渲染 render

时间：2015-01-16 08:40:57 阅读：226 评论：0 收藏：0 [点我收藏+]

标签：

前台

<esri:Map x:Name="MyMap" WrapAround="True" Extent="-15000000,2000000,-7000000,8000000"> <esri:ArcGISTiledMapServiceLayer ID="BaseMapLayer" Url="http://services.arcgisonline.com/ArcGIS/rest/services/World_Topo_Map/MapServer" /> <esri:GraphicsLayer ID="MyGraphicsLayer" /> </esri:Map>

</Grid> </UserControl>

后台

using System; using System.Collections.Generic; using System.Linq; using System.Windows; using System.Windows.Controls; using System.Windows.Input; using System.Windows.Media; using System.Windows.Shapes; using ESRI.ArcGIS.Client; using ESRI.ArcGIS.Client.Symbols; using ESRI.ArcGIS.Client.Tasks;

namespace ArcGISSilverlightSDK { public partial class Thematic_Interactive : UserControl { List<ThematicItem> ThematicItemList = new List<ThematicItem>(); List<List<SolidColorBrush>> ColorList = new List<List<SolidColorBrush>>(); int _colorShadeIndex = 0; int _thematicListIndex = 0; FeatureSet _featureSet = null; int _classType = 0; // EqualInterval = 1; Quantile = 0; int _classCount = 6; int _lastGeneratedClassCount = 0; bool _legendGridCollapsed; bool _classGridCollapsed;

public Thematic_Interactive() { InitializeComponent();

MyMap.PropertyChanged += MyMap_PropertyChanged; }

void MyMap_PropertyChanged(object sender, System.ComponentModel.PropertyChangedEventArgs e) { if (e.PropertyName == "SpatialReference") { MyMap.PropertyChanged -= MyMap_PropertyChanged;

_legendGridCollapsed = false; _classGridCollapsed = false;

LegendCollapsedTriangle.MouseLeftButtonUp += Triangle_MouseLeftButtonUp; LegendExpandedTriangle.MouseLeftButtonUp += Triangle_MouseLeftButtonUp; ClassCollapsedTriangle.MouseLeftButtonUp += Triangle_MouseLeftButtonUp; ClassExpandedTriangle.MouseLeftButtonUp += Triangle_MouseLeftButtonUp;

// Get start value for number of classifications in XAML. _lastGeneratedClassCount = Convert.ToInt32(((ComboBoxItem)ClassCountCombo.SelectedItem).Content);

// Set query where clause to include features with an area greater than 70 square miles. This // will effectively exclude the District of Columbia from attributes to avoid skewing classifications. ESRI.ArcGIS.Client.Tasks.Query query = new ESRI.ArcGIS.Client.Tasks.Query() { Where = "SQMI > 70", OutSpatialReference = MyMap.SpatialReference, ReturnGeometry = true }; query.OutFields.Add("*");

QueryTask queryTask = new QueryTask("http://sampleserver1.arcgisonline.com/ArcGIS/rest/services/Demographics/ESRI_Census_USA/MapServer/5");

queryTask.ExecuteCompleted += (evtsender, args) => { if (args.FeatureSet == null) return; _featureSet = args.FeatureSet; SetRangeValues(); RenderButton.IsEnabled = true; };

queryTask.ExecuteAsync(query);

CreateColorList(); CreateThematicList(); } }

public struct ThematicItem { public string Name { get; set; } public string Description { get; set; } public string CalcField { get; set; } public double Min { get; set; } public double Max { get; set; } public string MinName { get; set; } public string MaxName { get; set; } public List<double> RangeStarts { get; set; }

}

private void CreateColorList() { ColorList = new List<List<SolidColorBrush>>();

