Autodropdown of RichTextEntryPanel

[Christian Lützenkirchen]

Hi,

I derived GridRichTextBoxCellModel and GridCellRendererBase for an own implementation of the rich text dropdown-editor with XP-toolbar (V4.2.0.37). How can I automatically drop down the editor when a user starts to type printable characters after entering the (not dropped down) cell?

Regards,
Christian

[Administrator]

Hi Christian,

To get the desired behavior, please add the code below in theCurrentCellKeyPress Event. Here is a code snippet.

private void gridControl1_CurrentCellKeyPress(object sender, System.Windows.Forms.KeyPressEventArgs e)
{
GridCurrentCell cc = this.gridControl1.CurrentCell;
//your custom cell render ...
GridDerivedRichTextBoxCellRenderer cr = cc.Renderer as GridDerivedRichTextBoxCellRenderer;
if( cr != null)
{
cc.ShowDropDown();
}
}

Regards,
Haneef

[Christian Lützenkirchen]

Hi Haneef,

thank you for your example. The example has two problems:
1. The panel is opend when the tab-key is pressed so I had to filter the tab key. (It was not opened by the left or right key),
2. My bigger problem is that the first character is not shown in the panel. How can I get my panel and how can I send the pressed key?

Regards,
Christian

[Administrator]

Hi Christian ,

Issue 1 :

To show the dropdown when the Right/Left key is pressed , You need to handle the CurrentCellKeyDown Event. Here is a code snippet.

private void gridControl1_CurrentCellKeyDown(object sender, System.Windows.Forms.KeyEventArgs e)
{
GridCurrentCell cc = this.gridControl1.CurrentCell;
GridRichTextBoxCellRenderer cr = cc.Renderer as GridRichTextBoxCellRenderer;

if(cr != null && ( Keys.Right == e.KeyData || Keys.Left == e.KeyData ) )
{
cc.ShowDropDown();
e.Handled = true;
}
}

Issue 2:

Try this code to check the TabKey pressed in a cell, and assign the pressed Keychar in a richtextbox . Here is code snippet.

private void gridControl1_CurrentCellKeyPress(object sender, System.Windows.Forms.KeyPressEventArgs e)
{
GridCurrentCell cc = this.gridControl1.CurrentCell;
GridRichTextBoxCellRenderer cr = cc.Renderer as GridRichTextBoxCellRenderer;

int Tabchar = (int)e.KeyChar;
if(cr != null && Tabchar != 9)
{
cc.ShowDropDown();
GridRichTextEntryPanel panel = cr.DropDownContainer.Controls[0] as GridRichTextEntryPanel;

if(panel != null)
{
RichTextBox richBox = panel.ActiveControl as RichTextBox;
if( richBox != null)
{
richBox.Text += e.KeyChar.ToString();
richBox.SelectionStart = richBox.Text.Length;
}
}
}
}

Let me know if this helps.

Best Regards,
Haneef

[Christian Lützenkirchen]

Hi Haneef,

thank you very much. It works fine. I decided not to open then panel für tab, right or left key.

Best Regards,
Christian