/// <summary> /// Sets focus to the default control of a dialog /// </summary> private void FocusDefaultControl() { // Check for a default control in this dialog foreach(Control c in controlList) { if (c.isDefault) { // Remove focus from the current control ClearFocus(); // Give focus to the default control controlFocus = c; controlFocus.OnFocusIn(); return; } } }
/// <summary> /// Cycles focus to the next available control /// </summary> private void OnCycleFocus(bool forward) { // This should only be handled by the dialog which owns the focused control, and // only if a control currently has focus if (controlFocus == null || controlFocus.Parent != this ) return; Control control = controlFocus; // Go through a bunch of controls for (int i = 0; i < 0xffff; i++) { control = (forward) ? GetNextControl(control) : GetPreviousControl(control); // If we've gone in a full circle, focus won't change if (control == controlFocus) return; // If the dialog accepts keybord input and the control can have focus then // move focus if (control.Parent.IsUsingKeyboardInput && control.CanHaveFocus) { controlFocus.OnFocusOut(); controlFocus = control; controlFocus.OnFocusIn(); return; } } throw new InvalidOperationException("Multiple dialogs are improperly chained together."); }
/// <summary> /// Request that this control has focus /// </summary> public static void RequestFocus(Control control) { if (controlFocus == control) return; // Already does if (!control.CanHaveFocus) return; // Can't have focus if (controlFocus != null) controlFocus.OnFocusOut(); // Set the control focus now control.OnFocusIn(); controlFocus = control; }