/// <summary>
///
/// </summary>
/// <param name="e"></param>
protected override void OnMouseDown(MouseEventArgs e)
{
base.OnMouseDown(e);
if (!m_bVisible) return;
int nX = e.X - this.AutoScrollPosition.X;
int nY = e.Y - this.AutoScrollPosition.Y;
//
m_MouseDownPosition = new Point(nX, nY);
if (IsMouseInImageBoxBounds(nX, nY, 2))
{
if (e.Button == m_nRectMoveMouseButton)
{
if (m_bAllowMouseMove)
{
m_nImageBoxMode = ImageBoxMode.Move;
m_nRectMousePosX = nX - m_ImageBoxRect.X;
m_nRectMousePosY = nY - m_ImageBoxRect.Y;
Cursor.Current = Cursors.SizeAll;
}
}
// Fire rectangle mouse down event.
OnImageBoxMouseDown(this,
new ImageBoxMouseEventArgs(e, m_ImageBoxRect));
}
else
{
if (e.Button == m_nRectResizeMouseButton)
{
if (m_bAllowMouseResize)
{
ImageBoxBounds nOnBounds;
if (IsMouseOnImageBoxBounds(nX, nY, ImageBoxBounds.Any, out nOnBounds))
{
m_nImageBoxMode = ImageBoxMode.Resize;
m_nBoundsSelected = nOnBounds;
switch (nOnBounds)
{
case ImageBoxBounds.None:
Cursor.Current = Cursors.Default;
break;
case ImageBoxBounds.Top:
Cursor.Current = Cursors.SizeNS;
break;
case ImageBoxBounds.Bottom:
Cursor.Current = Cursors.SizeNS;
break;
case ImageBoxBounds.Left:
Cursor.Current = Cursors.SizeWE;
break;
case ImageBoxBounds.Right:
Cursor.Current = Cursors.SizeWE;
break;
case ImageBoxBounds.TopLeft:
Cursor.Current = Cursors.SizeNWSE;
break;
case ImageBoxBounds.TopRight:
Cursor.Current = Cursors.SizeNESW;
break;
case ImageBoxBounds.BottomLeft:
Cursor.Current = Cursors.SizeNESW;
break;
case ImageBoxBounds.BottomRight:
Cursor.Current = Cursors.SizeNWSE;
break;
}
}
}
}
}
if (m_bFocusControl)
{
if (!this.Focused)
this.Focus();
}
}
/// <summary>
/// Returns true if the specified coordinates are on the specified bounds
/// of the image box.
/// </summary>
/// <param name="nX">Specifies the X position.</param>
/// <param name="nY">Specifies the Y position.</param>
/// <param name="nBounds">Specifies the bounds to check for.</param>
/// <returns></returns>
private bool IsMouseOnImageBoxBounds(int nX, int nY, ImageBoxBounds nBounds)
{
int nWidthOffset = 1;
int nLengthOffset = 2;
int nRectBottom = m_ImageBoxRect.Bottom;
int nRectRight = m_ImageBoxRect.Right;
int nRectPosX = m_ImageBoxRect.X;
int nRectPosY = m_ImageBoxRect.Y;
int nRectWidth = m_ImageBoxRect.Width;
int nRectHeight = m_ImageBoxRect.Height;
if ((nRectWidth > 0) & (nRectHeight > 0))
{
if (nBounds == ImageBoxBounds.Top)
{
// Top bounds width check.
if ((nY >= nRectPosY - nWidthOffset) && (nY <= nRectPosY + nWidthOffset))
{
// Top bounds length check.
if ((nX >= nRectPosX + nLengthOffset) && (nX <= nRectRight - nLengthOffset))
{
return true;
}
}
}
else if (nBounds == ImageBoxBounds.Bottom)
{
// Bottom bounds width check.
if ((nY <= nRectBottom + nWidthOffset) && (nY >= nRectBottom - nWidthOffset))
{
// Bottom bounds length check.
if ((nX >= nRectPosX + nLengthOffset) && (nX <= nRectRight - nLengthOffset))
{
return true;
}
}
}
else if (nBounds == ImageBoxBounds.Left)
{
// Left bounds width check.
if ((nX >= nRectPosX - nWidthOffset) && (nX <= nRectPosX + nWidthOffset))
{
// Left bounds length check.
if ((nY >= nRectPosY + nLengthOffset) && (nY <= nRectBottom - nLengthOffset))
{
return true;
}
}
}
else if (nBounds == ImageBoxBounds.Right)
{
// Right bounds width check.
if ((nX <= nRectRight + nWidthOffset) && (nX >= nRectRight - nWidthOffset))
{
// Right bounds length check.
