUndoable)
{
if ((text == null && newText != null) || !text.Equals(newText))
{
if (makeUndoable && allowUndoable)
{
makeUndoable = false;
_parent.MakeUndoable(new TextChangeMemento(this), false);
}
text = newText;
OnPropertyChanged("Text");
}
}
public TextContainer(Surface parent)
: base(parent)
{
Init();
}
protected override void InitializeFields()
{
AddField(GetType(), FieldType.LINE_THICKNESS, 2);
AddField(GetType(), FieldType.LINE_COLOR, Color.Red);
AddField(GetType(), FieldType.SHADOW, true);
AddField(GetType(), FieldType.FONT_ITALIC, false);
AddField(GetType(), FieldType.FONT_BOLD, false);
AddField(GetType(), FieldType.FILL_COLOR, Color.Transparent);
AddField(GetType(), FieldType.FONT_FAMILY, FontFamily.GenericSansSerif.Name);
AddField(GetType(), FieldType.FONT_SIZE, 11f);
AddField(GetType(), FieldType.TEXT_HORIZONTAL_ALIGNMENT, HorizontalAlignment.Center);
AddField(GetType(), FieldType.TEXT_VERTICAL_ALIGNMENT, VerticalAlignment.CENTER);
}
[OnDeserialized]
private void OnDeserialized(StreamingContext context)
{
Init();
UpdateFormat();
}
protected override void Dispose(bool disposing)
{
if (disposing)
{
if (_font != null)
{
_font.Dispose();
_font = null;
}
if (_stringFormat != null)
{
_stringFormat.Dispose();
_stringFormat = null;
}
if (_textBox != null)
{
_textBox.Dispose();
_textBox = null;
}
}
base.Dispose(disposing);
}
private void Init()
{
_stringFormat = new StringFormat();
_stringFormat.Trimming = StringTrimming.EllipsisWord;
fontInvalidated = true;
CreateTextBox();
PropertyChanged += TextContainer_PropertyChanged;
FieldChanged += TextContainer_FieldChanged;
}
public void FitToText()
{
UpdateFormat();
Size textSize = TextRenderer.MeasureText(text, _font);
int lineThickness = GetFieldValueAsInt(FieldType.LINE_THICKNESS);
Width = textSize.Width + lineThickness;
Height = textSize.Height + lineThickness;
}
private void TextContainer_PropertyChanged(object sender, PropertyChangedEventArgs e)
{
if (e.PropertyName.Equals("Selected"))
{
if (!Selected && _textBox.Visible)
{
HideTextBox();
}
else if (Selected && Status == EditStatus.DRAWING)
{
ShowTextBox();
}
}
if (_textBox.Visible)
{
UpdateTextBoxPosition();
UpdateTextBoxFormat();
_textBox.Invalidate();
}
}
private void TextContainer_FieldChanged(object sender, FieldChangedEventArgs e)
{
if (_textBox.Visible)
{
UpdateTextBoxFormat();
_textBox.Invalidate();
}
else
{
UpdateFormat();
//Invalidate();
}
_font.Dispose();
_font = null;
fontInvalidated = true;
}
public override void OnDoubleClick()
{
ShowTextBox();
}
private void CreateTextBox()
{
_textBox = new TextBox();
_textBox.ImeMode = ImeMode.On;
_textBox.Multiline = true;
_textBox.AcceptsTab = true;
_textBox.AcceptsReturn = true;
_textBox.DataBindings.Add("Text", this, "Text", false, DataSourceUpdateMode.OnPropertyChanged);
_textBox.LostFocus += textBox_LostFocus;
_textBox.KeyDown += textBox_KeyDown;
_textBox.BorderStyle = BorderStyle.FixedSingle;
_textBox.Visible = false;
}
private void ShowTextBox()
{
_parent.KeysLocked = true;
_parent.Controls.Add(_textBox);
EnsureTextBoxContrast();
_textBox.Show();
_textBox.Focus();
}
///
/// Makes textbox background dark if text color is very bright
///
private void EnsureTextBoxContrast()
{
Color lc = GetFieldValueAsColor(FieldType.LINE_COLOR);
