mirror of
https://github.com/greenshot/greenshot.git
synced 2025-01-10 07:42:47 -08:00
629 lines
22 KiB
C#
629 lines
22 KiB
C#
/*
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* Greenshot - a free and open source screenshot tool
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* Copyright (C) 2007-2016 Thomas Braun, Jens Klingen, Robin Krom
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*
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* For more information see: http://getgreenshot.org/
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* The Greenshot project is hosted on GitHub https://github.com/greenshot/greenshot
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 1 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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using Greenshot.Drawing.Fields;
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using Greenshot.Helpers;
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using Greenshot.Memento;
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using Greenshot.Plugin.Drawing;
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using GreenshotPlugin.Interfaces.Drawing;
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using System;
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using System.ComponentModel;
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using System.Diagnostics;
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using System.Drawing;
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using System.Drawing.Drawing2D;
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using System.Drawing.Text;
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using System.Runtime.Serialization;
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using System.Windows.Forms;
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namespace Greenshot.Drawing
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{
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/// <summary>
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/// Represents a textbox (extends RectangleContainer for border/background support
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/// </summary>
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[Serializable]
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public class TextContainer : RectangleContainer, ITextContainer
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{
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// If makeUndoable is true the next text-change will make the change undoable.
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// This is set to true AFTER the first change is made, as there is already a "add element" on the undo stack
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// Although the name is wrong, we can't change it due to file serialization
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// ReSharper disable once InconsistentNaming
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private bool makeUndoable;
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[NonSerialized]
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private Font _font;
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public Font Font => _font;
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[NonSerialized]
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private TextBox _textBox;
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/// <summary>
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/// The StringFormat object is not serializable!!
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/// </summary>
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[NonSerialized]
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private StringFormat _stringFormat = new StringFormat();
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public StringFormat StringFormat => _stringFormat;
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// Although the name is wrong, we can't change it due to file serialization
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// ReSharper disable once InconsistentNaming
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private string text;
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// there is a binding on the following property!
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public string Text
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{
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get { return text; }
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set
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{
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ChangeText(value, true);
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}
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}
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internal void ChangeText(string newText, bool allowUndoable)
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{
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if ((text == null && newText != null) || !string.Equals(text, newText))
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{
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if (makeUndoable && allowUndoable)
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{
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makeUndoable = false;
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_parent.MakeUndoable(new TextChangeMemento(this), false);
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}
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text = newText;
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OnPropertyChanged("Text");
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}
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}
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public TextContainer(Surface parent) : base(parent)
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{
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Init();
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}
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protected override void InitializeFields()
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{
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AddField(GetType(), FieldType.LINE_THICKNESS, 2);
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AddField(GetType(), FieldType.LINE_COLOR, Color.Red);
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AddField(GetType(), FieldType.SHADOW, true);
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AddField(GetType(), FieldType.FONT_ITALIC, false);
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AddField(GetType(), FieldType.FONT_BOLD, false);
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AddField(GetType(), FieldType.FILL_COLOR, Color.Transparent);
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AddField(GetType(), FieldType.FONT_FAMILY, FontFamily.GenericSansSerif.Name);
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AddField(GetType(), FieldType.FONT_SIZE, 11f);
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AddField(GetType(), FieldType.TEXT_HORIZONTAL_ALIGNMENT, StringAlignment.Center);
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AddField(GetType(), FieldType.TEXT_VERTICAL_ALIGNMENT, StringAlignment.Center);
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}
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/// <summary>
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/// Do some logic to make sure all field are initiated correctly
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/// </summary>
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/// <param name="streamingContext">StreamingContext</param>
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protected override void OnDeserialized(StreamingContext streamingContext)
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{
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base.OnDeserialized(streamingContext);
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Init();
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}
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protected override void Dispose(bool disposing)
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{
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if (disposing)
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{
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if (_font != null)
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{
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_font.Dispose();
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_font = null;
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}
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if (_stringFormat != null)
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{
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_stringFormat.Dispose();
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_stringFormat = null;
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}
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if (_textBox != null)
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{
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_textBox.Dispose();
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_textBox = null;
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}
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}
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base.Dispose(disposing);
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}
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private void Init()
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{
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_stringFormat = new StringFormat
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{
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Trimming = StringTrimming.EllipsisWord
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};
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CreateTextBox();
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UpdateFormat();
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UpdateTextBoxFormat();
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PropertyChanged += TextContainer_PropertyChanged;
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FieldChanged += TextContainer_FieldChanged;
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}
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public override void Invalidate()
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{
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base.Invalidate();
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if (_textBox != null && _textBox.Visible)
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{
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_textBox.Invalidate();
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}
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}
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public void FitToText()
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{
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Size textSize = TextRenderer.MeasureText(text, _font);
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int lineThickness = GetFieldValueAsInt(FieldType.LINE_THICKNESS);
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Width = textSize.Width + lineThickness;
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Height = textSize.Height + lineThickness;
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}
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private void TextContainer_PropertyChanged(object sender, PropertyChangedEventArgs e)
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{
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if (_textBox == null)
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{
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return;
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}
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if (_textBox.Visible)
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{
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_textBox.Invalidate();
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}
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UpdateTextBoxPosition();
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UpdateTextBoxFormat();
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if (e.PropertyName.Equals("Selected"))
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{
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if (!Selected && _textBox.Visible)
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{
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HideTextBox();
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}
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else if (Selected && Status == EditStatus.DRAWING)
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{
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ShowTextBox();
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}
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else if (_parent != null && Selected && Status == EditStatus.IDLE && _textBox.Visible)
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{
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// Fix (workaround) for BUG-1698
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_parent.KeysLocked = true;
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}
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}
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if (_textBox.Visible)
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{
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_textBox.Invalidate();
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}
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}
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private void TextContainer_FieldChanged(object sender, FieldChangedEventArgs e)
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{
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if (_textBox == null)
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{
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return;
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}
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if (_textBox.Visible)
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{
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_textBox.Invalidate();
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}
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// Only dispose the font, and re-create it, when a font field has changed.
