I need to have a Button on a UserControl (not Form) in a windows application to respond to "Enter" hit, the way a button which is set as the Accept Button of a Form works.
I cannot make the button to be focused, since I need other controls to be focused with tab change.
Any help is really appreciated :)
The AcceptButton is a property of Form and cannot be used for the UserControl. You can simply override ProcessCmdKey though and this will work so long as the user control has focus. Otherwise you will need to use the AcceptButton of the form separately or override the ProcessCmdKey in the form if you have multiple controls which could be active.
protected override bool ProcessCmdKey(ref Message msg, Keys keyData)
{
if (keyData == Keys.Enter)
{
button.PerformClick();
return true;
}
return base.ProcessCmdKey(ref msg, keyData);
}
If you set the Modifier property on the button to "Public", you can use the button as AcceptButton on the form. Unfortunately you cannot do it design-time with the properties window of Visual Studio, but you can do it in code.
public Form1()
{
InitializeComponent();
this.AcceptButton = userControl11.button1;
}
I know it's an old question, and already answered, however I use this in some situations:
private void UserControl11_Load(object sender, EventArgs e)
{
this.FindForm().AcceptButton = Button1;
}
Related
I have an mdiParent form in which i have a save method. Now I want that whenever i press Ctrl+S in my activeMdiChild form the parents Save method should get called. Any hint or suggestion is welcome.
Thanx in advance.
If you have a MenuStrip in the MDI Parent Form, then you don't need to do anything else than adding a menu with the Ctrl+S shortcut. Then if the user press those combination even in child form, the code for that menu of parent will execute.
But if you don't want to add a menu, then you can override ProcessCmdKey in the "MDI Parent Form" and check if the Ctrl+S combination was pressed, then perform the desired action:
protected override bool ProcessCmdKey(ref Message msg, Keys keyData)
{
if (keyData == (Keys.Control | Keys.S))
{
MessageBox.Show("Handled in main form.");
return true;
}
return base.ProcessCmdKey(ref msg, keyData);
}
The
ProcessCmdKey
method overrides the base ContainerControl.ProcessCmdKey
implementation to provide additional handling of main menu command
keys and MDI accelerators.
Handle the KeyDown event in activeMdiChild .
private void activeMdiChild _KeyDown(object sender, KeyEventArgs e) {
if (e.KeyCode == Keys.S && e.Modifiers == Keys.Control)
{
dynamic parent = this.Parent;
parent.Save();
}
}
EDIT: as mentioned in comments, mdiParent.Save must be public
One of possible solutions:
1. Create an interface
ISave
{
void Save();
}
2. Let your parent form inherit interface
3. In your child form check for ctrl + s if so do
ISave saver = this.Parent as ISave;
if(saver != null)
saver.Save();
That's all
I made a program in WinForms that shows a blank screen, and then if you press Enter then something happens..
well i used this code:
private void Form1_KeyDown(object sender, KeyEventArgs e)
{
if (e.KeyCode == Keys.Enter)
{
label1.Visible = false;
Colors.Start();
}
Now when I tried to add some buttons to the blank screen, the option to click on Enter just don't work anymore... no matter what I do. and please don't earse this question, I'm kind of new in programming and I know there's alot of questions like that one, but I couldn't understand them...
thanks
Is the form's AcceptButton property assigned to a button?
If so, that could be grabbing the Enter keystroke first.
An example of the suggestion by Hans Passant:
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
protected override bool ProcessCmdKey(ref Message msg, Keys keyData)
{
if (keyData == Keys.Enter)
{
MessageBox.Show("Enter");
return true; // optionally prevent further action(s) on Enter; such as Button clicks
}
return base.ProcessCmdKey(ref msg, keyData);
}
}
Note that if you return true, then controls like the buttons will not get the Enter keystroke.
Is there anyway to check if a menu item event is coming from a click in the menu or from a short cut key being pressed?
I've tried adding event handlers to the key press and key down events, however these events aren't being "fired" when it's a shortcut key that's pressed (They do work as expected when it's not a shortcut key). I couldn't find anything in the sender object that was different between the menu click or shortcut click.
You can catch all key combinations by overriding ProcessCmdKey:
protected override bool ProcessCmdKey(ref Message msg, Keys keyData)
{
if (keyData == (Keys.Control | Keys.F))
{
Console.WriteLine("My code ran from shortcut");
myFunction();
}
return base.ProcessCmdKey(ref msg, keyData);
}
private void ToolStripMenuItem_click(object sender ...)
