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| unit Thematic;
interface
uses
Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs,
StdCtrls, OleCtrls, ComObj, DBCtrls, Sample, ActiveX, MapObjects2_TLB;
type
TForm1 = class(TForm)
Button1: TButton;
Button2: TButton;
Button3: TButton;
Button4: TButton;
Button5: TButton;
Button6: TButton;
Button7: TButton;
Button8: TButton;
Map1: TMap;
procedure Map1MouseDown(Sender: TObject; Button: TMouseButton;
Shift: TShiftState; X, Y: Integer);
procedure Button1Click(Sender: TObject);
procedure Button2Click(Sender: TObject);
procedure Button3Click(Sender: TObject);
procedure Button4Click(Sender: TObject);
procedure Button7Click(Sender: TObject);
procedure Button8Click(Sender: TObject);
procedure Button5Click(Sender: TObject);
procedure Button6Click(Sender: TObject);
procedure FormShow(Sender: TObject);
private
{ Private declarations }
public
{ Public declarations }
end;
var
Form1: TForm1;
Font: TFont;
Sampl :TSample;
implementation
{$R *.DFM}
{*****************************************************************************}
procedure TForm1.Map1MouseDown(Sender: TObject; Button: TMouseButton;
Shift: TShiftState; X, Y: Integer);
var
r :IMoRectangle;
begin
if button = mbleft then
// zoom in
begin
r :=map1.TrackRectangle;
if varisempty (r) :=false then
map1.extent :=r;
end
else
begin
// zoom out
r :=map1.extent;
r.ScaleRectangle(variant(1.5));
map1.extent :=r;
end
end;
{*****************************************************************************}
procedure TForm1.Button1Click(Sender: TObject);
var
r : variant;
lyrs : IMoLayers;
lyr : IMoMapLayer;
begin
lyr := IMoMapLayer(CreateOleObject('MapObjects2.MapLayer'));
lyrs := IMoLayers(map1.Layers);
lyr := IMoMapLayer(lyrs.Item('NeCenter'));
lyr.Visible := False; //hide NeCenter
lyr := IMoMapLayer(lyrs.item('counties'));
if not varisempty(lyr.Renderer) then
begin
//Make a null Dispatch object (A null object)
TVarData(r).VType := varDispatch;
lyr.renderer := IDispatch(r);
end;
map1.refresh;
end;
{*****************************************************************************}
procedure TForm1.Button2Click(Sender: TObject);
var
stats : IMoStatistics;
r : IMoDotDensityRenderer;
lyrs : IMoLayers;
lyr : IMoMapLayer;
rc : IMoRecordset;
begin
lyrs := IMoLayers(map1.layers);
lyr := IMoMapLayer(CreateOleObject('MapObjects2.MapLayer'));
lyr := IMoMapLayer(lyrs.item('neCenter'));
lyr.visible :=False; //hide NeCenter
r := IMoDotDensityRenderer(CreateOleObject('MapObjects2.DotDensityRenderer'));
r.field := 'HBEDS_1000';
lyr := IMoMapLayer(lyrs.item('counties'));
lyr.renderer := r;
// set dot value
rc := IMoRecordset(lyr.records);
stats := IMoStatistics(rc.calculateStatistics('HBEDS_1000'));
r.DotValue :=(Stats.Min + (Stats.Max - stats.Min)/2)/20;
map1.refresh;
end;
{*****************************************************************************}
procedure TForm1.Button3Click(Sender: TObject);
var
strings : IMoStrings;
ly : IMoMapLayer;
recs : IMoRecordset;
s : String;
i : integer;
lyr : IMoMapLayer;
lyrs : IMoLayers;
flds : IMoFields;
fld : IMoField;
ren : IMoValueMapRenderer;
begin
lyrs := IMoLayers(map1.layers);
lyr := IMoMapLayer(CreateOleObject('MapObjects2.MapLayer'));
lyr := IMoMapLayer(lyrs.item('neCenter'));
