public void TransformForm2(byte opacity)
{
if (DesignMode)
return;
#if _DEMO
MessageBox.Show("AlphaForm Transformer Demo Mode.\n\nPlease see www.alpha-forms.com for information","Demo Mode");
#endif
m_lwin = new LayeredWindowForm();
// This control becomes transparent
BackColor = Color.Transparent;
// ParentForm becomes transparent via color key
ParentForm.TransparencyKey = Color.FromArgb(0,0,1);
ParentForm.BackColor = ParentForm.TransparencyKey;
ParentForm.Visible = false;
ParentForm.ShowInTaskbar = false;
// Setting the layered window's TopMost to the main
// form's value keeps the relative Z order the same for
// the pair of windows
m_lwin.TopMost = ParentForm.TopMost;
if (BackgroundImage.Size != ParentForm.Size)
{
m_alphaBitmap = new Bitmap(ParentForm.Width, ParentForm.Height);
Graphics gr = Graphics.FromImage(m_alphaBitmap);
gr.SmoothingMode = SmoothingMode.None;
gr.CompositingQuality = CompositingQuality.HighQuality;
gr.InterpolationMode = InterpolationMode.HighQualityBilinear;
gr.DrawImage(BackgroundImage, new Rectangle(0, 0, ParentForm.Width, ParentForm.Height),
new Rectangle(0, 0, BackgroundImage.Width, BackgroundImage.Height), GraphicsUnit.Pixel);
gr.Dispose();
}
else
m_alphaBitmap = new Bitmap(BackgroundImage);
BackgroundImage = null;
// Set the layered window bitmap
m_lwin.SetBits(m_alphaBitmap,opacity);
// For each transparent control, copy the layered window background
// into the control's background
foreach (Control cntrl in Controls)
{
if (cntrl.Tag != null && cntrl.Tag.ToString() == "back")
{
Bitmap bm = new Bitmap(cntrl.Width,cntrl.Height);
Graphics cg = Graphics.FromImage(bm);
cg.DrawImage(m_alphaBitmap, new Rectangle(0,0,cntrl.Width,cntrl.Height),
new Rectangle(cntrl.Location.X, cntrl.Location.Y, cntrl.Width, cntrl.Height),
GraphicsUnit.Pixel);
cntrl.BackgroundImage = bm;
cg.Dispose();
}
}
m_lwin.MouseDown += new MouseEventHandler(LayeredFormMouseDown);
m_lwin.MouseMove += new MouseEventHandler(LayeredFormMouseMove);
m_lwin.MouseUp += new MouseEventHandler(LayeredFormMouseUp);
ParentForm.Move += new EventHandler(ParentFormMove);
ParentForm.Opacity = opacity/255.0;
m_lwin.Location = ParentForm.Location;
m_lwin.Text = ParentForm.Text;
// ParentForm becomes owned by layered window
ParentForm.Visible = true;
ParentForm.Owner = m_lwin;
m_lwin.Visible = true;
}
/// <summary>
/// This methods does the following:
/// <list type="number">
/// <item>
/// <description>Constructs a desktop composited frame window and shows it. This window's
/// bitmap is built from this control's <c>BackgroundImage</c>.</description>
/// </item>
/// <item>
/// <description>Calls <c>UpdateSkin</c> to updated the frame window's image data
/// and build the main form's Region.</description>
/// </item>
/// <item>
/// <description>The BackgroundImage is set to the main form's Background image.</description>
/// </item>
/// </list>
/// <para>
/// This method should only be called *once* from the main form's
/// Load event. If the user wants to change the image at runtime,
/// <see cref="AlphaFormTransformer.UpdateSkin" /> should be used.
/// </para>
/// </summary>
/// <param name="opacity">
/// Opacity of form [0..255]
/// </param>
public void TransformForm(byte opacity)
{
if (DesignMode)
return;
#if _DEMO
MessageBox.Show("AlphaForm Transformer Demo Mode.\n\nPlease see www.alpha-forms.com for information","Demo Mode");
#endif
m_lwin = new LayeredWindowForm();
// Setting the layered window's TopMost to the main
// form's value keeps the relative Z order the same for
// the pair of windows
m_lwin.TopMost = ParentForm.TopMost;
// We don't want the layered window form to show in the
// taskbar now do we :-)
m_lwin.ShowInTaskbar = false;
// These will handle dragging for both the layered window
// and the main form.
m_lwin.MouseDown += new MouseEventHandler(LayeredFormMouseDown);
m_lwin.MouseMove += new MouseEventHandler(LayeredFormMouseMove);
m_lwin.MouseUp += new MouseEventHandler(LayeredFormMouseUp);
if (m_transFormerDrags)
{
MouseDown += new MouseEventHandler(FormMouseDown);
MouseMove += new MouseEventHandler(FormMouseMove);
MouseUp += new MouseEventHandler(FormMouseUp);
}
ParentForm.Move += new EventHandler(ParentFormMove);
// Form must be shown by specifying an owner so that activation of
// the layered form activates the main app. It's also needed to keep
// the Z order of the two windows in sync. Note that it's not
// necessary to set the size of the layered window. The call to
// SetBits() does this.
m_lwin.Visible = false;
m_lwin.Show(ParentForm);
m_lwin.Location = ParentForm.Location;
ParentForm.Opacity = opacity/255.0;
if (BackgroundImage != null)
{
// Update the layered window bits and form region
UpdateSkin(
new Bitmap(BackgroundImage),
ParentForm.BackgroundImage != null ? new Bitmap(ParentForm.BackgroundImage) : null,
opacity);
m_lwin.Visible = true;
if (BackColor == Color.Transparent)
{
// user may have it this way in the designer too see the
// main form's background image, but it can't be set to
// this at runtime as the background image will be copied from
// the main form to this control. Even in the absence of a background
// image, it can't be transparent as it won't composite correctly
// with the main form at runtime (quirk with Panel? - irrelevant in any case)
BackColor = SystemColors.Control;
}
}
}