List<SolidColorBrush> BlueShades = new List<SolidColorBrush>(); List<SolidColorBrush> RedShades = new List<SolidColorBrush>(); List<SolidColorBrush> GreenShades = new List<SolidColorBrush>(); List<SolidColorBrush> YellowShades = new List<SolidColorBrush>(); List<SolidColorBrush> MagentaShades = new List<SolidColorBrush>(); List<SolidColorBrush> CyanShades = new List<SolidColorBrush>();

int rgbFactor = 255 / _classCount;

for (int j = 0; j < 256; j = j + rgbFactor) { BlueShades.Add(new SolidColorBrush(Color.FromArgb(192, (byte)j, (byte)j, 255))); RedShades.Add(new SolidColorBrush(Color.FromArgb(192, 255, (byte)j, (byte)j))); GreenShades.Add(new SolidColorBrush(Color.FromArgb(192, (byte)j, 255, (byte)j))); YellowShades.Add(new SolidColorBrush(Color.FromArgb(192, 255, 255, (byte)j))); MagentaShades.Add(new SolidColorBrush(Color.FromArgb(192, 255, (byte)j, 255))); CyanShades.Add(new SolidColorBrush(Color.FromArgb(192, (byte)j, 255, 255))); }

ColorList.Add(BlueShades); ColorList.Add(RedShades); ColorList.Add(GreenShades); ColorList.Add(YellowShades); ColorList.Add(MagentaShades); ColorList.Add(CyanShades);

foreach (List<SolidColorBrush> brushList in ColorList) { brushList.Reverse(); }

List<SolidColorBrush> MixedShades = new List<SolidColorBrush>(); if (_classCount > 5) MixedShades.Add(new SolidColorBrush(Color.FromArgb(192, 0, 255, 255))); if (_classCount > 4) MixedShades.Add(new SolidColorBrush(Color.FromArgb(192, 255, 0, 255))); if (_classCount > 3) MixedShades.Add(new SolidColorBrush(Color.FromArgb(192, 255, 255, 0))); MixedShades.Add(new SolidColorBrush(Color.FromArgb(192, 0, 255, 0))); MixedShades.Add(new SolidColorBrush(Color.FromArgb(192, 0, 0, 255))); MixedShades.Add(new SolidColorBrush(Color.FromArgb(192, 255, 0, 0))); ColorList.Add(MixedShades);

_lastGeneratedClassCount = _classCount; }

private void CreateThematicList() { ThematicItemList.Add(new ThematicItem() { Name = "POP2007", Description = "2007 Population ", CalcField = "" }); ThematicItemList.Add(new ThematicItem() { Name = "POP07_SQMI", Description = "2007 Pop per Sq Mi", CalcField = "" }); ThematicItemList.Add(new ThematicItem() { Name = "MALES", Description = "%Males", CalcField = "POP2007" }); ThematicItemList.Add(new ThematicItem() { Name = "FEMALES", Description = "%Females", CalcField = "POP2007" }); ThematicItemList.Add(new ThematicItem() { Name = "MED_AGE", Description = "Median age", CalcField = "" }); ThematicItemList.Add(new ThematicItem() { Name = "SQMI", Description = "Total SqMi", CalcField = "" }); foreach (ThematicItem items in ThematicItemList) { FieldCombo.Items.Add(items.Description); } FieldCombo.SelectedIndex = 0; }

private void SetRangeValues() { GraphicsLayer graphicsLayer = MyMap.Layers["MyGraphicsLayer"] as GraphicsLayer;

// if necessary, update ColorList based on current number of classes. if (_lastGeneratedClassCount != _classCount) CreateColorList();

// Field on which to generate a classification scheme. ThematicItem thematicItem = ThematicItemList[_thematicListIndex];

// Calculate value for classification scheme bool useCalculatedValue = !string.IsNullOrEmpty(thematicItem.CalcField);

// Store a list of values to classify List<double> valueList = new List<double>();

