/// <summary>
/// Property changed callback for DataContext property
/// </summary>
private static void OnDataContextPropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
// Selector has a bug regarding DataContext change and SelectedItem property,
// where if the SelectedItem due to old DataContext is a valid item in ItemsSource
// but the SelectedItem due to new DataContext is not a valid item in ItemsSource,
// the SelectedIndex remains that of old context instead of changing to -1.
// This method is a workaround to that problem, since it is of high impact to DataGrid.
TextBlockComboBox combo = (TextBlockComboBox)d;
bool isLocalValue = (DependencyPropertyHelper.GetValueSource(combo, SelectedItemProperty).BaseValueSource == BaseValueSource.Local);
if (isLocalValue)
{
// Clear the selection and re-apply the binding.
BindingBase binding = BindingOperations.GetBindingBase(combo, SelectedItemProperty);
if (binding != null)
{
combo.ClearValue(SelectedItemProperty);
DataGridPactComboBoxColumn.ApplyBinding(binding, combo, SelectedItemProperty);
}
}
else
{
// Clear the selection by setting the local value
// and re-evaluate the property by clearing the local value.
combo.SelectedItem = null;
combo.ClearValue(SelectedItemProperty);
}
}
/// <summary>
/// Creates the visual tree for text based cells.
/// </summary>
protected override FrameworkElement GenerateElement(DataGridCell cell, object dataItem)
{
TextBlockComboBox comboBox = new TextBlockComboBox();
ApplyStyle(/* isEditing = */ false, /* defaultToElementStyle = */ false, comboBox);
ApplyColumnProperties(comboBox);
return(comboBox);
}
protected override FrameworkElement GenerateElement(DataGridCell cell, object dataItem)
{
var comboBox = new TextBlockComboBox();
comboBox.IsEditable = false;
ApplyStyle(false, false, comboBox);
ApplyColumnProperties(comboBox);
var binding = BindingOperations.GetBinding(this, ComboBox.ItemsSourceProperty);
ApplyBinding(binding, comboBox, ComboBoxEx.ItemsSourceExProperty);
return(comboBox);
}
/// <summary>
/// Creates the visual tree for text based cells.
/// </summary>
protected override FrameworkElement GenerateElement(DataGridCell cell, object dataItem)
{
TextBlockComboBox comboBox = new TextBlockComboBox();
// SyncProperties(textBlock);
//ApplyStyle(/* isEditing = */ false, /* defaultToElementStyle = */ false, comboBox);
ApplyColumnProperties(comboBox);
return(comboBox);
// PactComboBox textBlock = new PactComboBox();
// textBlock.FeatureID = 1;
//// TextBlock textBlock = new TextBlock();
// SyncProperties(textBlock);
//// ApplyStyle(/* isEditing = */ false, /* defaultToElementStyle = */ false, textBlock);
// ApplyBinding(textBlock, TextBlock.TextProperty);
// return textBlock;
}
/// <summary>
/// Creates the visual tree for text based cells.
/// </summary>
protected override FrameworkElement GenerateElement(DataGridCell cell, object dataItem)
{
TextBlockComboBox comboBox = new TextBlockComboBox();
ApplyStyle(/* isEditing = */ false, /* defaultToElementStyle = */ false, comboBox);
ApplyColumnProperties(comboBox);
return comboBox;
}
/// <summary>
/// Creates the visual tree for text based cells.
/// </summary>
protected override FrameworkElement GenerateElement(DataGridCell cell, object dataItem)
{
TextBlockComboBox comboBox = new TextBlockComboBox();
// SyncProperties(textBlock);
//ApplyStyle(/* isEditing = */ false, /* defaultToElementStyle = */ false, comboBox);
ApplyColumnProperties(comboBox);
return comboBox;
// PactComboBox textBlock = new PactComboBox();
// textBlock.FeatureID = 1;
//// TextBlock textBlock = new TextBlock();
// SyncProperties(textBlock);
//// ApplyStyle(/* isEditing = */ false, /* defaultToElementStyle = */ false, textBlock);
// ApplyBinding(textBlock, TextBlock.TextProperty);
// return textBlock;
}
