C#+mo implement some rendering functions _c# tutorial

Using System;


Using System.Drawing;


Using System.Collections;


Using System.ComponentModel;


Using System.Windows.Forms;


Using System.Data;


Namespace Dbinmo


{


<summary>


Summary description of the Form1.


</summary>


Public class Rendering Example: System.Windows.Forms.Form


{


Private Axmapobjects2.axmap map;


Private System.Windows.Forms.Button histogram;


Private System.Windows.Forms.Button pie chart;


private System.Windows.Forms.Button point density;


Private System.Windows.Forms.Button are rendered by value;


Private System.Windows.Forms.Button classification rendering;


Private System.Windows.Forms.Button Z-value rendering;


Private System.Windows.Forms.Button group rendering;


Private System.Windows.Forms.Button exit;


Private System.Windows.Forms.Panel Operation board;


Private System.Windows.Forms.Button Delete all rendering;


Private System.Windows.Forms.Panel Panel1;


Private System.Windows.Forms.Button full picture;


Private System.Windows.Forms.Button drag;


Private System.Windows.Forms.Button shrink;


Private System.Windows.Forms.Button amplification;


Private System.Windows.Forms.Panel separator;


private System.Windows.Forms.Button annotation rendering;


<summary>


The required designer variable.


</summary>


Private System.ComponentModel.Container components = null;


Public Render Example ()


{


//


Required for Windows Forms Designer support


//


InitializeComponent ();


//


TODO: Add any constructor code after the InitializeComponent call


//


}


<summary>


Clean up all resources that are in use.


</summary>


protected override void Dispose (bool disposing)


{


if (disposing)


{


if (Components!= null)


{


Components. Dispose ();


}


}


Base. Dispose (disposing);


}


Code generated #region the Windows forms Designer


<summary>


Designer supports required methods-do not use the Code editor to modify


The contents of this method.


</summary>


private void InitializeComponent ()


{


System.Resources.ResourceManager resources = new System.Resources.ResourceManager (typeof (Rendering sample));


This.map = new Axmapobjects2.axmap ();


this. Operator board = new System.Windows.Forms.Panel ();


this. Histogram = new System.Windows.Forms.Button ();


this. Pie chart = new System.Windows.Forms.Button ();


this. Dot density = new System.Windows.Forms.Button ();


this. Render by value = new System.Windows.Forms.Button ();


this. Classification rendering = new System.Windows.Forms.Button ();


This. Z-Value rendering = new System.Windows.Forms.Button ();


this. Group rendering = new System.Windows.Forms.Button ();


this. Exit = new System.Windows.Forms.Button ();


this. Callout rendering = new System.Windows.Forms.Button ();


This. Deletes all render = new System.Windows.Forms.Button ();


This.panel1 = new System.Windows.Forms.Panel ();


this. Whole picture = new System.Windows.Forms.Button ();


this. Drag = new System.Windows.Forms.Button ();


this. Narrows = new System.Windows.Forms.Button ();


this. Enlarge = new System.Windows.Forms.Button ();


this. Separator = new System.Windows.Forms.Panel ();


((System.ComponentModel.ISupportInitialize) (This.map)). BeginInit ();


this. Operation board. SuspendLayout ();


This. SuspendLayout ();


//


Map


//


This.map.Dock = System.Windows.Forms.DockStyle.Fill;


This.map.Location = new System.Drawing.Point (0, 0);


This.map.Name = "Map";


This.map.OcxState = ((System.Windows.Forms.AxHost.State) (resources. GetObject ("map.") OcxState "));


This.map.Size = new System.Drawing.Size (616, 429);


This.map.TabIndex = 0;


This.map.MouseDownEvent + = new Axmapobjects2._dmapevents_mousedowneventhandler (this.map_mousedownevent);


