public TextBinding(INotifyPropertyChanged dataTarget,
string writingSystemId,
WeSayTextBox widgetTarget)
{
Debug.Assert(dataTarget != null);
_dataTarget = dataTarget;
_dataTarget.PropertyChanged += OnDataPropertyChanged;
_writingSystemId = writingSystemId;
_textBoxTarget = widgetTarget;
_textBoxTarget.TextChanged += OnTextBoxChanged;
_textBoxTarget.HandleDestroyed += _textBoxTarget_HandleDestroyed;
_textBoxTarget.Disposed += _textBoxTarget_Disposed;
_textBoxTarget.Enter += OnTextBoxEntered;
_textBoxTarget.Leave += OnTextBoxExit;
_textBoxTarget.LostFocus+=OnTextBoxExit;
}
private WeSayTextBox AddTextBox(WritingSystem writingSystem, MultiTextBase multiText)
{
WeSayTextBox box = new WeSayTextBox(writingSystem, Name);
box.ReadOnly = (_visibility == CommonEnumerations.VisibilitySetting.ReadOnly);
box.Multiline = true;
box.WordWrap = true;
box.IsSpellCheckingEnabled = _isSpellCheckingEnabled;
//box.Enabled = !box.ReadOnly;
_textBoxes.Add(box);
box.Name = Name.Replace("-mtc", "") + "_" + writingSystem.Id;
//for automated tests to find this particular guy
box.Text = multiText[writingSystem.Id];
box.TextChanged += OnTextOfSomeBoxChanged;
box.KeyDown += OnKeyDownInSomeBox;
box.MouseWheel += subControl_MouseWheel;
return box;
}
private static Label AddWritingSystemLabel(WeSayTextBox box)
{
Label label = new Label();
label.Text = box.WritingSystem.Abbreviation;
label.ForeColor = DisplaySettings.Default.WritingSystemLabelColor;
label.Anchor = AnchorStyles.Left | AnchorStyles.Top;
label.Font = _writingSystemLabelFont;
label.AutoSize = true;
// Graphics g = CreateGraphics();
// int descent = box.Font.FontFamily.GetCellDescent(box.Font.Style);
// int descentPixel = (int) (box.Font.Size * descent / box.Font.FontFamily.GetEmHeight(box.Font.Style));
//
// //todo: this only takes into account the textbox descent, not the label's!
// label.Location = new Point(0, (int) (box.Bottom -
// ( g.MeasureString(label.Text, label.Font).Height + descentPixel )) );
//todo: switch to TextRenderer.Measure
int labelAscentInPixels =
(int)
(label.Font.Size * label.Font.FontFamily.GetCellAscent(label.Font.Style) /
label.Font.FontFamily.GetEmHeight(box.Font.Style));
int contentAscentInPixels =
(int)
(box.Font.Size * box.Font.FontFamily.GetCellAscent(box.Font.Style) /
label.Font.FontFamily.GetEmHeight(box.Font.Style));
int howMuchFartherDownToPlaceLabelThanText = Math.Max(0,
contentAscentInPixels -
labelAscentInPixels);
label.Margin = new Padding(0, box.Top + howMuchFartherDownToPlaceLabelThanText, 0, 0);
return label;
}
/// <summary>
/// Drop our connections to everything so garbage collection can happen and we aren't
/// a zombie responding to data change events.
/// </summary>
private void TearDown()
{
if (null != _pendingValueChange)//nb: string.emtpy is still a value we want to set!
{
SetTargetValue(_pendingValueChange);
}
//Debug.WriteLine(" BindingTearDown boundTo: " + this._textBoxTarget.Name);
if (_dataTarget == null)
{
return; //teardown was called twice
}
_dataTarget.PropertyChanged -= OnDataPropertyChanged;
_dataTarget = null;
_textBoxTarget.TextChanged -= OnTextBoxChanged;
_textBoxTarget.HandleDestroyed -= _textBoxTarget_HandleDestroyed;
_textBoxTarget.Disposed -= _textBoxTarget_Disposed;
_textBoxTarget = null;
}
