I would like to be able to programmatically emulate the keyboard
navigation for dialog boxes.
I have a custom hardware device with a keypad that I would like to use for
dialog box navigation.
I know about Focus(), but I'd rather do something that automatically
respected the tab order. By emulating the keyboard navigation I don't
have to worry about re-inventing complex behavior for each type of
control.
Does anyone know how to do this?
Thanks!
For Winforms, you want want the Control.GetNextControl() method
For WPF, you want the UIElement.MoveFocus() method
In Winforms:
Control nextControl = this.GetNextControl(myControl, true);
To simulate a tab press, I believe it's the following:
SendKeys.Send("{TAB}");
You could use P/Invoke to call the Windows API function keybd_event to simulate pressing the Tab key.
Bonus: you can use your device to enter tabs into a text editor as well! ;)
Related
In windows forms I have a simple TextBox:
TextBox textBox = new TextBox() { Text = "text" };
textBox.Enabled = false;
textBox.MouseEnter += (object sender, EventArgs e) =>
{
MessageBox.Show("MOUSE ENTERED"); // this never fires if the control is disabled.
};
I want to disable the users ability to interact with the control and I want the control to be styled as a disabled control. But I also want to receive MouseEnter,MouseLeave, and Click events from the control so that I can change the background cover of the control on hover and respond to clicks on the control.
But as I have just discovered if you disable a windows forms control it disabled the events as well. I know with some effort I can accomplish the same thing by checking mouse coordinates globally but it would be a lot nicer if I could just have it disabled but still receive events for it. Is that possible?
Enabled doesn't really do anything in Windows Forms itself. It is a property of windows controls in general that a disabled window doesn't receive input messages (such as mouse events and keyboard events). So no, there is no way for you to disable a control and still receive those messages. Windows just don't work that way on Windows. It's not the TextBox control filtering those messages away - they don't come in the first place.
TextBox is a great wrapper around a windows common control. When you do something like tbx.Text = "Hello";, the TextBox just sends a message to that common control, saying "change the text to Hello". If you want to change that, you need to make the control essentially from scratch. You can make some hack that reverts whatever the common control does as response to a mouse event, but these usually don't work very well and tend to break down in unexpected ways.
In practice, what you really want is probably to tweak either the way ReadOnly behaves (e.g. disabling focus as well as making the control read only, but that's again just a dirty hack), or replace the TextBox with a control that can either be a control or a label - allowing you to switch between the two. If you want the text box to stop behaving as a text box, stop it from being a text box. Problem solved :)
I'd still reconsider using ReadOnly, though. Are you sure the user would not want to select text in the text box and copy it somewhere else? Or change the reading order?
Currently I used this snip code as a result from googling.
var eventArgs = new TextCompositionEventArgs(Keyboard.PrimaryDevice,
new TextComposition(InputManager.Current, Keyboard.FocusedElement, "A"));
eventArgs.RoutedEvent = TextInputEvent;
var flag = InputManager.Current.ProcessInput(eventArgs);
It was working if I used Keyboard.Focus(TxtBox); and the TxtBox will be filled with the Keystroke.
But what I want really achieved is:
1.Drawing a box (for example, I draw box on one of the excel cell)
2.Click on the box coordinate (to change Keyboard Focus)
3.Send Keystroke to clicked excel cell
I have done step 1 and 2.
But I can't find a way to do the third step.
Somehow, the click event (using mouse event) maybe not changing Keyboard Focus automatically.
So, how do I change Keyboard focus, if possible using coordinate ?
Or maybe can I get IInputElement from a coordinate ? and then set keyboard focus to it.
Of course, all of it outside from the main application window of the WPF.
Found it !
At:
Installed InputSimulator via NuGet, no members accessible
It is working in most cases.
I said in most cases, because it is able to type in other window like excel application, but on other custom app window. There might be a case it won't work.
Hope it help for other people, looking for the same thing.
Is there any way to make InlikeKeyBoardMarkup buttons unclickable after user click on any button in? I've searched in google and as far as I understand I can only disappear ReplyKeyboardMarkup buttons, what does not satisfies me.
I am using Telegram-Bot library in C#
Can't be done visually but there is an alternative I've been using for a while:
Use editMessageReplyMarkup method and generate same keyboard layout but the button you want to become unclickable set as callback_data type with value like null or any other value you won't be using, clicking it will send Callback Query to the bot which you can simply not answer to or answerCallbackQuery it instantly (the 'clock' icon on the button will instantly disappear).
You can just delete the message of the question or edit it to say something like:
"I asked you if you like me and your replied of course."
I am developing the Internet Explorer Toolbar in c#.net using the band objects.
Now in my toolbar, I am using the textbox field to make the search enable, but in this textbox field, I am not able to use the backspace, delete, arrow keys and many other such button.
I am not sure about y I am not able to use this. Please help me about this. I found many question posted over like this, but none of them was having the specific answer.
Thanks
The problem is that the browser is eating the events for those keystrokes, so the solution is to force focus to the toolbar when the text box receives focus.
To fix it add this line to your toolbar's constructor:
yourTextBox.GotFocus += (sender, args) => OnGotFocus(args);
Also make sure you have implemented TranslateAcceleratorIO() per this example.
Compare your code to this one and see what's missing.
I want the 'Alt' to be pressed by code. It is like firing key-press event with key 'Alt' by the code, not hitting it manually. The need is, I have set 'ShortCut keys for menu, but it (the single underline on key letter) is not visible to the user unless he presses 'alt'. So i need to make the Alt be pressed by default.
Is there a way to 'press' or 'fireup' the keys in key board using c# code?
Check out the System.Windows.Forms.SendKeys class.
You can use the static Send method to send keystrokes to the active window. If you're trying to send keystrokes to another window, you'll need to use the Windows API to activate the other window first.
If you have any control over the operating system on which the program is being deployed, apparently you can force the underlined shortcut letter to always be displayed by going to Control Panel -> Display -> Appearance -> Effects -> Hide underlined letters for keyboard navigation.
(http://www.chinhdo.com/20080902/underlined-letters-windows/)
here is a complete article on use of SendKeys on codeproject
Here is how you simulate input (both mouse and keyboard).
http://msdn.microsoft.com/en-us/library/ms171548.aspx
If you look at the System.Windows.Forms.SendKeys class you will see that it provides you with what you want.
http://msdn.microsoft.com/en-us/library/system.windows.forms.sendkeys.aspx