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if (e.Field.FieldType.Name.StartsWith("FONT"))
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{
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if (_font != null)
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{
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_font.Dispose();
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_font = null;
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}
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UpdateFormat();
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}
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else
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{
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UpdateAlignment();
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}
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UpdateTextBoxFormat();
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if (_textBox.Visible)
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{
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_textBox.Invalidate();
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}
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}
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public override void OnDoubleClick()
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{
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ShowTextBox();
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}
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private void CreateTextBox()
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{
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_textBox = new TextBox
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{
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ImeMode = ImeMode.On,
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Multiline = true,
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AcceptsTab = true,
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AcceptsReturn = true,
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BorderStyle = BorderStyle.None,
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Visible = false
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};
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_textBox.DataBindings.Add("Text", this, "Text", false, DataSourceUpdateMode.OnPropertyChanged);
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_textBox.LostFocus += textBox_LostFocus;
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_textBox.KeyDown += textBox_KeyDown;
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}
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private void ShowTextBox()
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{
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if (_parent != null)
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{
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_parent.KeysLocked = true;
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_parent.Controls.Add(_textBox);
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}
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EnsureTextBoxContrast();
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if (_textBox != null)
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{
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_textBox.Show();
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_textBox.Focus();
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}
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}
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/// <summary>
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/// Makes textbox background dark if text color is very bright
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/// </summary>
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private void EnsureTextBoxContrast()
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{
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if (_textBox == null)
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{
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return;
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}
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Color lc = GetFieldValueAsColor(FieldType.LINE_COLOR);
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if (lc.R > 203 && lc.G > 203 && lc.B > 203)
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{
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_textBox.BackColor = Color.FromArgb(51, 51, 51);
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}
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else
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{
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_textBox.BackColor = Color.White;
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}
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}
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private void HideTextBox()
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{
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_parent.Focus();
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_textBox?.Hide();
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_parent.KeysLocked = false;
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_parent.Controls.Remove(_textBox);
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}
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/// <summary>
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/// Make sure the size of the font is scaled
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/// </summary>
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/// <param name="matrix"></param>
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public override void Transform(Matrix matrix)
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{
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Rectangle rect = GuiRectangle.GetGuiRectangle(Left, Top, Width, Height);
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int pixelsBefore = rect.Width * rect.Height;
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// Transform this container
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base.Transform(matrix);
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rect = GuiRectangle.GetGuiRectangle(Left, Top, Width, Height);
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int pixelsAfter = rect.Width * rect.Height;
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float factor = pixelsAfter / (float)pixelsBefore;
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float fontSize = GetFieldValueAsFloat(FieldType.FONT_SIZE);
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fontSize *= factor;
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SetFieldValue(FieldType.FONT_SIZE, fontSize);
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UpdateFormat();
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}
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private Font CreateFont(string fontFamilyName, bool fontBold, bool fontItalic, float fontSize)
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{
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FontStyle fontStyle = FontStyle.Regular;
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bool hasStyle = false;
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using (var fontFamily = new FontFamily(fontFamilyName))
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{
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bool boldAvailable = fontFamily.IsStyleAvailable(FontStyle.Bold);
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if (fontBold && boldAvailable)
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{
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fontStyle |= FontStyle.Bold;
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hasStyle = true;
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}
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bool italicAvailable = fontFamily.IsStyleAvailable(FontStyle.Italic);
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if (fontItalic && italicAvailable)
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{
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fontStyle |= FontStyle.Italic;
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hasStyle = true;
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}
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if (!hasStyle)
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{
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bool regularAvailable = fontFamily.IsStyleAvailable(FontStyle.Regular);
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if (regularAvailable)
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{
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fontStyle = FontStyle.Regular;
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}
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else
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{
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if (boldAvailable)
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{
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fontStyle = FontStyle.Bold;
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}
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else if (italicAvailable)
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{
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fontStyle = FontStyle.Italic;
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}