// Get range, min, max, etc. from features for (int i = 0; i < _featureSet.Features.Count; i++) { Graphic graphicFeature = _featureSet.Features[i];

double graphicValue = Convert.ToDouble(graphicFeature.Attributes[thematicItem.Name]); string graphicName = graphicFeature.Attributes["STATE_NAME"].ToString();

if (useCalculatedValue) { double calcVal = Convert.ToDouble(graphicFeature.Attributes[thematicItem.CalcField]); graphicValue = Math.Round(graphicValue / calcVal * 100, 2); }

if (i == 0) { thematicItem.Min = graphicValue; thematicItem.Max = graphicValue; thematicItem.MinName = graphicName; thematicItem.MaxName = graphicName; } else { if (graphicValue < thematicItem.Min) { thematicItem.Min = graphicValue; thematicItem.MinName = graphicName; } if (graphicValue > thematicItem.Max) { thematicItem.Max = graphicValue; thematicItem.MaxName = graphicName; } }

valueList.Add(graphicValue); }

// Set up range start values thematicItem.RangeStarts = new List<double>();

double totalRange = thematicItem.Max - thematicItem.Min; double portion = totalRange / _classCount;

thematicItem.RangeStarts.Add(thematicItem.Min); double startRangeValue = thematicItem.Min;

// Equal Interval if (_classType == 1) { for (int i = 1; i < _classCount; i++) { startRangeValue += portion; thematicItem.RangeStarts.Add(startRangeValue); } } // Quantile else { // Enumerator of all values in ascending order IEnumerable<double> valueEnumerator = from aValue in valueList orderby aValue //"ascending" is default select aValue;

int increment = Convert.ToInt32(Math.Ceiling(_featureSet.Features.Count / _classCount)); for (int i = increment; i < valueList.Count; i += increment) { double value = valueEnumerator.ElementAt(i); thematicItem.RangeStarts.Add(value); } }

// Create graphic features and set symbol using the class range which contains the value List<SolidColorBrush> brushList = ColorList[_colorShadeIndex]; if (_featureSet != null && _featureSet.Features.Count > 0) { // Clear previous graphic features graphicsLayer.Graphics.Clear();

for (int i = 0; i < _featureSet.Features.Count; i++) { Graphic graphicFeature = _featureSet.Features[i];

double graphicValue = Convert.ToDouble(graphicFeature.Attributes[thematicItem.Name]); if (useCalculatedValue) { double calcVal = Convert.ToDouble(graphicFeature.Attributes[thematicItem.CalcField]); graphicValue = Math.Round(graphicValue / calcVal * 100, 2); }

int brushIndex = GetRangeIndex(graphicValue, thematicItem.RangeStarts);

SimpleFillSymbol symbol = new SimpleFillSymbol() { Fill = brushList[brushIndex], BorderBrush = new SolidColorBrush(Colors.Transparent), BorderThickness = 1 };

Graphic graphic = new Graphic(); graphic.Geometry = graphicFeature.Geometry; graphic.Attributes.Add("Name", graphicFeature.Attributes["STATE_NAME"].ToString()); graphic.Attributes.Add("Description", thematicItem.Description); graphic.Attributes.Add("Value", graphicValue.ToString()); graphic.Symbol = symbol;

graphicsLayer.Graphics.Add(graphic); }

// Create new legend with ranges and swatches. LegendStackPanel.Children.Clear();

ListBox legendList = new ListBox(); LegendTitle.Text = thematicItem.Description;

for (int c = 0; c < _classCount; c++) { Rectangle swatchRect = new Rectangle() { Width = 20, Height = 20, Stroke = new SolidColorBrush(Colors.Black), Fill = brushList[c] };

TextBlock classTextBlock = new TextBlock();

// First classification if (c == 0) classTextBlock.Text = String.Format(" Less than {0}", Math.Round(thematicItem.RangeStarts[1], 2)); // Last classification else if (c == _classCount - 1) classTextBlock.Text = String.Format(" {0} and above", Math.Round(thematicItem.RangeStarts[c], 2)); // Middle classifications else classTextBlock.Text = String.Format(" {0} to {1}", Math.Round(thematicItem.RangeStarts[c], 2), Math.Round(thematicItem.RangeStarts[c + 1], 2));

StackPanel classStackPanel = new StackPanel(); classStackPanel.Orientation = Orientation.Horizontal; classStackPanel.Children.Add(swatchRect); classStackPanel.Children.Add(classTextBlock);

legendList.Items.Add(classStackPanel); }

TextBlock minTextBlock = new TextBlock(); StackPanel minStackPanel = new StackPanel(); minStackPanel.Orientation = Orientation.Horizontal; minTextBlock.Text = String.Format("Min: {0} ({1})", thematicItem.Min, thematicItem.MinName); minStackPanel.Children.Add(minTextBlock); legendList.Items.Add(minStackPanel);

