本文整理汇总了C#中System.Windows.Forms.ToolStripDropDown.Focus方法的典型用法代码示例。如果您正苦于以下问题：C# ToolStripDropDown.Focus方法的具体用法？C# ToolStripDropDown.Focus怎么用？C# ToolStripDropDown.Focus使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类System.Windows.Forms.ToolStripDropDown的用法示例。
在下文中一共展示了ToolStripDropDown.Focus方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C#代码示例。
示例1: ToolStripDropDownAttacher
///<summary></summary>
///<param name="keepMenuOpen">An open to keep the drop down menu open if the main window is no longer the active window.</param>
public ToolStripDropDownAttacher(ToolStripDropDown menu, Control c, bool keepMenuOpen = true) {
Menu = menu;
Control = c;
KeepMenuOpen = keepMenuOpen;
menu.AutoClose = false;
menu.Click += delegate {
isFocusing = true;
menu.Focus();
IntPtr h = GetTopWindow(c.Handle);
// after the main window is minimized and restored, clicking on
// clock will deactivate the main window title bar unless this is called:
SendMessage(h, WM_NCACTIVATE, (IntPtr) 1, (IntPtr) 0);
isFocusing = false;
};
menu.Closing += (o, e) => {
if (isClosing)
e.Cancel = false;
};
menu.KeyDown += (o, e) => {
if (e.KeyCode == Keys.Escape && !menu.AutoClose) {
CloseMenu(ToolStripDropDownCloseReason.Keyboard);
e.Handled = true;
//e.SuppressKeyPress = true;
}
};
menu.GotFocus += delegate {
// click on the control, then tab to focus on the drop down
// then minimize the main window, then restore the main window
// tabbing into the drop down deactivates the main window
var tl = GetTopWindow(c.Handle);
SendMessage(tl, WM_NCACTIVATE, (IntPtr) 1, (IntPtr) 0);
};
menu.LostFocus += delegate {
// if another window is clicked, then two issues occur:
// 1) The top level window doesn't deactivate, so two windows on the
// desktop both appear active.
// 2) When the focus returns to this program's main window, clicking
// on thedrop down shows this window's caption as deactivated.
if (!c.Focused && !isFocusing && !isClosing) {
if (KeepMenuOpen) {
IntPtr fg = GetForegroundWindow();
IntPtr tl = GetTopWindow(c.Handle);
bool b = fg == tl;
if (!b) {
SendMessage(tl, WM_NCACTIVATE, (IntPtr) 0, (IntPtr) 0);
return;
}
}
CloseMenu(ToolStripDropDownCloseReason.CloseCalled);
}
};
c.MouseDown += delegate {
ShowMenu();
};
c.GotFocus += delegate {
if (!menu.Visible && !isClosing)
ShowMenu();
};
c.LostFocus += delegate {
// if the focus was transferred to another window, then keep
// the drop down open. Otherwise if the focus was transfered to
// another control in the same window then close the menu
bool b = true;
if (KeepMenuOpen) {
IntPtr fg = GetForegroundWindow();
IntPtr tl = GetTopWindow(c.Handle);
b = tl == fg;
}
if (!menu.Focused && b) {
CloseMenu(ToolStripDropDownCloseReason.CloseCalled);
}
};
c.KeyDown += (o, e) => {
if (e.KeyData == Keys.Escape) {
e.Handled = true;
e.SuppressKeyPress = true; // stops the beep
if (menu.Visible) {
CloseMenu(ToolStripDropDownCloseReason.Keyboard);
}
}
};
c.EnabledChanged += delegate {
menu.Enabled = c.Enabled;
};
//.........这里部分代码省略.........