if ((nY >= nRectPosY + nLengthOffset) && (nY <= nRectBottom - nLengthOffset))
{
return true;
}
}
}
else if (nBounds == ImageBoxBounds.TopLeft)
{
// Top left bounds width check
if ((nX >= nRectPosX - nWidthOffset) && (nX <= nRectPosX + nWidthOffset))
{
// Top left bounds height check
if ((nY >= nRectPosY - nWidthOffset) && (nY <= nRectPosY + nWidthOffset))
{
return true;
}
}
}
else if (nBounds == ImageBoxBounds.TopRight)
{
// Top right bounds width check
if ((nX >= nRectRight - nWidthOffset) && (nX <= nRectRight + nWidthOffset))
{
// Top right bounds height check.
if ((nY >= nRectPosY - nWidthOffset) && (nY <= nRectPosY + nWidthOffset))
{
return true;
}
}
}
else if (nBounds == ImageBoxBounds.BottomLeft)
{
// Bottom left bounds width check
if ((nX >= nRectPosX - nWidthOffset) && (nX <= nRectPosX + nWidthOffset))
{
// bottom left bounds height check.
if ((nY >= nRectBottom - nWidthOffset) && (nY <= nRectBottom + nWidthOffset))
{
return true;
}
}
}
else if (nBounds == ImageBoxBounds.BottomRight)
{
// Bottom right bounds width check.
if ((nX >= nRectRight - nWidthOffset) && (nX <= nRectRight + nWidthOffset))
{
// bottom right bounds height check.
if ((nY >= nRectBottom - nWidthOffset) && (nY <= nRectBottom + nWidthOffset))
{
return true;
}
}
}
else if (nBounds == ImageBoxBounds.Any)
{
// Top bounds width check.
if ((nY >= nRectPosY - nWidthOffset) && (nY <= nRectPosY + nWidthOffset))
{
// Top bounds length check.
if ((nX >= nRectPosX + nLengthOffset) && (nX <= nRectRight - nLengthOffset))
{
return true;
}
}
// Bottom bounds width check.
if ((nY <= nRectBottom + nWidthOffset) && (nY >= nRectBottom - nWidthOffset))
{
// Bottom bounds length check.
if ((nX >= nRectPosX + nLengthOffset) && (nX <= nRectRight - nLengthOffset))
{
return true;
}
}
// Left bounds width check.
if ((nX >= nRectPosX - nWidthOffset) && (nX <= nRectPosX + nWidthOffset))
{
// Left bounds length check.
if ((nY >= nRectPosY + nLengthOffset) && (nY <= nRectBottom - nLengthOffset))
{
return true;
}
}
// Right bounds width check.
if ((nX <= nRectRight + nWidthOffset) && (nX >= nRectRight - nWidthOffset))
{
// Right bounds length check.
if ((nY >= nRectPosY + nLengthOffset) && (nY <= nRectBottom - nLengthOffset))
{
return true;
}
}
// Top left bounds width check
if ((nX >= nRectPosX - nWidthOffset) && (nX <= nRectPosX + nWidthOffset))
{
// Top left bounds height check
if ((nY >= nRectPosY - nWidthOffset) && (nY <= nRectPosY + nWidthOffset))
{
return true;
}
}
// Top right bounds width check
if ((nX >= nRectRight - nWidthOffset) && (nX <= nRectRight + nWidthOffset))
{
// Top right bounds height check.
if ((nY >= nRectPosY - nWidthOffset) && (nY <= nRectPosY + nWidthOffset))
{
return true;
}
}
// Bottom left bounds width check
if ((nX >= nRectPosX - nWidthOffset) && (nX <= nRectPosX + nWidthOffset))
{
// bottom left bounds height check.
if ((nY >= nRectBottom - nWidthOffset) && (nY <= nRectBottom + nWidthOffset))
{
return true;
}
}
// Bottom right bounds width check.
if ((nX >= nRectRight - nWidthOffset) && (nX <= nRectRight + nWidthOffset))
{
// bottom right bounds height check.
if ((nY >= nRectBottom - nWidthOffset) && (nY <= nRectBottom + nWidthOffset))
{
return true;
}
}
}
}
return false;
}
/// <summary>
///
/// </summary>
/// <param name="e"></param>
protected override void OnMouseUp(MouseEventArgs e)
{
base.OnMouseUp(e);
if (!m_bVisible) return;
// Set flags.
m_nImageBoxMode = ImageBoxMode.None;
m_nBoundsSelected = ImageBoxBounds.None;
m_MouseDownPosition = Point.Empty;
if (IsMouseInImageBoxBounds(e.X - this.AutoScrollPosition.X, e.Y - this.AutoScrollPosition.Y, 2))
{
OnImageBoxMouseUp(this,
new ImageBoxMouseEventArgs(e, m_ImageBoxRect));
}
}