TextBlock maxTextBlock = new TextBlock(); StackPanel maxStackPanel = new StackPanel(); maxStackPanel.Orientation = Orientation.Horizontal; maxTextBlock.Text = String.Format("Max: {0} ({1})", thematicItem.Max, thematicItem.MaxName); maxStackPanel.Children.Add(maxTextBlock); legendList.Items.Add(maxStackPanel);

LegendStackPanel.Children.Add(legendList); } }

private int GetRangeIndex(double val, List<double> ranges) { int index = _classCount - 1; for (int r = 0; r < _classCount - 1; r++) { if (val >= ranges[r] && val < ranges[r + 1]) index = r; } return index; }

public struct Values { public string Name { get; set; } public string Description { get; set; } public string Value { get; set; } }

private void ClassTypeCombo_SelectionChanged(object sender, SelectionChangedEventArgs e) { if (ClassTypeCombo != null) _classType = ClassTypeCombo.SelectedIndex; }

private void ColorBlendCombo_SelectionChanged(object sender, SelectionChangedEventArgs e) { if (ColorBlendCombo != null) _colorShadeIndex = ColorBlendCombo.SelectedIndex; }

private void ClassCountCombo_SelectionChanged(object sender, SelectionChangedEventArgs e) { if (ClassCountCombo != null) { ComboBoxItem item = ClassCountCombo.SelectedItem as ComboBoxItem; _classCount = Convert.ToInt32(item.Content); } }

private void FieldCombo_SelectionChanged(object sender, SelectionChangedEventArgs e) { if (FieldCombo != null) _thematicListIndex = FieldCombo.SelectedIndex; }

private void RenderButton_Click(object sender, RoutedEventArgs e) { SetRangeValues(); }

void Triangle_MouseLeftButtonUp(object sender, MouseButtonEventArgs e) { FrameworkElement source = sender as FrameworkElement;

switch (source.Name) { case "ClassExpandedTriangle": case "ClassCollapsedTriangle": if (_classGridCollapsed) { ClassExpandedTriangle.Visibility = Visibility.Visible; ClassCollapsedTriangle.Visibility = Visibility.Collapsed; ClassCollapsedTitle.Visibility = Visibility.Collapsed; ClassGrid.Height = Double.NaN; ClassGrid.UpdateLayout(); } else { ClassCollapsedTriangle.Visibility = Visibility.Visible; ClassExpandedTriangle.Visibility = Visibility.Collapsed; ClassCollapsedTitle.Visibility = Visibility.Visible; ClassGrid.Height = 50; } _classGridCollapsed = !_classGridCollapsed; break; case "LegendExpandedTriangle": case "LegendCollapsedTriangle": if (_legendGridCollapsed) { LegendExpandedTriangle.Visibility = Visibility.Visible; LegendCollapsedTriangle.Visibility = Visibility.Collapsed; LegendCollapsedTitle.Visibility = Visibility.Collapsed; LegendGrid.Height = Double.NaN; LegendGrid.UpdateLayout(); } else { LegendCollapsedTriangle.Visibility = Visibility.Visible; LegendExpandedTriangle.Visibility = Visibility.Collapsed; LegendCollapsedTitle.Visibility = Visibility.Visible; LegendGrid.Height = 50; } _legendGridCollapsed = !_legendGridCollapsed; break; } } } }

渲染 render

标签：

原文地址：http://www.cnblogs.com/aisi-liu/p/4227627.html

踩

(0)

评论一句话评论（0）

分享档案

更多>

2021年07月29日 (22)
2021年07月28日 (40)
2021年07月27日 (32)
2021年07月26日 (79)
2021年07月23日 (29)
2021年07月22日 (30)
2021年07月21日 (42)
2021年07月20日 (16)
2021年07月19日 (90)
2021年07月16日 (35)

周排行