if (lc.R > 203 && lc.G > 203 && lc.B > 203)
{
_textBox.BackColor = Color.FromArgb(51, 51, 51);
}
else
{
_textBox.BackColor = Color.White;
}
}
private void HideTextBox()
{
_parent.Focus();
_textBox.Hide();
_parent.KeysLocked = false;
_parent.Controls.Remove(_textBox);
}
///
/// Make sure the size of the font is scaled
///
///
public override void Transform(Matrix matrix)
{
Rectangle rect = GuiRectangle.GetGuiRectangle(Left, Top, Width, Height);
int widthBefore = rect.Width;
int heightBefore = rect.Height;
// Transform this container
base.Transform(matrix);
rect = GuiRectangle.GetGuiRectangle(Left, Top, Width, Height);
int widthAfter = rect.Width;
int heightAfter = rect.Height;
float factor = (((float)widthAfter / widthBefore) + ((float)heightAfter / heightBefore)) / 2;
float fontSize = GetFieldValueAsFloat(FieldType.FONT_SIZE);
fontSize *= factor;
SetFieldValue(FieldType.FONT_SIZE, fontSize);
fontInvalidated = true;
}
protected void UpdateFormat()
{
string fontFamily = GetFieldValueAsString(FieldType.FONT_FAMILY);
bool fontBold = GetFieldValueAsBool(FieldType.FONT_BOLD);
bool fontItalic = GetFieldValueAsBool(FieldType.FONT_ITALIC);
float fontSize = GetFieldValueAsFloat(FieldType.FONT_SIZE);
try
{
if (fontInvalidated && fontFamily != null && fontSize != 0)
{
FontStyle fs = FontStyle.Regular;
bool hasStyle = false;
using (FontFamily fam = new FontFamily(fontFamily))
{
bool boldAvailable = fam.IsStyleAvailable(FontStyle.Bold);
if (fontBold && boldAvailable)
{
fs |= FontStyle.Bold;
hasStyle = true;
}
bool italicAvailable = fam.IsStyleAvailable(FontStyle.Italic);
if (fontItalic && italicAvailable)
{
fs |= FontStyle.Italic;
hasStyle = true;
}
if (!hasStyle)
{
bool regularAvailable = fam.IsStyleAvailable(FontStyle.Regular);
if (regularAvailable)
{
fs = FontStyle.Regular;
}
else
{
if (boldAvailable)
{
fs = FontStyle.Bold;
}
else if (italicAvailable)
{
fs = FontStyle.Italic;
}
}
}
_font = new Font(fam, fontSize, fs, GraphicsUnit.Pixel);
}
fontInvalidated = false;
}
}
catch (Exception ex)
{
ex.Data.Add("fontFamily", fontFamily);
ex.Data.Add("fontBold", fontBold);
ex.Data.Add("fontItalic", fontItalic);
ex.Data.Add("fontSize", fontSize);
throw;
}
_stringFormat.Alignment = (StringAlignment)GetFieldValue(FieldType.TEXT_HORIZONTAL_ALIGNMENT);
_stringFormat.LineAlignment = (StringAlignment)GetFieldValue(FieldType.TEXT_VERTICAL_ALIGNMENT);
}
private void UpdateTextBoxPosition()
{
Rectangle absRectangle = GuiRectangle.GetGuiRectangle(Left, Top, Width, Height);
_textBox.Left = absRectangle.Left;
_textBox.Top = absRectangle.Top;
_textBox.Width = absRectangle.Width;
_textBox.Height = absRectangle.Height;
}
public override void ApplyBounds(RectangleF newBounds)
{
base.ApplyBounds(newBounds);
UpdateTextBoxPosition();
}
private void UpdateTextBoxFormat()
{
UpdateFormat();
Color lineColor = GetFieldValueAsColor(FieldType.LINE_COLOR);
_textBox.ForeColor = lineColor;
_textBox.Font = _font;
StringAlignment horizontalAlignment = (StringAlignment)GetFieldValue(FieldType.TEXT_HORIZONTAL_ALIGNMENT);
switch (horizontalAlignment)
{
case StringAlignment.Center:
_textBox.TextAlign = HorizontalAlignment.Center;
break;
case StringAlignment.Far:
if (_textBox.RightToLeft != RightToLeft.Yes)
{
