public bool DrawRectangle(IntPtr hdc, float x, float y, int width, int height, bool drawVertices, int clipWidth = 0,
int clipHeight = 0, Color?backColor = null)
{
var hdcInt = hdc.ToInt32();
return(_style.DrawRectangle(hdcInt, x, y, width, height, drawVertices, clipWidth, clipHeight,
backColor.ToUInt()));
}
private void DrawPreview()
{
if (_noEvents)
{
return;
}
if (pctPreview.Image != null)
{
pctPreview.Image.Dispose();
}
Rectangle rect = pctPreview.ClientRectangle;
Bitmap bmp = new Bitmap(rect.Width, rect.Height, System.Drawing.Imaging.PixelFormat.Format32bppArgb);
Graphics g = Graphics.FromImage(bmp);
IntPtr ptr = g.GetHdc();
// creating shape to draw
if (_shpFileType == ShpfileType.SHP_POLYGON)
{
_options.DrawRectangle(ptr, 40.0f, 40.0f, rect.Width - 80, rect.Height - 80, true, rect.Width, rect.Height, Colors.ColorToUInteger(this.BackColor));
}
else
{
_options.DrawLine(ptr, 40.0f, 40.0f, rect.Width - 80, rect.Height - 80, true, rect.Width, rect.Height, Colors.ColorToUInteger(this.BackColor));
}
g.ReleaseHdc();
pctPreview.Image = bmp;
}
/// <summary>
/// Draws shapefile category.
/// </summary>
private void DrawShapefileCategorySymbology(int hdcInt, int top, ShapeDrawingOptions options, int categoryIndex, bool hasCheckbox)
{
var categoryHeight = _layer.GetCategoryHeight(options);
var categoryWidth = _layer.GetCategoryWidth(options);
var backColor = Convert.ToUInt32(ColorTranslator.ToOle(Legend.BackColor));
var left = _bounds.Left + Constants.TextLeftPad;
if (hasCheckbox)
{
left += Constants.CategoryCheckboxWidthWithPadding;
}
if (categoryWidth != Constants.IconWidth)
{
left -= (categoryWidth - Constants.IconWidth) / 2;
}
var topCentering = (Constants.ItemHeight - Constants.IconHeight) / 2 - 1;
switch (_layer.LegendLayerType)
{
case LegendLayerType.PointShapefile:
options.DrawPoint(hdcInt, left, top, categoryWidth + 1, categoryHeight + 1, backColor);
break;
case LegendLayerType.LineShapefile:
options.DrawLine(
hdcInt,
left,
top + topCentering,
categoryWidth - 1,
Constants.IconHeight - 1,
false,
categoryWidth,
categoryHeight,
backColor);
break;
case LegendLayerType.PolygonShapefile:
options.DrawRectangle(
hdcInt,
left,
top + topCentering,
categoryWidth - 1,
Constants.IconHeight - 1,
false,
categoryWidth,
categoryHeight,
backColor);
break;
}
_layer.Elements.Add(LayerElementType.ColorBox, new Rectangle(left, top, categoryWidth, categoryHeight), categoryIndex);
}
/// <summary>
/// Draws preview on the appearance tab
/// </summary>
private void DrawAppearancePreview()
{
ShpfileType shapeType = _shapefile.ShapefileType;
for (int i = 0; i < 2; i++)
{
ShapeDrawingOptions sdo = new ShapeDrawingOptions();
PictureBox pct = new PictureBox();
pct = pictureBox1;
sdo = _shapefile.DefaultDrawingOptions;
if (pct.Image != null)
{
pct.Image.Dispose();
}
Rectangle rect = pct.ClientRectangle;
Bitmap bmp = new Bitmap(rect.Width, rect.Height, System.Drawing.Imaging.PixelFormat.Format32bppArgb);
Graphics g = Graphics.FromImage(bmp);
IntPtr ptr = g.GetHdc();
if (shapeType == ShpfileType.SHP_POINT || shapeType == ShpfileType.SHP_POINTM || shapeType == ShpfileType.SHP_POINTZ ||
shapeType == ShpfileType.SHP_MULTIPOINT || shapeType == ShpfileType.SHP_MULTIPOINTM || shapeType == ShpfileType.SHP_MULTIPOINTZ)
{
sdo.DrawPoint(ptr.ToInt32(), 0.0f, 0.0f, rect.Width, rect.Height, Colors.ColorToUInteger(Color.White));
}
else if (shapeType == ShpfileType.SHP_POLYLINE || shapeType == ShpfileType.SHP_POLYLINEZ || shapeType == ShpfileType.SHP_POLYLINEM)
{
if (sdo.UseLinePattern)
{
sdo.DrawLine(ptr.ToInt32(), 20.0f, 0.0f, 0, 0, true, rect.Width - 40, rect.Height, Colors.ColorToUInteger(Color.White));
}
else
{
int w = rect.Width - 40;
int h = rect.Height - 40;
sdo.DrawLine(ptr.ToInt32(), (rect.Width - w) / 2, (rect.Height - h) / 2, w, h, true, rect.Width, rect.Height, Colors.ColorToUInteger(Color.White));
}
}
else if (shapeType == ShpfileType.SHP_POLYGON || shapeType == ShpfileType.SHP_POLYGONZ || shapeType == ShpfileType.SHP_POLYGONM)
{
sdo.DrawRectangle(ptr.ToInt32(), rect.Width / 2 - 40, rect.Height / 2 - 40, 80, 80, true, rect.Width, rect.Height, Colors.ColorToUInteger(Color.White));
}
g.ReleaseHdc(ptr);
pct.Image = bmp;
}
}
/// <summary>
/// 绘制单元格
/// </summary>
private void dgvCategories_CellFormatting(object sender, DataGridViewCellFormattingEventArgs e)
{
if (e.ColumnIndex != CMN_STYLE)
{
return;
}
if (e.RowIndex >= 0 && e.RowIndex < _shapefile.Categories.Count)
{
System.Drawing.Image img = e.Value as System.Drawing.Image;
if (img == null)
{
return;
}
ShapefileCategory cat = _shapefile.Categories.get_Item(e.RowIndex);
if (cat == null)
{
return;
}
ShapeDrawingOptions sdo = cat.DrawingOptions;
Graphics g = Graphics.FromImage(img);
g.Clear(Color.White);
g.InterpolationMode = InterpolationMode.HighQualityBicubic;
g.SmoothingMode = SmoothingMode.HighQuality;
if (_shapefile.ShapefileType == ShpfileType.SHP_POLYGON)
{
sdo.DrawRectangle(g.GetHdc(), 0, 0, img.Width - 1, img.Height - 1, true, img.Width, img.Height, Colors.ColorToUInteger(dgvCategories.BackgroundColor));
}
else if (_shapefile.ShapefileType == ShpfileType.SHP_POLYLINE)
{
sdo.DrawLine(g.GetHdc(), 0, 0, img.Width - 1, img.Height - 1, true, img.Width, img.Height, Colors.ColorToUInteger(dgvCategories.BackgroundColor));
}
else if (_shapefile.ShapefileType == ShpfileType.SHP_POINT)
{
sdo.DrawPoint(g.GetHdc(), 0.0f, 0.0f, img.Width, img.Height, Colors.ColorToUInteger(dgvCategories.BackgroundColor));
}
g.ReleaseHdc();
g.Dispose();
}
}