在ToolStripDropDown上编辑文本框时,鼠标光标消失
问题描述:
我有一个RichTextBox和两个按钮的用户控件。我试图在ToolStripButton上点击ToolStripDropDown。我使用ToolStripControlHost将我的控件放在ToolStripDrowDown上。当我在窗体工具栏上单击ToolStripButton时,我会在某个位置显示下拉菜单,并将焦点放在ToolStripControlHost控件上。鼠标指针保持在ToolStripButton之上,游标位于RichTextBox上。但是当我开始编辑RichTextBox鼠标指针消失时,只有当它不在矩形中时才能看到它。我该如何解决它?在ToolStripDropDown上编辑文本框时,鼠标光标消失
这里是我的代码:
private void toolBtnNote_Click(object sender, EventArgs e)
{
dropDownClosed = false;
noteChanged = false;
tsdd = new ToolStripDropDown();
this.tsdd.Opened += new EventHandler(tsdd_Opened);
this.tsdd.AutoSize = true;
NoteEdit ne = new NoteEdit();
ne.NoteText = note ?? "";
// appears when user clicks first button at my control
ne.OkClick += new NoteEdit.NoteEditEvent(ne_OkClick);
// appears when user clicks second button at my control
ne.CancelClick += new NoteEdit.NoteEditEvent(ne_CancelClick);
this.tbh = new ToolStripControlHost(ne, "noteEdit");
this.tbh.Padding = new Padding(0);
this.tbh.AutoSize = false;
this.tbh.Size = ne.Size;
this.tsdd.Items.Add(tbh);
this.tsdd.Padding = new Padding(0);
this.tsdd.Closing += new ToolStripDropDownClosingEventHandler(tsdd_Closing);
// show toolstripdrowdown at specific position at DataGridView
this.tsdd.Show(dgvMarks, cellRect.Location + new Size(0, cellRect.Height));
while (!this.dropDownClosed)
{
Application.DoEvents();
}
if(noteChanged) {...}
}
void ne_CancelClick()
{
tsdd.Close();
}
void ne_OkClick()
{
noteChanged = true;
tsdd.Close();
}
void tsdd_Opened(object sender, EventArgs e)
{
tbh.Focus();
}
void tsdd_Closing(object sender, ToolStripDropDownClosingEventArgs e)
{
dropDownClosed = true;
}
答
我找到了解决方案。不是最好的,但它的工作。我只是模拟点击在RichTextBox与WinApi像这样:
public class WinApiHelper
{
private const UInt32 MOUSEEVENTF_LEFTDOWN = 0x0002;
private const UInt32 MOUSEEVENTF_LEFTUP = 0x0004;
[DllImport("user32.dll")]
private static extern void mouse_event(
UInt32 dwFlags, // motion and click options
UInt32 dx, // horizontal position or change
UInt32 dy, // vertical position or change
UInt32 dwData, // wheel movement
IntPtr dwExtraInfo // application-defined information
);
public static void SendClick(Point location)
{
Cursor.Position = location;
mouse_event(MOUSEEVENTF_LEFTDOWN, 0, 0, 0, new System.IntPtr());
mouse_event(MOUSEEVENTF_LEFTUP, 0, 0, 0, new System.IntPtr());
}
}
private void toolBtnNote_Click(object sender, EventArgs e)
{
dropDownClosed = false;
noteChanged = false;
dgvMarks.Focus();
tsdd = new ToolStripDropDown();
this.tsdd.Opened += new EventHandler(tsdd_Opened);
this.tsdd.AutoSize = true;
NoteEdit ne = new NoteEdit();
ne.NoteText = note ?? "";
ne.OkClick += new NoteEdit.NoteEditEvent(ne_OkClick);
ne.CancelClick += new NoteEdit.NoteEditEvent(ne_CancelClick);
this.tbh = new ToolStripControlHost(ne, "noteEdit");
this.tbh.Padding = new Padding(0);
this.tbh.AutoSize = false;
this.tbh.Size = ne.Size;
this.tsdd.Items.Add(tbh);
this.tsdd.Padding = new Padding(0);
this.tsdd.Closing += new ToolStripDropDownClosingEventHandler(tsdd_Closing);
this.tsdd.Show(dgvMarks, cellRect.Location + new Size(0, cellRect.Height));
// emulate click on richtextbox at dropdown
WinApiHelper.SendClick(tsdd.Location + new Size(ne.Rtb.Location) + new Size(5, 5));
while (!this.dropDownClosed)
{
Application.DoEvents();
}
if (noteChanged)
{...}
}
答
这是鼠标光标当你开始编辑一个文本框,或RichTextBox中隐藏正常的行为。当你移动鼠标时它应该被恢复。您还应该注意,如果您尝试在TextChanged中调用它或类似的名称,调用Cursor.Show将不会产生效果。
感谢您的要求。是的,它可以恢复,但仅限于窗体显示矩形。所以,当鼠标在我的表单上时,光标消失。我需要点击我的表格来显示光标。奇怪的是,当我从ContextMenuStrip项目点击显示相同的toolstripdropdown(相同的代码)时,一切都正常,并且当我移动鼠标时,光标在表单上结束。只有当我从ToolBar按钮调用toolstripdropdown时才会出现问题。看起来焦点停留在ToolStripButton。 – mao