{
Console.WriteLine("My code ran from menu item");
myFunction();
}
void myFunction()
{
//your functionality here
}
Well to get help, you should post what you have tried. (Your source)
You can use a enum for this:
enum Sender
{
Shortcut,
Menu
}
void MenuEvent(Sender sender)
{
if (sender == Sender.Shortcut)
{
}
else
{
}
}
//if you click from the menu
void btnMenuClick()
{
MenuEvent(Sender.Menu);
}
//if you use shortcut
void OnShortcutEvent()
{
MenuEvent(Sender.Shortcut);
}
Edit: I guess my answer was to vague so I edited the code. I hope its more clear now, but I must say the OP should give more details as well, such as posting some code.
I see a single solution to this problem - override the ToolStripMenuItem's ProcessCmdKey method which is raised when a shortcut is processed. In this case, you can determine when a click was caused by a shortcut. Obviously, you need to use your own class of the ToolstripMenuItem instead of the standard one.
Handle the MouseDown event to process your mouse-click.
menuItem.MouseDown += new MouseEventHandler(Process_Mouse_Click_Handler);
Handle the Click event to process your shortcut.
menuItem.Click+= new EventHandler(Process_Shortcut_Handler);
I am working on a C# WinForm application in Visual Studio 2008 and are using DevExpress.
I have added shortcuts to Some of the buttons (DevExpress SimpleButton) which triggers a button click (CTRL + R, CTRL B and so on...). I would like to show the shortcut texts in a tooltip next to each button when the user press and hold the CTRL key.
I have tried to use the DevExpress control 'ToolTipController' and that works OK if I only have one tooltip. But I would like to show more than one tooltip at a time. It seems like only the last tooltip that is added is shown.
Is it possible to show more than one tooltip at a time? Or does anyone have any other suggestion on how to solve this problem?
I solved this by creating a WPF control that looks similar to a standard tooltip (small box with a label). I then did an override on ProcessCmdKey and OnKeyUp on my form to listen to CTRL key down and key up.
When the user presses and holds down the CTRL key I loop through all my controls that has a shortcut and creates a WPF control on top of that control. For each WPF control I set the corresponding shortcut text. When the CTRL key is released I remove all WPF controls in OnKeyUp.
protected override bool ProcessCmdKey(ref Message msg, Keys keyData)
{ if ((msg.Msg == WM_KEYDOWN) && ModifierKeys == Keys.Control && !_isKeyDown)
{
_isKeyDown = true;
ShowShortCutToolTips();
this.Focus();
return true;
}
return base.ProcessCmdKey(ref msg, keyData);
}
protected override void OnKeyUp(KeyEventArgs e)
{
base.OnKeyUp(e);
if(e.KeyValue == 17 || e.Control) // 17 = Control Key
{
_isKeyDown = false;
HideShortCutToolTips();
}
}
I've created custom button derived from a normal .Net button and have added the following property to add a short cut key combination:
public Keys ShortCutKey { get; set; }
I want this combination to fire the click event of the button but have no idea how to implement this when the button is placed on a form. I know the standard way of doing a button shortcut is to use the & before the short cut character but I need to use a key combination.
Any ideas?
Many Thanks
Override the form's ProcessCmdKey() method to detect shortcut keystrokes. Like this:
private bool findShortCut(Control.ControlCollection ctls, Keys keydata) {
foreach (Control ctl in ctls) {
var btn = ctl as MyButton;
if (btn != null && btn.ShortCutKey == keydata) {
btn.PerformClick();
return true;
}
if (findShortCut(ctl.Controls, keydata)) return true;
}
return false;
}
protected override bool ProcessCmdKey(ref Message msg, Keys keyData) {
if (findShortCut(this.Controls, keyData)) return true;
return base.ProcessCmdKey(ref msg, keyData);
}
Where MyButton is assumed to be your custom button control class.
I'm assuming you are using WinForms, given that the ampersand character is used in WinForms control captions to denote the shortcut character. If that is the case, then you can use the Button.PerformClick() method on a WinForms Button in order to fire the Click event manually.
If this is not the case and you are, in fact, using WPF; then take a look at the link Dmitry has posted in his comment for WPF Input Bindings.