lyr.visible := false; //hide Necenter
// find unique values for STATE_NAME field
strings := IMoStrings(CreateOleObject('MapObjects2.Strings'));
ly := IMoMapLayer(CreateOleObject('MapObjects2.MapLayer'));
ly := IMoMapLayer(lyrs.item('counties'));
recs := IMoRecordset(ly.records);
while not recs.eof do
begin
flds := IMoFields(recs.fields);
fld := IMoField(flds.item('STATE_NAME'));
s := fld.value;
strings.add(s);
recs.movenext;
{flds := UnAssigned;
fld := UnAssigned;
s := UnAssigned;}
end;
ren := IMoValueMapRenderer(CreateOleObject('MapObjects2.ValueMapRenderer'));
ren.Field :='STATE_NAME';
// add the unique values to the renderer
ren.ValueCount :=strings.count;
for i :=0 to Strings.Count-1 do
ren.value[i]:= strings.Item (i);
ly.renderer := ren;
Map1.Refresh;
end;
{*****************************************************************************}
procedure TForm1.Button4Click(Sender: TObject);
var
breakval : double;
r : IMoClassBreaksRenderer;
stats : IMoStatistics;
i : integer;
lyrs : IMoLayers;
lyr : IMoMapLayer;
rc : IMoRecordset;
begin
lyrs := IMoLayers(map1.layers);
lyr := IMoMapLayer(CreateOleObject('MapObjects2.MapLayer'));
lyr := IMoMapLayer(lyrs.item('neCenter'));
lyr.visible := false; //hide Necenter
r := IMoClassBreaksRenderer(CreateOleObject('MapObjects2.ClassBreaksRenderer'));
lyr := IMoMapLayer(lyrs.item('Counties'));
lyr.renderer := r;
r.field :='P_OTHER';
rc := IMoRecordset(lyr.records);
stats := IMoStatistics(rc.CalculateStatistics('P_OTHER'));
//calculate breaks away from mean in both directions
//but only add thoses brealks that are within the range of values
breakVal := stats.Mean -(stats.StdDev *3);
for i := 0 to 6 do
begin
if (BreakVal >=stats.Min) and (breakVal <=stats.Max) then
begin
r.breakCount := r.BreakCount +1;
r.Break[r.BreakCount -1] := breakVal;
end;
breakVal :=breakVal + stats.StdDev;
end;
//create a color ramp
r.RampColors(8454143,$FF0000);
map1.refresh;
end;
{*****************************************************************************}
procedure TForm1.Button7Click(Sender: TObject);
var
ly : IMoMapLayer;
lblren : IMoLabelPlacer;
lyrs : Layers;
ft : TFont;
oleFt : variant;
begin
ft := TFont.Create;
ft.name := 'Times New Roman';
ft.size := 35;
oleFt := FontToOleFont(ft);
font.name :='Times';
lyrs := IMoLayers(map1.layers);
ly := IMoMapLayer(CreateOleObject('MapObjects2.MapLayer'));
ly := IMoMapLayer(lyrs.item('NeCenter'));
ly.visible := false;
lblren := IMoLabelPlacer(CreateOleObject('MapObjects2.LabelPlacer'));
lblren.defaultsymbol.height := 10000; //map1.extent.height/50;
lblren.field :='cnty_name';
lblren.defaultsymbol.font := IFontDisp(IDispatch(oleFt));
lblren.AllowDuplicates :=false;
ly := IMoMapLayer(lyrs.item('Counties'));
ly.renderer := lblren;
map1.refresh;
ft.Free;
end;
{*****************************************************************************}
procedure TForm1.Button8Click(Sender: TObject);
begin
map1.extent :=map1.fullextent;
end;
{*****************************************************************************}
procedure TForm1.Button5Click(Sender: TObject);
var
j,i : integer;
count : real;
ly : IMoMapLayer;
nrecs,nClasses :integer;
recs : IMoRecordset;
lyrs : IMoLayers;
lyr : IMoMapLayer;
ren : IMoClassBreaksRenderer;
fld : IMoField;
