/// <summary>
/// Draws the background image defined by the visual style for the specified control part
/// </summary>
/// <param name="g">The Graphics to draw on</param>
/// <param name="windowClass">The class of the part to draw</param>
/// <param name="part">The part to draw</param>
/// <param name="partState">The state of the part to draw</param>
/// <param name="drawRect">The Rectangle in which the part is drawn</param>
/// <param name="clipRect">The Rectangle that represents the clipping area for the part</param>
public static void DrawThemeBackground(Graphics g, string windowClass, int part, int partState, Rectangle drawRect, Rectangle clipRect)
{
if (g == null || drawRect.Width <= 0 || drawRect.Height <= 0 || clipRect.Width <= 0 || clipRect.Height <= 0)
{
return;
}
// open theme data
IntPtr hTheme = IntPtr.Zero;
hTheme = I3NativeMethods.OpenThemeData(hTheme, windowClass);
// make sure we have a valid handle
if (hTheme != IntPtr.Zero)
{
// get a graphics object the UxTheme can draw into
IntPtr hdc = g.GetHdc();
// get the draw and clipping rectangles
I3RECT dRect = I3RECT.FromRectangle(drawRect);
I3RECT cRect = I3RECT.FromRectangle(clipRect);
// draw the themed background
I3NativeMethods.DrawThemeBackground(hTheme, hdc, part, partState, ref dRect, ref cRect);
// clean up resources
g.ReleaseHdc(hdc);
}
// close the theme handle
I3NativeMethods.CloseThemeData(hTheme);
}
/// <summary>
/// 处理所有Paint事件
/// Processes any Paint messages in the message queue
/// </summary>
private void FlushPaintMessages()
{
I3MSG msg = new I3MSG();
while (I3NativeMethods.PeekMessage(ref msg, IntPtr.Zero, (int)I3WindowMessage.WM_PAINT, (int)I3WindowMessage.WM_PAINT, 1 /*PM_REMOVE*/))
{
I3NativeMethods.TranslateMessage(ref msg);
I3NativeMethods.DispatchMessage(ref msg);
}
}
/// <summary>
///
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void widthTextBox_KeyPress(object sender, KeyPressEventArgs e)
{
if (!char.IsDigit(e.KeyChar) && e.KeyChar != I3AsciiChars.Backspace && e.KeyChar != I3AsciiChars.Delete)
{
if ((Control.ModifierKeys & (Keys.Alt | Keys.Control)) == Keys.None)
{
e.Handled = true;
I3NativeMethods.MessageBeep(0 /*MB_OK*/);
}
}
}
/// <summary>
/// Returns a Version object that contains information about the verion
/// of the CommonControls that the application is using
/// </summary>
/// <returns>A Version object that contains information about the verion
/// of the CommonControls that the application is using</returns>
private static Version GetComctlVersion()
{
I3DLLVERSIONINFO comctlVersion = new I3DLLVERSIONINFO();
comctlVersion.cbSize = Marshal.SizeOf(typeof(I3DLLVERSIONINFO));
if (I3NativeMethods.DllGetVersion(ref comctlVersion) == 0)
{
return(new Version(comctlVersion.dwMajorVersion, comctlVersion.dwMinorVersion, comctlVersion.dwBuildNumber));
}
return(new Version());
}
/// <summary>
/// 显示下拉容器
/// Displays the drop down portion to the user
/// </summary>
protected virtual void ShowDropDown()
{
//TextBox.Location在准备编辑方法中被赋值
Point p = this.EditingTable.PointToScreen(this.TextBox.Location);
//p.Y += this.TextBox.Height + 1;
p.Y = GetDropDownContainerTop(p);
Rectangle screenBounds = Screen.GetBounds(p);
if (p.Y + this.dropDownContainer.Height > screenBounds.Bottom)
{
p.Y -= this.TextBox.Height + this.dropDownContainer.Height + 1;
}
if (p.X + this.dropDownContainer.Width > screenBounds.Right)
{
II3CellRenderer renderer = this.EditingTable.ColumnModel.GetCellRenderer(this.EditingCellPos.Column);
int buttonWidth = ((I3DropDownCellRenderer)renderer).ButtonWidth;
p.X = p.X + this.TextBox.Width + buttonWidth - this.dropDownContainer.Width;
}
this.dropDownContainer.Location = p;
this.parentForm.AddOwnedForm(this.dropDownContainer);
this.activationListener.AssignHandle(this.parentForm.Handle);
this.dropDownContainer.ShowDropDown();
this.dropDownContainer.Activate();
// A little bit of fun. We've shown the popup,
// but because we've kept the main window's
// title bar in focus the tab sequence isn't quite
// right. This can be fixed by sending a tab,
// but that on its own would shift focus to the
// second control in the form. So send a tab,
// followed by a reverse-tab.
