private void btnCategoryGenerate_Click(object sender, EventArgs e)
{
int count = Convert.ToInt32(udNumCategories.Value);
MapWinGIS.ShapefileCategories categories = _shapefile.Categories;
if (lstFields1.SelectedItem == null)
{
return;
}
string name = lstFields1.SelectedItem.ToString().ToLower().Trim();
int index = -1;
for (int i = 0; i < _shapefile.NumFields; i++)
{
if (_shapefile.get_Field(i).Name.ToLower() == name)
{
index = i;
break;
}
}
if (index == -1)
{
return;
}
MapWinGIS.tkClassificationType classification = chkUniqueValues.Checked ? tkClassificationType.ctUniqueValues : tkClassificationType.ctNaturalBreaks;
bool showWaiting = false;
if (classification == tkClassificationType.ctUniqueValues)
{
HashSet <object> set = new HashSet <object>();
for (int i = 0; i < _shapefile.NumShapes; i++)
{
object val = _shapefile.get_CellValue(index, i);
set.Add(val);
}
if (set.Count > 300)
{
showWaiting = true;
string s = string.Format("字段 = {1}.\n唯一值数量 = {0}.\n" +
"需要加载较长时间.\n是否继续?", set.Count, "[" + name.ToUpper() + "]");
if (MessageBox.Show(s, "MapWinGisDemo", MessageBoxButtons.YesNo, MessageBoxIcon.Question) == DialogResult.No)
{
return;
}
}
set.Clear();
}
if (showWaiting)
{
this.Enabled = false;
this.Cursor = Cursors.WaitCursor;
}
else
{
btnCategoryGenerate.Enabled = false;
}
// 生成目录
categories.Generate(index, classification, count);
categories.Caption = "Categories: " + _shapefile.get_Field(index).Name;
ApplyColorScheme2Categories();
if (chkUseVariableSize.Checked)
{
ApplyVariablePointSize();
}
_shapefile.Categories.ApplyExpressions();
RefreshCategoriesList();
RedrawMap();
// 保存设置
_settings.CategoriesClassification = classification;
_settings.CategoriesFieldName = name;
_settings.CategoriesSizeRange = (int)(udMaxSize.Value - udMinSize.Value);
_settings.CategoriesCount = (int)udNumCategories.Value;
_settings.CategoriesRandomColors = chkRandomColors.Checked;
_settings.CategoriesUseGradient = chkSetGradient.Checked;
_settings.CategoriesVariableSize = chkUseVariableSize.Checked;
if (showWaiting)
{
this.Enabled = true;
this.Cursor = Cursors.Default;
}
else
{
btnCategoryGenerate.Enabled = true;
}
RefreshControlsState(null, null);
MarkStateChanged();
}
/// <summary>
/// Generates shapefile categories according to specified options
/// </summary>
private void btnOk_Click(object sender, EventArgs e)
{
if (cboField.SelectedIndex < 0)
{
Globals.MessageBoxInformation("No field for generation was selected.");
this.DialogResult = DialogResult.None;
return;
}
int count;
if (!Int32.TryParse(cboCategoriesCount.Text, out count))
{
Globals.MessageBoxError("Number of categories isn't a valid interger.");
return;
}
MapWinGIS.ShapefileCategories categories = _shapefile.Categories;
int index = ((ComboItem)cboField.SelectedItem).RealIndex;
categories.Generate(index, (MapWinGIS.tkClassificationType)cboClassificationType.SelectedIndex, count);
categories.Caption = "Categories: " + _shapefile.get_Field(index).Name;
if (chkUseVariableSize.Checked)
{
if (_shapefile.ShapefileType == ShpfileType.SHP_POINT || _shapefile.ShapefileType == ShpfileType.SHP_MULTIPOINT)
{
double step = (double)(udMaxSize.Value - udMinSize.Value) / ((double)categories.Count - 1);
for (int i = 0; i < categories.Count; i++)
{
categories.get_Item(i).DrawingOptions.PointSize = (int)udMinSize.Value + Convert.ToInt32(i * step);
}
}
else if (_shapefile.ShapefileType == ShpfileType.SHP_POLYLINE)
{
double step = (double)(udMaxSize.Value + udMinSize.Value) / (double)categories.Count;
for (int i = 0; i < categories.Count; i++)
{
categories.get_Item(i).DrawingOptions.LineWidth = (int)udMinSize.Value + Convert.ToInt32(i * step);
}
}
}
MapWinGIS.ColorScheme scheme = null;
if (icbColorScheme.SelectedIndex >= 0)
{
ColorBlend blend = (ColorBlend)icbColorScheme.ColorSchemes.List[icbColorScheme.SelectedIndex];
scheme = ColorSchemes.ColorBlend2ColorScheme(blend);
}
tkColorSchemeType type = chkRandomColors.Checked ? tkColorSchemeType.ctSchemeRandom : tkColorSchemeType.ctSchemeGraduated;
_shapefile.Categories.ApplyColorScheme(type, scheme);
if (chkSetGradient.Checked)
{
for (int i = 0; i < categories.Count; i++)
{
ShapeDrawingOptions options = categories.get_Item(i).DrawingOptions;
options.SetGradientFill(options.FillColor, 75);
options.FillType = tkFillType.ftGradient;
}
}
_shapefile.Categories.ApplyExpressions();
SaveSettings();
}