//


Operation Board


//


this. Operation board. BorderStyle = System.Windows.Forms.BorderStyle.Fixed3D;


this. Operator board. Controls.Add (this. Remove all rendering);


this. Operation board. Controls.Add (THIS.PANEL1);


this. Operation board. Controls.Add (this. whole picture);


this. Operator board. Controls.Add (this. drag);


this. Operation board. Controls.Add (this. shrink);


this. Operation board. Controls.Add (this. enlarge);


this. Operator board. Controls.Add (this. separator);


this. Operator board. Controls.Add (this. callout rendering);


this. Operator board. Controls.Add (this. exit);


this. Operation board. Controls.Add (this. Group rendering);


this. Operation board. Controls.Add (this. Z-value rendering);


this. Operation board. Controls.Add (this. classification rendering);


this. Operation board. Controls.Add (this. by value rendering);


this. Operator board. Controls.Add (this. Point density);


this. Operation board. Controls.Add (this. pie chart);


this. Operator board. Controls.Add (this. straight square diagram);


this. Operator board. Dock = System.Windows.Forms.DockStyle.Right;


this. Operation board. Location = new System.Drawing.Point (496, 0);


this. Operator board. Name = "Operation Board";


this. Operator board. Size = new System.Drawing.Size (120, 429);


this. Operation board. TabIndex = 1;


//


Histogram


//


this. Histogram. Dock = System.Windows.Forms.DockStyle.Top;


this. Histogram. Location = new System.Drawing.Point (0, 0);


this. Histogram. Name = "histogram";


this. Histogram. Size = new System.Drawing.Size (116, 24);


this. Histogram. TabIndex = 0;


this. Histogram. Text = "histogram";


this. Histogram. Click + + new System.EventHandler (this. histogram _click);


//


Pie chart


//


this. Pie chart. Dock = System.Windows.Forms.DockStyle.Top;


this. Pie chart. Location = new System.Drawing.Point (0, 24);


this. Pie chart. Name = pie chart;


this. Pie chart. Size = new System.Drawing.Size (116, 24);


this. Pie chart. TabIndex = 1;


this. Pie chart. Text = pie chart;


this. Pie chart. Click + + new System.EventHandler (this. pie chart _click);


//


Point density


//


this. Point density. Dock = System.Windows.Forms.DockStyle.Top;


this. Dot density. Location = new System.Drawing.Point (0, 48);


this. Dot density. Name = "point density";


this. Point density. Size = new System.Drawing.Size (116, 23);


this. Dot density. TabIndex = 2;


this. Dot density. Text = "point density";


this. Dot density. Click + + new System.EventHandler (this. Point density _click);


//


Render by value


//


this. Render by value. Dock = System.Windows.Forms.DockStyle.Top;


this. Render by value. Location = new System.Drawing.Point (0, 71);


this. Render by value. Name = "Render by value";


this. Render by value. Size = new System.Drawing.Size (116, 23);


this. Render by value. TabIndex = 3;


this. Render by value. Text = "Render by value";


this. Render by value. Click + + new System.EventHandler (this. Render _click by value);


//


Classification rendering


//


this. Classification rendering. Dock = System.Windows.Forms.DockStyle.Top;


this. Classification rendering. Location = new System.Drawing.Point (0, 94);


this. Classification rendering. Name = "Classification rendering";


this. Classification rendering. Size = new System.Drawing.Size (116, 23);


this. Classification rendering. TabIndex = 4;


this. Classification rendering. Text = "Classification rendering";


this. Classification rendering. Click + + new System.EventHandler (this. Classification rendering _click);


//


Z-Value Rendering


//


This. Z-value rendering. Dock = System.Windows.Forms.DockStyle.Top;


This. Z-value rendering. Location = new System.Drawing.Point (0, 117);


This. Z-value rendering. Name = "Z-value rendering";


This. Z-value rendering. Size = new System.Drawing.Size (116, 23);


This. Z-value rendering. TabIndex = 5;


This. Z-value rendering. Text = "Z-value rendering";


This. Z-Value Rendering. Click + + new System.EventHandler (this. Z-Value rendering _click);


//


Group rendering


//


this. Group rendering. Dock = System.Windows.Forms.DockStyle.Top;


this. Group rendering. Location = new System.Drawing.Point (0, 140);


this. Group render. Name = "group Render";


this. Group rendering. Size = new System.Drawing.Size (116, 23);


this. Group rendering. TabIndex = 6;


this. Group rendering. Text = "group Rendering";


this. Group rendering. Click + + new System.EventHandler (this. Group renders _click);


//


Exit


//


this. exit. Dock = System.Windows.Forms.DockStyle.Bottom;


this. exit. Location = new System.Drawing.Point (0, 402);


this. exit. Name = "Exit";


this. exit. Size = new System.Drawing.Size (116, 23);


this. exit. TabIndex = 7;


this. exit. Text = "Exit";


this. Exit. Click + + new System.EventHandler (this. exit _click);