_textBox.TextAlign = HorizontalAlignment.Right;
}
else
{
_textBox.TextAlign = HorizontalAlignment.Left;
}
break;
case StringAlignment.Near:
if (_textBox.RightToLeft != RightToLeft.Yes)
{
_textBox.TextAlign = HorizontalAlignment.Left;
}
else
{
_textBox.TextAlign = HorizontalAlignment.Right;
}
break;
}
}
private void textBox_KeyDown(object sender, KeyEventArgs e)
{
// ESC and Enter/Return (w/o Shift) hide text editor
if (e.KeyCode == Keys.Escape || ((e.KeyCode == Keys.Return || e.KeyCode == Keys.Enter) && e.Modifiers == Keys.None))
{
HideTextBox();
e.SuppressKeyPress = true;
}
}
private void textBox_LostFocus(object sender, EventArgs e)
{
// next change will be made undoable
makeUndoable = true;
HideTextBox();
}
public override void Draw(Graphics graphics, RenderMode rm)
{
base.Draw(graphics, rm);
UpdateFormat();
graphics.SmoothingMode = SmoothingMode.HighQuality;
graphics.InterpolationMode = InterpolationMode.HighQualityBicubic;
graphics.CompositingQuality = CompositingQuality.HighQuality;
graphics.PixelOffsetMode = PixelOffsetMode.None;
graphics.TextRenderingHint = TextRenderingHint.SystemDefault;
Rectangle rect = GuiRectangle.GetGuiRectangle(Left, Top, Width, Height);
if (Selected && rm == RenderMode.EDIT)
{
DrawSelectionBorder(graphics, rect);
}
if (text == null || text.Length == 0)
{
return;
}
// we only draw the shadow if there is no background
bool shadow = GetFieldValueAsBool(FieldType.SHADOW);
Color fillColor = GetFieldValueAsColor(FieldType.FILL_COLOR);
int lineThickness = GetFieldValueAsInt(FieldType.LINE_THICKNESS);
Color lineColor = GetFieldValueAsColor(FieldType.LINE_COLOR);
bool drawShadow = shadow && (fillColor == Color.Transparent || fillColor == Color.Empty);
DrawText(graphics, rect, lineThickness, lineColor, drawShadow, _stringFormat, text, _font);
}
///
/// This method can be used from other containers
///
///
///
///
///
///
///
///
public static void DrawText(Graphics graphics, Rectangle drawingRectange, int lineThickness, Color fontColor, bool drawShadow, StringFormat stringFormat, string text, Font font)
{
int textOffset = (lineThickness > 0) ? (int)Math.Ceiling(lineThickness / 2d) : 0;
// draw shadow before anything else
if (drawShadow)
{
int basealpha = 100;
int alpha = basealpha;
int steps = 5;
int currentStep = 1;
while (currentStep <= steps)
{
int offset = currentStep;
Rectangle shadowRect = GuiRectangle.GetGuiRectangle(drawingRectange.Left + offset, drawingRectange.Top + offset, drawingRectange.Width, drawingRectange.Height);
if (lineThickness > 0)
{
shadowRect.Inflate(-textOffset, -textOffset);
}
using (Brush fontBrush = new SolidBrush(Color.FromArgb(alpha, 100, 100, 100)))
{
graphics.DrawString(text, font, fontBrush, shadowRect, stringFormat);
currentStep++;
alpha = alpha - basealpha / steps;
}
}
}
if (lineThickness > 0)
{
drawingRectange.Inflate(-textOffset, -textOffset);
}
using (Brush fontBrush = new SolidBrush(fontColor))
{
if (stringFormat != null)
{
graphics.DrawString(text, font, fontBrush, drawingRectange, stringFormat);
}
else
{
graphics.DrawString(text, font, fontBrush, drawingRectange);
}
}
}
public override bool ClickableAt(int x, int y)
{
Rectangle r = GuiRectangle.GetGuiRectangle(Left, Top, Width, Height);
r.Inflate(5, 5);
return r.Contains(x, y);
}
}
}