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}
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}
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return new Font(fontFamily, fontSize, fontStyle, GraphicsUnit.Pixel);
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}
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}
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/// <summary>
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/// Generate the Font-Formal so we can draw correctly
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/// </summary>
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protected void UpdateFormat()
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{
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if (_textBox == null)
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{
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return;
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}
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string fontFamily = GetFieldValueAsString(FieldType.FONT_FAMILY);
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bool fontBold = GetFieldValueAsBool(FieldType.FONT_BOLD);
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bool fontItalic = GetFieldValueAsBool(FieldType.FONT_ITALIC);
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float fontSize = GetFieldValueAsFloat(FieldType.FONT_SIZE);
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try
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{
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var newFont = CreateFont(fontFamily, fontBold, fontItalic, fontSize);
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_font?.Dispose();
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_font = newFont;
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_textBox.Font = _font;
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}
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catch (Exception ex)
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{
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// Problem, try again with the default
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try
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{
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fontFamily = FontFamily.GenericSansSerif.Name;
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SetFieldValue(FieldType.FONT_FAMILY, fontFamily);
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var newFont = CreateFont(fontFamily, fontBold, fontItalic, fontSize);
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_font?.Dispose();
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_font = newFont;
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_textBox.Font = _font;
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}
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catch (Exception)
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{
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// When this happens... the PC is broken
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ex.Data.Add("fontFamilyName", fontFamily);
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ex.Data.Add("fontBold", fontBold);
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ex.Data.Add("fontItalic", fontItalic);
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ex.Data.Add("fontSize", fontSize);
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throw ex;
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}
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}
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UpdateAlignment();
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}
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private void UpdateAlignment()
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{
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_stringFormat.Alignment = (StringAlignment)GetFieldValue(FieldType.TEXT_HORIZONTAL_ALIGNMENT);
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_stringFormat.LineAlignment = (StringAlignment)GetFieldValue(FieldType.TEXT_VERTICAL_ALIGNMENT);
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}
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/// <summary>
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/// This will create the textbox exactly to the inner size of the element
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/// is a bit of a hack, but for now it seems to work...
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/// </summary>
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private void UpdateTextBoxPosition()
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{
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if (_textBox == null)
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{
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return;
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}
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int lineThickness = GetFieldValueAsInt(FieldType.LINE_THICKNESS);
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int lineWidth = (int)Math.Floor(lineThickness / 2d);
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int correction = (lineThickness + 1) % 2;
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if (lineThickness <= 1)
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{
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lineWidth = 1;
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correction = -1;
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}
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Rectangle absRectangle = GuiRectangle.GetGuiRectangle(Left, Top, Width, Height);
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_textBox.Left = absRectangle.Left + lineWidth;
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_textBox.Top = absRectangle.Top + lineWidth;
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if (lineThickness <= 1)
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{
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lineWidth = 0;
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}
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_textBox.Width = absRectangle.Width - 2 * lineWidth + correction;
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_textBox.Height = absRectangle.Height - 2 * lineWidth + correction;
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}
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public override void ApplyBounds(RectangleF newBounds)
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{
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base.ApplyBounds(newBounds);
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UpdateTextBoxPosition();
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}
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private void UpdateTextBoxFormat()
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{
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if (_textBox == null)
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{
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return;
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}
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var alignment = (StringAlignment)GetFieldValue(FieldType.TEXT_HORIZONTAL_ALIGNMENT);
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switch (alignment)
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{
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case StringAlignment.Near:
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_textBox.TextAlign = HorizontalAlignment.Left;
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break;
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case StringAlignment.Far:
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_textBox.TextAlign = HorizontalAlignment.Right;
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break;
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case StringAlignment.Center:
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_textBox.TextAlign = HorizontalAlignment.Center;
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break;
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}
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var lineColor = GetFieldValueAsColor(FieldType.LINE_COLOR);
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_textBox.ForeColor = lineColor;
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}
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private void textBox_KeyDown(object sender, KeyEventArgs e)
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{
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// ESC and Enter/Return (w/o Shift) hide text editor
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if (e.KeyCode == Keys.Escape || ((e.KeyCode == Keys.Return || e.KeyCode == Keys.Enter) && e.Modifiers == Keys.None))
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{
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HideTextBox();
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e.SuppressKeyPress = true;
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}
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if (e.Control && e.KeyCode == Keys.A)
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{
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_textBox.SelectAll();
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}
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// Added for FEATURE-1064