//


Callout Rendering


//


this. Callout renders. Dock = System.Windows.Forms.DockStyle.Top;


this. Callout rendering. Location = new System.Drawing.Point (0, 163);


this. Callout rendering. Name = "annotation rendering";


this. Callout rendering. Size = new System.Drawing.Size (116, 23);


this. Callout rendering. TabIndex = 7;


this. Callout renders. Text = "callout Rendering";


this. Callout rendering. Click + + new System.EventHandler (this. Callout renders _click);


//


Remove all rendering


//


this. Deletes all rendering. Dock = System.Windows.Forms.DockStyle.Top;


this. Deletes all rendering. Location = new System.Drawing.Point (0, 319);


This. Deletes all render. Name = "Delete all render";


this. Deletes all rendering. Size = new System.Drawing.Size (116, 23);


this. Deletes all rendering. TabIndex = 22;


This. Deletes all render. Text = "Delete all render";


this. Deletes all rendering. Click + + new System.EventHandler (this. Delete all render _click);


//


Panel1


//


This.panel1.Dock = System.Windows.Forms.DockStyle.Top;


This.panel1.Location = new System.Drawing.Point (0, 299);


This.panel1.Name = "Panel1";


This.panel1.Size = new System.Drawing.Size (116, 20);


This.panel1.TabIndex = 21;


//


Full picture


//


this. Full map. Dock = System.Windows.Forms.DockStyle.Top;


this. Full map. Location = new System.Drawing.Point (0, 276);


this. The whole picture. Name = "full picture";


this. Full map. Size = new System.Drawing.Size (116, 23);


this. Full map. TabIndex = 20;


this. Full picture. Text = "full picture";


this. The full picture. Click + + new System.EventHandler (this. Full picture _click);


//


Drag


//


this. drag. Dock = System.Windows.Forms.DockStyle.Top;


this. drag. Location = new System.Drawing.Point (0, 253);


this. drag. Name = "drag";


this. drag. Size = new System.Drawing.Size (116, 23);


this. drag. TabIndex = 19;


this. drag. Text = "drag";


this. Drag. Click + + new System.EventHandler (this. drag _click);


//


Narrow


//


this. Narrowing. Dock = System.Windows.Forms.DockStyle.Top;


this. Narrowing. Location = new System.Drawing.Point (0, 230);


this. Shrink. Name = "shrink";


this. Shrink. Size = new System.Drawing.Size (116, 23);


this. Shrink. TabIndex = 18;


this. Reduce. Text = "shrink";


this. Zoom out. Click + + new System.EventHandler (this. Shrink _click);


//


Amplification


//


this. Enlarge. Dock = System.Windows.Forms.DockStyle.Top;


this. Enlarge. Location = new System.Drawing.Point (0, 207);


this. Enlarge. Name = "Enlarge";


this. Enlarge. Size = new System.Drawing.Size (116, 23);


this. enlarge. TabIndex = 17;


this. Enlarge. Text = "Enlarge";


this. Zoom in. Click + + new System.EventHandler (this. enlarge _click);


//


Separator


//


this. Separator. Dock = System.Windows.Forms.DockStyle.Top;


this. Separator. Location = new System.Drawing.Point (0, 186);


this. Separator. Name = "Separator";


this. Separator. Size = new System.Drawing.Size (116, 21);


this. Separator. TabIndex = 16;


//


Rendering examples


//


This. AutoScaleBaseSize = new System.Drawing.Size (6, 14);


This. ClientSize = new System.Drawing.Size (616, 429);


This. Controls.Add (this. Operation board);


This. Controls.Add (THIS.MAP);


This. Name = "render Example";


This. Text = "render Example";


This. WindowState = System.Windows.Forms.FormWindowState.Maximized;


((System.ComponentModel.ISupportInitialize) (This.map)). EndInit ();


this. Operation board. ResumeLayout (FALSE);


This. ResumeLayout (FALSE);


}


#endregion


<summary>


The main entry point for the application.


