Adding TextBox to 'SampleWPFModifications.cs'

[ramckay]

Hello,
I'm new to WPF. I am attempting to modify the indicator 'SampleWPFModifications.cs'. My goal is to place 2 TextBlocks and 2 TextBoxes on the ChartTrader. In the attached screenshot the controls are showing. When I try to type in either textbox the Instrument Selection box appears. I added the code from 'TextBox.cs' that addresses the PreviewKeyDown event.

            else if (State == State.Historical)
            {
                // Because we're dealing with UI elements, we need to use the Dispatcher which created the object
                // in order for us to update the contents that are created on the main UI thread
                Dispatcher.Invoke((() =>
                {
                    textBox = new TextBox();

                    textBox.PreviewKeyDown += TextBox_PreviewKeyDown;
                
                    UserControlCollection.Add(textBox);
                }));
            }
        private void TextBox_PreviewKeyDown(object sender, KeyEventArgs e)
        {
            // this is pretty dumb, but should get you started
            // might want to validate this by using SHIFT or something
            // so Overlay Instrument Selector isn't unusable...
            TextBox textBoxSender = (TextBox) sender;
            textBoxSender.Text += e.Key.ToString();
            // handle the keydown event for the text box
            e.Handled = true;
        }​
​

That stops the Instrument Selector box from appearing. I can type into the TextBox but none of the characters I type show in the TextBox. This is the code I used to add the TextBoxes and the event handler. This is my first exposure to PreviewKeyDown so the error is probably something simple.

                Dispatcher.Invoke((() =>
                {
                    chartTraderCustomTextBoxArray[0] = new TextBox()
                    {
                        FontFamily = ChartControl.Properties.LabelFont.Family,
                        FontSize = 13,
                        Foreground = ChartControl.Properties.ChartText,
                        HorizontalAlignment = HorizontalAlignment.Left,
                        Margin = new Thickness(5, 5, 5, 5),
                        Text = string.Format("{0} ", shareQuantity)
                    };

                    //textBox.PreviewKeyDown += TextBox_PreviewKeyDown;
                    chartTraderCustomTextBoxArray[0].PreviewKeyDown += SampleWPFModifications_PreviewKeyDownOne;

                    UserControlCollection.Add(textBox);
                }));
        private void SampleWPFModifications_PreviewKeyDownOne(object sender, System.Windows.Input.KeyEventArgs e)
        {
            // this is pretty dumb, but should get you started
            // might want to validate this by using SHIFT or something
            // so Overlay Instrument Selector isn't unusable...
            TextBox textBoxSender = (TextBox)sender;
            textBoxSender.Text += e.Key.ToString();
            // handle the keydown event for the text box
            e.Handled = true;
        }
​​

I initially added a screen shot but it's not showing and I'm not seeing the Upload Attachments button.
Thanks in advance for any suggestions.

[NinjaTrader_Jesse]

Hello ramckay,

That is likely related to the Foreground you are using for the textbox, do you see the text if you just create a TextBox without additional style changes?

chartTraderCustomTextBoxArray[0] = new TextBox();

[ramckay]

Hi Jesse,
That was the solution.
Thanks