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if (e.KeyCode == Keys.Back && e.Control)
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{
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e.SuppressKeyPress = true;
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int selStart = _textBox.SelectionStart;
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while (selStart > 0 && _textBox.Text.Substring(selStart - 1, 1) == " ")
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{
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selStart--;
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}
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int prevSpacePos = -1;
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if (selStart != 0)
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{
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prevSpacePos = _textBox.Text.LastIndexOf(' ', selStart - 1);
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}
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_textBox.Select(prevSpacePos + 1, _textBox.SelectionStart - prevSpacePos - 1);
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_textBox.SelectedText = "";
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}
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}
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private void textBox_LostFocus(object sender, EventArgs e)
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{
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// next change will be made undoable
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makeUndoable = true;
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HideTextBox();
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}
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public override void Draw(Graphics graphics, RenderMode rm)
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{
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base.Draw(graphics, rm);
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graphics.SmoothingMode = SmoothingMode.HighQuality;
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graphics.InterpolationMode = InterpolationMode.HighQualityBicubic;
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graphics.CompositingQuality = CompositingQuality.HighQuality;
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graphics.PixelOffsetMode = PixelOffsetMode.None;
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graphics.TextRenderingHint = TextRenderingHint.SystemDefault;
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Rectangle rect = GuiRectangle.GetGuiRectangle(Left, Top, Width, Height);
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if (Selected && rm == RenderMode.EDIT)
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{
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DrawSelectionBorder(graphics, rect);
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}
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if (string.IsNullOrEmpty(text))
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{
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return;
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}
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// we only draw the shadow if there is no background
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bool shadow = GetFieldValueAsBool(FieldType.SHADOW);
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Color fillColor = GetFieldValueAsColor(FieldType.FILL_COLOR);
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int lineThickness = GetFieldValueAsInt(FieldType.LINE_THICKNESS);
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Color lineColor = GetFieldValueAsColor(FieldType.LINE_COLOR);
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bool drawShadow = shadow && (fillColor == Color.Transparent || fillColor == Color.Empty);
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DrawText(graphics, rect, lineThickness, lineColor, drawShadow, _stringFormat, text, _font);
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}
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/// <summary>
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/// This method can be used from other containers
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/// </summary>
|
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/// <param name="graphics"></param>
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/// <param name="drawingRectange"></param>
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/// <param name="lineThickness"></param>
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/// <param name="fontColor"></param>
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/// <param name="drawShadow"></param>
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/// <param name="stringFormat"></param>
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/// <param name="text"></param>
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/// <param name="font"></param>
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public static void DrawText(Graphics graphics, Rectangle drawingRectange, int lineThickness, Color fontColor, bool drawShadow, StringFormat stringFormat, string text, Font font)
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{
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#if DEBUG
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Debug.Assert(font != null);
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#else
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if (font == null)
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{
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return;
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}
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#endif
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int textOffset = lineThickness > 0 ? (int)Math.Ceiling(lineThickness / 2d) : 0;
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// draw shadow before anything else
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if (drawShadow)
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{
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int basealpha = 100;
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int alpha = basealpha;
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int steps = 5;
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int currentStep = 1;
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while (currentStep <= steps)
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{
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int offset = currentStep;
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Rectangle shadowRect = GuiRectangle.GetGuiRectangle(drawingRectange.Left + offset, drawingRectange.Top + offset, drawingRectange.Width, drawingRectange.Height);
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if (lineThickness > 0)
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{
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shadowRect.Inflate(-textOffset, -textOffset);
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}
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using (Brush fontBrush = new SolidBrush(Color.FromArgb(alpha, 100, 100, 100)))
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{
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graphics.DrawString(text, font, fontBrush, shadowRect, stringFormat);
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currentStep++;
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alpha = alpha - basealpha / steps;
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}
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}
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}
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if (lineThickness > 0)
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{
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drawingRectange.Inflate(-textOffset, -textOffset);
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}
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using (Brush fontBrush = new SolidBrush(fontColor))
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{
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if (stringFormat != null)
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{
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graphics.DrawString(text, font, fontBrush, drawingRectange, stringFormat);
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}
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else
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{
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graphics.DrawString(text, font, fontBrush, drawingRectange);
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}
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}
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}
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public override bool ClickableAt(int x, int y)
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{
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Rectangle r = GuiRectangle.GetGuiRectangle(Left, Top, Width, Height);
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r.Inflate(5, 5);
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return r.Contains(x, y);
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}
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}
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}
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