flds : IMoFields;
d : double;
cnt : integer;
begin
lyrs := IMoLayers(map1.layers);
lyr := IMoMapLayer(CreateOleObject('MapObjects2.MapLayer'));
lyr := IMoMapLayer(lyrs.item('neCenter'));
lyr.visible := false; //hide Necenter
ly := IMoMapLayer(CreateOleObject('MapObjects2.MapLayer'));
ly := IMoMapLayer(lyrs.item('Counties'));
ren := IMoClassBreaksRenderer(CreateOleObject('MapObjects2.ClassBreaksRenderer'));
nClasses :=5;
recs := IMoRecordset(ly.records);
nRecs := recs.count;
ren.BreakCount :=nClasses -1;
ren.Field :='P_OTHER';
//query all the features and order the results
recs := IMoRecordset(ly.SearchExpression('FeatureId > -1 order by P_OTHER'));
//navigate the record set and set up the breaks
flds := IMoFields(recs.fields);
fld := IMoField(flds.item('P_OTHER'));
cnt := ren.BreakCount - 1;
for i :=0 to cnt do
begin
count := nrecs/nclasses;
for j := 1 to Round(nrecs/nclasses) do
begin
recs.MoveNext;
end;
d := fld.value;
ren.Break[i] := d;
end;
//create a color ramp
ren.rampcolors(8454143,$FF0000);
ly.renderer := ren;
map1.refresh;
end;
{*****************************************************************************}
procedure TForm1.Button6Click(Sender: TObject);
var
i : integer;
r : IMoClassBreaksRenderer;
breakVal : double;
recs : IMoRecordset;
ly : IMoMapLayer;
stats : IMoStatistics;
lyrs : IMoLayers;
lyr : IMoMapLayer;
sym : IMoSymbol;
begin
lyrs := IMoLayers(map1.layers);
ly:= IMoMapLayer(CreateOleObject('MapObjects2.MapLayer'));
ly := IMoMapLayer(lyrs.item('neCenter'));
ly.visible :=true;
lyr:= IMoMapLayer(CreateOleObject('MapObjects2.MapLayer'));
lyr := IMoMapLayer(lyrs.item('counties'));
//TVarData(r).VType := varDispatch;
lyr.renderer := Nil;
r := IMoClassBreaksRenderer(CreateOleObject('MapObjects2.ClassbreaksRenderer'));
r.field :='P_OTHER';
sym := IMoSymbol(ly.symbol);
r.SymbolType := sym.SymbolType;
ly.renderer := r;
recs := IMoRecordset(ly.records);
stats := IMoStatistics(recs.CalculateStatistics('P_OTHER'));
//calculate breaks away from the mean in both the directions
//but only add those breaks that are within the range of values
breakVal :=stats.Mean -(stats.StdDev *3);
for i :=0 to 6 do
begin
if (breakVal >=stats.Min) and (breakVal<=stats.max) then
begin
r.BreakCount := r.BreakCount +1;
r.Break[r.BreakCount -1] := breakVal;
end;
breakVal :=breakVal +stats.StdDev;
end;
//created graduated symbols of the same color
r.SizeSymbols(3,8);
for i := 0 to r.BreakCount do
begin
sym := IMoSymbol(r.symbol[i]);
sym.color := $FF;
//sym := unassigned;
end;
map1.refresh;
end;
{*****************************************************************************}
procedure TForm1.FormShow(Sender: TObject);
var
dc : IMoDataConnection;
layer : IMoMapLayer;
begin
dc := IMoDataConnection(CreateOleObject('MapObjects2.DataConnection'));
dc.Database := Sampl.ReturnDataPath('Northeast');
if not dc.Connect then exit;
layer := IMoMapLayer(CreateOleObject('MapObjects2.MapLayer'));
layer.GeoDataset := dc.FindGeoDataSet('counties');
layer.Symbol.Color := 13697023;
Map1.Layers.Add(Layer);
layer := IMoMapLayer(CreateOleObject('MapObjects2.MapLayer'));
layer.GeoDataset :=dc.FindGeoDataSet('Necenter');
layer.visible :=False;
Map1.Layers.Add(Layer);
end;
end. |
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