</summary>


[STAThread]


static void Main ()


{


Application.Run (New rendering example ());


}


<summary>


Exit system


</summary>


private void Exit _click (object sender, System.EventArgs e)


{


This. Close ();


}


<summary>


Graph rendering, Value square chart


</summary>


private void histogram _click (object sender, System.EventArgs e)


{


The histogram example uses Lakers layers


//


Define Icon Rendering variables


Mapobjects2.chartrenderer cr = new Mapobjects2.chartrendererclass ();


Set render type to histogram


Cr. ChartType = MapObjects2.ChartTypeConstants.moBar;


Set the histogram to display the number of fields two, is the histogram display two columns


Cr. FieldCount = 2;


To set the first field, see LAKES.DBF


Cr.set_field (0, "Surf_elev");


Set the column color of this histogram to red


Cr.set_color (0, (UINT) MapObjects2.ColorConstants.moRed);


Set a second pillar


Cr.set_field (1, "DEPTH");


Cr.set_color (1, (UINT) MapObjects2.ColorConstants.moGreen);


Mapobjects2.maplayer Lyr = (mapobjects2.maplayer) (map. Layers.item ("Lakes"));


Lyr. Renderer = CR;


Refresh by using refresh () The old is also refreshing bad, is no way ... It's a good idea to set the whole picture, ^_^


Map. Refresh ();


}


<summary>


Full picture view


</summary>


private void Full map _click (object sender, System.EventArgs e)


{


Map. Extent = map. Fullextent;


}


<summary>


Drag, set icon only


</summary>


private void drag _click (object sender, System.EventArgs e)


{


Map. MousePointer = MapObjects2.MousePointerConstants.moPan;


}


<summary>


Zoom out, just set the icon


</summary>


private void narrowing _click (object sender, System.EventArgs e)


{


Map. MousePointer = MapObjects2.MousePointerConstants.moZoomOut;


}


<summary>


Zoom in, just set the icon


</summary>


private void magnification _click (object sender, System.EventArgs e)


{


Map. MousePointer = MapObjects2.MousePointerConstants.moZoomIn;


}


<summary>


The mouse presses the time, handles the map to enlarge, reduces, drags and so on.


</summary>


private void Map_mousedownevent (object sender, Axmapobjects2._dmapevents_mousedownevent e)


{


Mapobjects2.rectangle rect;


Mapobjects2.point pt = map. Tomappoint (E.X,E.Y);


if (E.button = = 2)//right-click Cancel


{


Map. MousePointer = MapObjects2.MousePointerConstants.moDefault;


}


if (map. MousePointer = = MapObjects2.MousePointerConstants.moPan)//drag


{


Map. Pan ();


}


else if (map. MousePointer = = MapObjects2.MousePointerConstants.moZoomIn)/enlarge


{


Rect = map. Trackrectangle ();


if (rect = = null| | (Rect. Width < 0.00005) | | (Rect. Height < 0.00005))


{


Rect = map. Extent;


Rect. Scalerectangle (0.6667);


Rect. Offset (-(RECT). Center.x-pt. X),-(rect. Center.y-pt. Y));


}


Map. Extent = rect;


}


else if (map. MousePointer = = MapObjects2.MousePointerConstants.moZoomOut)/Shrink


{


Rect = map. Trackrectangle ();


if (null = rect) | | (Rect. Width < 0.00005) | | (Rect. Height < 0.00005))


{


Rect = map. Extent;


Rect. Scalerectangle (1.5);


Rect. Offset (-(RECT). Center.x-pt. X),-(rect. Center.y-pt. Y));


}


Else


{


Double drate = map. Extent.width/rect. Width * 10;


Rect. Scalerectangle (drate);


}


Map. Extent = rect;


}


}


<summary>


Graph rendering, using pie charts


</summary>


private void Pie chart _click (object sender, System.EventArgs e)


{


Use Lakers layer in the example of pie chart


The procedure is the same as the histogram


//


Define Icon Rendering variables


Mapobjects2.chartrenderer cr = new Mapobjects2.chartrendererclass ();


To set a render type as a pie chart


Cr. ChartType = MapObjects2.ChartTypeConstants.moPie;


Set the pie chart to display a number of two fields, which is a pie chart showing two halves


Cr. FieldCount = 2;


To set the first field, see LAKES.DBF


Cr.set_field (0, "Surf_elev");


Set half the color of this pie chart to red


Cr.set_color (0, (UINT) MapObjects2.ColorConstants.moRed);


