mirror of
https://github.com/greenshot/greenshot.git
synced 2025-01-26 23:22:49 -08:00
458 lines
14 KiB
C#
458 lines
14 KiB
C#
/*
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* Greenshot - a free and open source screenshot tool
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* Copyright (C) 2007-2015 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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/// <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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// 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;
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[NonSerialized]
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private Font _font;
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public Font Font {
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get {
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return _font;
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}
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}
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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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StringFormat _stringFormat = new StringFormat();
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public StringFormat StringFormat {
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get {
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return _stringFormat;
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}
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}
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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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get { return text; }
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set {
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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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if ((text == null && newText != null) || !text.Equals(newText)) {
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if (makeUndoable && allowUndoable) {
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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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Init();
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}
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protected override void InitializeFields() {
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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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[OnDeserialized]
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private void OnDeserialized(StreamingContext context) {
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Init();
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}
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protected override void Dispose(bool disposing) {
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if (disposing) {
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if (_font != null) {
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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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_stringFormat.Dispose();
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_stringFormat = null;
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}
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if (_textBox != null) {
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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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_stringFormat = new StringFormat();
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_stringFormat.Trimming = StringTrimming.EllipsisWord;
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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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base.Invalidate();
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if (_textBox != null && _textBox.Visible) {
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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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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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void TextContainer_PropertyChanged(object sender, PropertyChangedEventArgs e) {
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if (_textBox.Visible) {
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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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if (!Selected && _textBox.Visible) {
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HideTextBox();
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} else if (Selected && Status == EditStatus.DRAWING) {
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ShowTextBox();
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} else if (Selected && Status == EditStatus.IDLE && _textBox.Visible) {
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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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_textBox.Invalidate();
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}
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}
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void TextContainer_FieldChanged(object sender, FieldChangedEventArgs e) {
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if (_textBox.Visible) {
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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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_font.Dispose();
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_font = null;
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UpdateFormat();
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} else {
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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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_textBox.Invalidate();
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}
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}
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public override void OnDoubleClick() {
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ShowTextBox();
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}
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private void CreateTextBox() {
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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.None;
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_textBox.Visible = false;
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}
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private void ShowTextBox() {
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_parent.KeysLocked = true;
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_parent.Controls.Add(_textBox);
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EnsureTextBoxContrast();
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_textBox.Show();
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_textBox.Focus();
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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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Color lc = GetFieldValueAsColor(FieldType.LINE_COLOR);
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if (lc.R > 203 && lc.G > 203 && lc.B > 203) {
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_textBox.BackColor = Color.FromArgb(51, 51, 51);
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} else {
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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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_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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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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/// <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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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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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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bool boldAvailable = fam.IsStyleAvailable(FontStyle.Bold);
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if (fontBold && boldAvailable) {
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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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fs |= FontStyle.Italic;
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hasStyle = true;
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}
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if (!hasStyle) {
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bool regularAvailable = fam.IsStyleAvailable(FontStyle.Regular);
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if (regularAvailable) {
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fs = FontStyle.Regular;
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} else {
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if (boldAvailable) {
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fs = FontStyle.Bold;
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} else if(italicAvailable) {
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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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_textBox.Font = _font;
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}
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} catch (Exception ex) {
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ex.Data.Add("fontFamily", 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;
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}
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UpdateAlignment();
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}
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private void UpdateAlignment() {
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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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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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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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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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base.ApplyBounds(newBounds);
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UpdateTextBoxPosition();
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}
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private void UpdateTextBoxFormat() {
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if (_textBox == null) {
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return;
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}
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StringAlignment alignment = (StringAlignment)GetFieldValue(FieldType.TEXT_HORIZONTAL_ALIGNMENT);
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switch (alignment) {
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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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Color lineColor = GetFieldValueAsColor(FieldType.LINE_COLOR);
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_textBox.ForeColor = lineColor;
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}
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void textBox_KeyDown(object sender, KeyEventArgs e) {
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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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HideTextBox();
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e.SuppressKeyPress = true;
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}
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}
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void textBox_LostFocus(object sender, EventArgs e) {
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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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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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DrawSelectionBorder(graphics, rect);
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}
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if (text == null || text.Length == 0 ) {
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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="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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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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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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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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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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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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drawingRectange.Inflate(-textOffset, -textOffset);
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}
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using (Brush fontBrush = new SolidBrush(fontColor)) {
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if (stringFormat != null) {
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graphics.DrawString(text, font, fontBrush, drawingRectange, stringFormat);
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} else {
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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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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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