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Improved drag-and-drop for textbox with subtitle text - thx vmb :)

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git-svn-id: https://subtitleedit.googlecode.com/svn/trunk@722 99eadd0c-20b8-1223-b5c4-2a2b2df33de2
This commit is contained in:
niksedk 2011-10-14 19:07:20 +00:00
parent d83fc94248
commit 1e42a8ecd1
1 changed files with 103 additions and 0 deletions
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103
src/Controls/SETextBox.cs
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@ -1,5 +1,6 @@
using System;
using System.Windows.Forms;
using System.Drawing;
namespace Nikse.SubtitleEdit.Controls
{
@ -9,16 +10,115 @@ namespace Nikse.SubtitleEdit.Controls
public class SETextBox : TextBox
{
string _dragText = string.Empty;
int _dragStartFrom = 0;
long _dragStartTicks = 0;
public SETextBox()
{
AllowDrop = true;
DragEnter += new DragEventHandler(SETextBox_DragEnter);
DragDrop += new DragEventHandler(SETextBox_DragDrop);
MouseDown += new MouseEventHandler(SETextBox_MouseDown);
}
void SETextBox_MouseDown(object sender, MouseEventArgs e)
{
if (MouseButtons == System.Windows.Forms.MouseButtons.Left && !string.IsNullOrEmpty(_dragText))
{
Point pt = new Point(e.X, e.Y);
int index = GetCharIndexFromPosition(pt);
if (index >= _dragStartFrom && index <= _dragStartFrom + _dragText.Length)
{
if (Control.ModifierKeys == Keys.Control)
DoDragDrop(_dragText, DragDropEffects.Copy);
else if (Control.ModifierKeys == Keys.None)
DoDragDrop(_dragText, DragDropEffects.Move);
}
}
}
void SETextBox_DragDrop(object sender, DragEventArgs e)
{
Point pt = new Point(e.X, e.Y);
pt = PointToClient(pt);
int index = GetCharIndexFromPosition(pt);
string newText = (string)e.Data.GetData(DataFormats.Text);
if (Text.Trim().Length == 0)
{
Text = newText;
}
else
{
if (sender == this)
{
long milliseconds = (DateTime.Now.Ticks - _dragStartTicks) / 10000;
if (milliseconds < 400)
return; // too fast - nobody can drag'n'drop this fast
Text = Text.Remove(_dragStartFrom, _dragText.Length);
if (index > _dragStartFrom)
index -= _dragText.Length;
if (index < 0)
index = 0;
}
Text = Text.Insert(index, newText);
// fix start spaces
int endIndex = index + newText.Length;
if (index > 0 && !newText.StartsWith(" ") && Text[index - 1] != ' ')
{
Text = Text.Insert(index, " ");
endIndex++;
}
else if (index > 0 && newText.StartsWith(" ") && Text[index - 1] == ' ')
{
Text = Text.Remove(index, 1);
endIndex--;
}
// fix end spaces
if (endIndex < Text.Length && !newText.EndsWith(" ") && Text[endIndex] != ' ')
Text = Text.Insert(endIndex, " ");
else if (endIndex < Text.Length && newText.EndsWith(" ") && Text[endIndex] == ' ')
Text = Text.Remove(endIndex, 1);
}
}
void SETextBox_DragEnter(object sender, DragEventArgs e)
{
if (e.Data.GetDataPresent(DataFormats.Text))
{
if (Control.ModifierKeys == Keys.Control)
e.Effect = DragDropEffects.Copy;
else
e.Effect = DragDropEffects.Move;
}
else
{
e.Effect = DragDropEffects.None;
}
}
protected override void WndProc(ref Message m)
{
const int WM_DBLCLICK = 0xA3;
const int WM_LBUTTONDBLCLK = 0x203;
const int WM_LBUTTONDOWN = 0x0201;
if (m.Msg == WM_DBLCLICK || m.Msg == WM_LBUTTONDBLCLK)
{
SelectCurrentWord(this);
return;
}
if (m.Msg == WM_LBUTTONDOWN)
{
_dragText = SelectedText;
_dragStartFrom = SelectionStart;
_dragStartTicks = DateTime.Now.Ticks;
}
base.WndProc(ref m);
}
@ -36,6 +136,9 @@ namespace Nikse.SubtitleEdit.Controls
break;
selectionLength++;
}
if (tb.SelectionStart + selectionLength < tb.Text.Length && tb.Text[tb.SelectionStart + selectionLength] == ' ')
selectionLength++;
tb.SelectionLength = selectionLength;
if (selectionLength > 0)
this.OnMouseMove(null);