// Send a Tab command:
I3NativeMethods.keybd_event((byte)Keys.Tab, 0, 0, 0);
I3NativeMethods.keybd_event((byte)Keys.Tab, 0, I3KeyEventFFlags.KEYEVENTF_KEYUP, 0);
// Send a reverse Tab command:
I3NativeMethods.keybd_event((byte)Keys.ShiftKey, 0, 0, 0);
I3NativeMethods.keybd_event((byte)Keys.Tab, 0, 0, 0);
I3NativeMethods.keybd_event((byte)Keys.Tab, 0, I3KeyEventFFlags.KEYEVENTF_KEYUP, 0);
I3NativeMethods.keybd_event((byte)Keys.ShiftKey, 0, I3KeyEventFFlags.KEYEVENTF_KEYUP, 0);
}
/// <summary>
/// Handler for the editors TextBox.KeyPress event
/// </summary>
/// <param name="sender">The object that raised the event</param>
/// <param name="e">A KeyPressEventArgs that contains the event data</param>
protected virtual void OnTextBoxKeyPress(object sender, KeyPressEventArgs e)
{
char enter = I3AsciiChars.CarriageReturn;
char escape = I3AsciiChars.Escape;
char tab = I3AsciiChars.HorizontalTab;
NumberFormatInfo info = CultureInfo.CurrentCulture.NumberFormat;
string decimalSeparator = info.NumberDecimalSeparator;
string groupSeparator = info.NumberGroupSeparator;
string negativeSign = info.NegativeSign;
string character = e.KeyChar.ToString();
if ((!char.IsDigit(e.KeyChar) && !character.Equals(decimalSeparator) && !character.Equals(groupSeparator)) &&
!character.Equals(negativeSign) && (e.KeyChar != tab))
{
if ((Control.ModifierKeys & (Keys.Alt | Keys.Control)) == Keys.None)
{
e.Handled = true;
if (e.KeyChar == enter)
{
if (this.EditingTable != null)
{
this.EditingTable.StopEditing();
}
}
else if (e.KeyChar == escape)
{
if (this.EditingTable != null)
{
this.EditingTable.CancelEditing();
}
}
else
{
I3NativeMethods.MessageBeep(0 /*MB_OK*/);
}
}
}
else
{
this.userEdit = true;
}
}
/// <summary>
/// 响应垂直滚动条滚动事件
/// Occurs when the Table's vertical scrollbar is scrolled
/// </summary>
/// <param name="sender">The object that Raised the event</param>
/// <param name="e">A ScrollEventArgs that contains the event data</param>
protected void OnVerticalScroll(object sender, ScrollEventArgs e)
{
int scrollVal = e.OldValue - e.NewValue;
if (scrollVal != 0)
{
Rectangle invalidateRect = new Rectangle(0, 0, this.Width - VScrollWidth, this.Height - HScrollHeight);
I3RECT scrollRect = I3RECT.FromRectangle(invalidateRect);
scrollRect.top += 1;
I3NativeMethods.ScrollWindow(this.Handle, 0, scrollVal, ref scrollRect, ref scrollRect);
if (scrollVal < 0)
{
invalidateRect.Y = invalidateRect.Bottom + scrollVal;
}
invalidateRect.Height = Math.Abs(scrollVal) + 1;
this.Invalidate(invalidateRect, false);
}
}
protected void OnHorizontalScroll(object sender, ScrollEventArgs e)
{
int scrollVal = e.OldValue - e.NewValue;
if (scrollVal != 0)
