/// <summary>
/// This is overridden to store a reference to the image area collection for use by the static
/// <see cref="Areas"/> property above.
/// </summary>
/// <param name="context">The descriptor context</param>
/// <param name="provider">The provider</param>
/// <param name="value">The collection as an object</param>
/// <returns>The edited collection as an object</returns>
public override object EditValue(ITypeDescriptorContext context, IServiceProvider provider, object value)
{
Areas = (ImageAreaCollection)value;
object editedValue = base.EditValue(context, provider, value);
Areas = null;
return(editedValue);
}
/// <summary>
/// This is overridden to store a reference to the image area collection for use by the static
/// <see cref="Areas"/> property above.
/// </summary>
/// <param name="context">The descriptor context</param>
/// <param name="provider">The provider</param>
/// <param name="value">The collection as an object</param>
/// <returns>The edited collection as an object</returns>
public override object EditValue(ITypeDescriptorContext context, IServiceProvider provider, object value)
{
Areas = (ImageAreaCollection)value;
object editedValue = base.EditValue(context, provider, value);
Areas = null;
return editedValue;
}
/// <summary>
/// This is used to paint the image and the image area
/// </summary>
/// <param name="sender">The sender of the event</param>
/// <param name="e">The event arguments</param>
private void pnlImage_Paint(object sender, PaintEventArgs e)
{
Graphics g = e.Graphics;
Point ptOffset = new Point(pnlImage.AutoScrollPosition.X, pnlImage.AutoScrollPosition.Y);
if (image != null)
{
this.Animate();
ImageAnimator.UpdateFrames();
g.DrawImage(image, ptOffset.X, ptOffset.Y, imageWidth, imageHeight);
}
// Draw the other areas for reference if requested
if (chkShowAll.Checked)
{
ImageAreaCollection ic = ImageMapAreaEditorDlg.Areas;
for (int nIdx = 0; nIdx < ic.Count; nIdx++)
{
if (nIdx != areaIndex)
{
ic[nIdx].DrawFocusFrame(g, ptOffset);
}
}
}
if (points.Count > 0)
{
switch (shape)
{
case ImageAreaShape.Rectangle:
UnsafeNativeMethods.DrawReversibleRectangle(g, points[0], points[1], ptOffset);
break;
case ImageAreaShape.Circle:
UnsafeNativeMethods.DrawReversibleCircle(g, points[0], radius, ptOffset);
break;
case ImageAreaShape.Ellipse:
UnsafeNativeMethods.DrawReversibleEllipse(g, points[0], points[1], ptOffset);
break;
default:
// Note that the polygon isn't closed in the designer
UnsafeNativeMethods.DrawReversiblePolygon(g, points, false, ptOffset);
break;
}
}
}
/// <summary>
/// On load, set the information labels and load the image
/// </summary>
/// <param name="sender">The sender of the event</param>
/// <param name="e">The event arguments</param>
private void ImageMapAreaEditorDlg_Load(object sender, EventArgs e)
{
try
{
this.Animate(false);
if (image == null)
{
// If there is no image at all, create a temporary image
if (imageName == null)
{
// Set a name so that the image is disposed of on close
imageName = "BLANK";
if (this.ImageHeight == 0)
{
this.ImageHeight = 300;
}
if (this.ImageWidth == 0)
{
this.ImageWidth = 500;
}
Bitmap bm = new Bitmap(this.ImageWidth, this.ImageHeight);
using (Graphics g = Graphics.FromImage(bm))
{
g.FillRectangle(Brushes.White, 0, 0, this.ImageWidth, this.ImageHeight);
}
image = (Image)bm;
}
else
{
image = Image.FromFile(imageName);
}
if (this.ImageWidth == 0)
{
this.ImageWidth = image.Width;
}
if (this.ImageHeight == 0)
{
this.ImageHeight = image.Height;
}
}
this.Animate();
pnlImage.AutoScrollMinSize = new Size(imageWidth, imageHeight);
}
catch (FileNotFoundException ex)
{
MessageBox.Show(String.Format(CultureInfo.InvariantCulture, "Unable to load image file: {0}",
ex.ToString()), "Error Loading Image", MessageBoxButtons.OK, MessageBoxIcon.Error);
btnCancel.PerformClick();
}
lblImageInfo.Text = String.Format(CultureInfo.InvariantCulture, "Image: {0} Height: {1} Width: {2}",
Path.GetFileName(imageName), imageHeight, imageWidth);
switch (shape)
{
case ImageAreaShape.Rectangle:
lblInstructions.Text = "Click and drag to define rectangle area";
break;
case ImageAreaShape.Circle:
lblInstructions.Text = "Click and drag to define circle area";
break;
case ImageAreaShape.Ellipse:
lblInstructions.Text = "Click and drag to define ellipse area";
break;
default:
lblInstructions.Text = "Click points to define the polygon";
// Can't shrink or increase the dimensions of a polygon
btnIncLeftTop.Visible = btnIncTop.Visible = btnIncRightTop.Visible = btnIncLeft.Visible =
btnIncAll.Visible = btnIncRight.Visible = btnIncLeftBottom.Visible = btnIncBottom.Visible =
btnIncRightBottom.Visible = btnDecLeftTop.Visible = btnDecTop.Visible =
btnDecRightTop.Visible = btnDecLeft.Visible = btnDecAll.Visible = btnDecRight.Visible =
btnDecLeftBottom.Visible = btnDecBottom.Visible = btnDecRightBottom.Visible = false;
break;
}
// Locate the image area in the collection being edited based on the shape and coordinates. We use
// this to know which area not to draw when the "Show All" option is on. We turn that on
// automatically if the image map is a Windows Forms image map control and it is set to owner drawn.
ImageAreaCollection ic = ImageMapAreaEditorDlg.Areas;
#if !IMAGEMAPWEB
EWSoftware.ImageMaps.Windows.Forms.ImageMap im =
(ic.ImageMapControl as EWSoftware.ImageMaps.Windows.Forms.ImageMap);
if (im != null && im.OwnerDraw)
{
chkShowAll.Checked = true;
}
#endif
string coordinates = this.Coordinates;
int idx = 0;
foreach (IImageArea a in ic)
{
if (a.Shape == shape && a.Coordinates == coordinates)
{
areaIndex = idx;
}
idx++;
}
}
