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387 lines
13 KiB
C#
387 lines
13 KiB
C#
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/*
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* Greenshot - a free and open source screenshot tool
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* Copyright (C) 2007-2013 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 Sourceforge: http://sourceforge.net/projects/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;
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using Greenshot.Plugin.Drawing;
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using System;
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using System.ComponentModel;
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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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private bool fontInvalidated = true;
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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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private bool makeUndoable = false;
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private Font font;
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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;
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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) || !text.Equals(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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[NonSerialized]
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private TextBox textBox;
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public TextContainer(Surface parent)
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: base(parent)
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{
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Init();
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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, HorizontalAlignment.Center);
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AddField(GetType(), FieldType.TEXT_VERTICAL_ALIGNMENT, VerticalAlignment.CENTER);
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stringFormat = new StringFormat();
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stringFormat.Trimming = StringTrimming.EllipsisWord;
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}
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[OnDeserialized]
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private void OnDeserialized(StreamingContext context)
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{
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stringFormat = new StringFormat();
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Init();
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UpdateFormat();
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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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CreateTextBox();
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PropertyChanged += TextContainer_PropertyChanged;
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FieldChanged += TextContainer_FieldChanged;
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}
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public void FitToText()
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{
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UpdateFormat();
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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 (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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}
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if (textBox.Visible)
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{
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UpdateTextBoxPosition();
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UpdateTextBoxFormat();
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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.Visible)
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{
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UpdateTextBoxFormat();
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textBox.Invalidate();
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}
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else
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{
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UpdateFormat();
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//Invalidate();
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}
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font.Dispose();
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font = null;
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fontInvalidated = true;
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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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textBox.Focus();
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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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textBox.ImeMode = ImeMode.On;
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textBox.Multiline = true;
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textBox.AcceptsTab = true;
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textBox.AcceptsReturn = true;
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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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textBox.BorderStyle = BorderStyle.FixedSingle;
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textBox.Visible = false;
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}
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private void ShowTextBox()
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{
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parent.KeysLocked = true;
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parent.Controls.Add(textBox);
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textBox.Show();
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textBox.Focus();
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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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private void UpdateFormat()
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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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if (fontInvalidated && fontFamily != null && fontSize != 0)
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{
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FontStyle fs = FontStyle.Regular;
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bool hasStyle = false;
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using (FontFamily fam = new FontFamily(fontFamily))
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{
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bool boldAvailable = fam.IsStyleAvailable(FontStyle.Bold);
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if (fontBold && boldAvailable)
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{
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fs |= FontStyle.Bold;
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hasStyle = true;
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}
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bool italicAvailable = fam.IsStyleAvailable(FontStyle.Italic);
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if (fontItalic && italicAvailable)
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{
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fs |= 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 = fam.IsStyleAvailable(FontStyle.Regular);
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if (regularAvailable)
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{
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fs = 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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fs = FontStyle.Bold;
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}
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else if (italicAvailable)
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{
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fs = FontStyle.Italic;
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}
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}
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}
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font = new Font(fam, fontSize, fs, GraphicsUnit.Pixel);
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}
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fontInvalidated = false;
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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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private void UpdateTextBoxPosition()
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{
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textBox.Left = Left;
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textBox.Top = Top;
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textBox.Width = Width;
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textBox.Height = Height;
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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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UpdateFormat();
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Color lineColor = GetFieldValueAsColor(FieldType.LINE_COLOR);
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textBox.ForeColor = lineColor;
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textBox.Font = font;
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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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}
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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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UpdateFormat();
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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 (text == null || text.Length == 0)
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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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int textOffset = (lineThickness > 0) ? (int)Math.Ceiling(lineThickness / 2d) : 0;
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// draw shadow before anything else
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if (shadow && (fillColor == Color.Transparent || fillColor == Color.Empty))
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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(Left + offset, Top + offset, Width, 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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Color lineColor = GetFieldValueAsColor(FieldType.LINE_COLOR);
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Rectangle fontRect = rect;
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if (lineThickness > 0)
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{
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graphics.SmoothingMode = SmoothingMode.HighSpeed;
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fontRect.Inflate(-textOffset, -textOffset);
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}
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graphics.SmoothingMode = SmoothingMode.HighQuality;
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using (Brush fontBrush = new SolidBrush(lineColor))
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{
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graphics.DrawString(text, font, fontBrush, fontRect, stringFormat);
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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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