Set second half


Cr.set_field (1, "DEPTH");


Cr.set_color (1, (UINT) MapObjects2.ColorConstants.moGreen);


Add to map


Mapobjects2.maplayer Lyr = (mapobjects2.maplayer) (map. Layers.item ("Lakes"));


Lyr. Renderer = CR;


Refresh


Map. Refresh ();


}


<summary>


Dot Density rendering


</summary>


private void point density _click (object sender, System.EventArgs e)


{


Use lakes layer in the example of dot density


//


Define point density rendering variables


Mapobjects2.dotdensityrenderer DDR = new Mapobjects2.dotdensityrendererclass ();


To set the rendered data field, see LAKES.DBF


Ddr. Field = "DEPTH";


Point size


Ddr. Dotsize = 3;


Dot Color


Ddr. Dotcolor = (UINT) MapObjects2.ColorConstants.moBlue;


Ddr. Dotvalue = 1;


Ddr. Drawbackground = true;


Add to map


Mapobjects2.maplayer Lyr = (mapobjects2.maplayer) (map. Layers.item ("Lakes"));


Lyr. Renderer = DDR;


Refresh


Map. Refresh ();


}


<summary>


Render by value


</summary>


private void renders _click by value (object sender, System.EventArgs e)


{


The country layer is used in the example of value rendering, where each country is displayed in a different color using a value rendering


//


The string s variable, much like the Tstringlist in Delphi, ^_^


Mapobjects2.strings STRs = new Mapobjects2.stringsclass ();


Layer variables, referencing country layers


Mapobjects2.maplayer Lyr = (mapobjects2.maplayer) map. Layers.item ("Country");


Recordset object, which I will explain in future articles about using dataset variables in MapObjects2.2!!!


The usage method is roughly similar to the operation of the data table in VB.


Mapobjects2.recordset rc = Lyr. Records;


This loop gets the abbreviation code list for all countries


while (!RC. EOF)


{


STRs. ADD (RC. Fields.item ("Fips_code"). valueasstring);


Rc. MoveNext ();


}


Define object-by-value rendering


Mapobjects2.valuemaprenderer VMR = new Mapobjects2.valuemaprendererclass ();


Add it to a layer


Lyr. Renderer = VMR;


To set the fields used for rendering, see COUNTRY.DBF file


Vmr. Field = "Fips_code";


Number of renders


Vmr. Valuecount = STRs. Count;


Default value


Vmr. Usedefault = true;


Mapobjects2.symbol sym = VMR. Defaultsymbol;


Sym. color = (UINT) mapobjects2.colorconstants.moyellow;//default color is yellow


Rendering process


for (int I=0;I<VMR. valuecount;i++)


{


Vmr.set_value (short) i,strs. Item ((short) i));


}


Refresh


Map. Refresh ();


}


<summary>


Classification rendering


</summary>


private void Category render _click (object sender, System.EventArgs e)


{


Examples of category rendering using country layers


//


Layer Variable Reference Cities layer


Mapobjects2.maplayer Lyr = (mapobjects2.maplayer) (map. Layers.item ("Cities"));


Define a category render variable


Mapobjects2.classbreaksrenderer CBR = new Mapobjects2.classbreaksrendererclass ();


Add to map


Lyr. Renderer = CBR;


To set the symbol type to point or other type, try it yourself, probably all the same.


Cbr. Symboltype = MapObjects2.SymbolTypeConstants.moPointSymbol;


To set a field, see CITIES.DBF file


Cbr. Field = "POPULATION";


Statistics objects are often used in conjunction with category rendering, he says, using a Calculatestatistics method of a Recordset object


Statistical calculation of a numeric field


Mapobjects2.statistics stat = Lyr. Records.calculatestatistics ("POPULATION");


mean--mean, stddev--mean variance


Double FBV = Stat. Mean-(Stat. StdDev * 3);


for (int i=0;i<6;i++)


{


if (FBV >= Stat. Min) &&FBV <= Stat. MAX)


{


The number of categories, in turn, add a


Cbr. Breakcount = (short) (CBR. Breakcount + 1);


Set up Categories


Cbr.set_break (short) (CBR. BreakCount-1), FBV);


}


FBV + = Stat. StdDev;


}


Sizesymbols method to set the size of the tail to show the point feature size progressive effect


Cbr. Sizesymbols (3,8);


Rampcolors method sets the progressive display of colors from white to red


Cbr. Rampcolors ((UINT) MapObjects2.ColorConstants.moWhite, (UINT) MapObjects2.ColorConstants.moRed);


Refresh


Map. Refresh ();


}


<summary>


Z-Value Rendering


</summary>


private void Z-Value rendering _click (object sender, System.EventArgs e)


{


Originally wanted to do a good job, but I can not find a map with z value, haha, recognized it, the following gives the basic statement, interested in


Brothers and sisters, they can try it on their own.