{
Rectangle invalidateRect = new Rectangle(0, 0, this.Width - VScrollWidth, this.Height - HScrollHeight);
I3RECT scrollRect = I3RECT.FromRectangle(invalidateRect);
//移动窗体的绘画区
I3NativeMethods.ScrollWindow(this.Handle, scrollVal, 0, ref scrollRect, ref scrollRect);
//计算重绘区域
if (scrollVal < 0)
{
invalidateRect.X = invalidateRect.Right + scrollVal;
}
invalidateRect.Width = Math.Abs(scrollVal) + 1;
this.Invalidate(invalidateRect, false);
}
}
/// <summary>
/// 消息钩子，处理了WM_NCACTIVATE消息和WM_ACTIVATEAPP消息
/// 这两个消息的意思？有待查找资料
/// Processes Windows messages
/// </summary>
/// <param name="m">The Windows Message to process</param>
protected override void WndProc(ref Message m)
{
base.WndProc(ref m);
if (this.owner != null && this.owner.DroppedDown)
{
if (m.Msg == (int)I3WindowMessage.WM_NCACTIVATE)
{
if (((int)m.WParam) == 0)
{
I3NativeMethods.SendMessage(this.Handle, (int)I3WindowMessage.WM_NCACTIVATE, 1, 0);
}
}
else if (m.Msg == (int)I3WindowMessage.WM_ACTIVATEAPP)
{
if ((int)m.WParam == 0)
{
this.owner.DroppedDown = false;
I3NativeMethods.PostMessage(this.Handle, (int)I3WindowMessage.WM_NCACTIVATE, 0, 0);
}
}
}
}
private bool OnNcHitTest(ref Message m)
{
Point location = PointToClient(new Point(
I3NativeMethods.LOWORD(m.LParam), I3NativeMethods.HIWORD(m.LParam)));
Rectangle gripRect = Rectangle.Empty;
if (_canResize && !_changeRegion)
{
if (_resizableLeft)
{
if (_resizableTop)
{
gripRect = new Rectangle(0, 0, 6, 6);
}
else
{
gripRect = new Rectangle(
0,
Height - 6,
6,
6);
}
}
else
{
if (_resizableTop)
{
gripRect = new Rectangle(Width - 6, 0, 6, 6);
}
else
{
gripRect = new Rectangle(
Width - 6,
Height - 6,
6,
6);
}
}
}
if (gripRect.Contains(location))
{
if (_resizableLeft)
{
if (_resizableTop)
{
m.Result = (IntPtr)I3NativeMethods.HTTOPLEFT;
return(true);
}
else
{
m.Result = (IntPtr)I3NativeMethods.HTBOTTOMLEFT;
return(true);
}
}
else
{
if (_resizableTop)
{
m.Result = (IntPtr)I3NativeMethods.HTTOPRIGHT;
return(true);
}
else
{
m.Result = (IntPtr)I3NativeMethods.HTBOTTOMRIGHT;
return(true);
}
}
}
else
{
Rectangle rectClient = ClientRectangle;
if (location.X > rectClient.Right - 3 &&
location.X <= rectClient.Right &&
!_resizableLeft)
{
m.Result = (IntPtr)I3NativeMethods.HTRIGHT;
return(true);
}
else if (location.Y > rectClient.Bottom - 3 &&
location.Y <= rectClient.Bottom &&
!_resizableTop)
{
m.Result = (IntPtr)I3NativeMethods.HTBOTTOM;
return(true);
}
else if (location.X > -1 &&
location.X < 3 &&
_resizableLeft)
{
m.Result = (IntPtr)I3NativeMethods.HTLEFT;
return(true);
}
else if (location.Y > -1 &&
location.Y < 3 &&
_resizableTop)
{
m.Result = (IntPtr)I3NativeMethods.HTTOP;
return(true);
}
}
return(false);
}