Mapobjects2.zrenderer ZR = new Mapobjects2.zrendererclass ();


What is the z value divided into several parts?


Zr. Breakcount = 2;


Set the boundaries of each section


Zr.set_break (0,100);


Zr.set_break (1,1000);


Set feature types


Zr. Symboltype = MapObjects2.SymbolTypeConstants.moPointSymbol;


Mapobjects2.symbol sym;


for (short I=0;I<ZR. breakcount;i++)


//            {


Get features


Sym = Zr.get_symbol (i);


Setting a feature property, defining an array of colors, and setting different colors differently will make the effect more obvious.


Sym. Color = (UINT) MapObjects2.ColorConstants.moRed;


Sym. Size = 6;


Sym. Style = MapObjects2.MarkerStyleConstants.moTriangleMarker;


//            }


Add to map


Mapobjects2.maplayer Lyr = (mapobjects2.maplayer) map. Layers.item ("Layer name with Z value");


Lyr. Renderer = ZR;


Refresh


Map. Refresh ();


}


<summary>


Group rendering


</summary>


private void group render _click (object sender, System.EventArgs e)


{


Group rendering is actually a combination of rendering, generally define multiple rendering methods, and then use the following statements to combine


Mapobjects2.maplayer Lyr = (mapobjects2.maplayer) map. Layers.item ("Country");


Callout Rendering


Mapobjects2.labelrenderer lr = new Mapobjects2.labelrendererclass ();


Lr. Field = "NAME";


Lr.get_symbol (0). Color = (UINT) MapObjects2.ColorConstants.moBlack;


Lr.get_symbol (0). Font.Size = 8;


Render by value


Mapobjects2.strings STRs = new Mapobjects2.stringsclass ();


Mapobjects2.recordset rc = Lyr. Records;


while (!RC. EOF)


{


STRs. ADD (RC. Fields.item ("Fips_code"). valueasstring);


Rc. MoveNext ();


}


Mapobjects2.valuemaprenderer VMR = new Mapobjects2.valuemaprendererclass ();


Vmr. Field = "Fips_code";


Vmr. Valuecount = STRs. Count;


Vmr. Usedefault = true;


Mapobjects2.symbol sym = VMR. Defaultsymbol;


Sym. Color = (UINT) MapObjects2.ColorConstants.moYellow;


for (int I=0;I<VMR. valuecount;i++)


{


Vmr.set_value (short) i,strs. Item ((short) i));


}


Combine the two to add to the layer


Mapobjects2.grouprenderer gr = new Mapobjects2.grouprendererclass ();


Gr. ADD (VMR);


Gr. ADD (LR);


Lyr. Renderer = gr;


Map. Refresh ();


}


<summary>


Remove all rendering


</summary>


private void Deletes all render _click (object sender, System.EventArgs e)


{


Mapobjects2.maplayer Lyr;


for (int i=0;i<map. layers.count;i++)


{


LYR = (mapobjects2.maplayer) map. Layers.item (i);


Lyr. Renderer = new Mapobjects2.labelrendererclass ();


Map. Refresh ();


}


}


<summary>


Callout Rendering


</summary>


private void Callout Render _click (object sender, System.EventArgs e)


{


Mapobjects2.maplayer Lyr = (mapobjects2.maplayer) map. Layers.item ("Cities");


Mapobjects2.labelrenderer lr = new Mapobjects2.labelrendererclass ();


Lr. Field = "NAME";


Lr.get_symbol (0). Color = (UINT) MapObjects2.ColorConstants.moBlack;


Lr.get_symbol (0). Font.Size = 8;


Lyr. Renderer = LR;


Map. Refresh ();


}


}


}