?? mapxapis.pas

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unit MapXAPIs;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms, 
  Dialogs, MapXLib_TLB, OleCtrls, MapXBase, Registry, DB, ADODB, DBTools;

//-------------------------------------------------------------------------//
//                             視圖顯示　　　　　　　　　　　　　　　　　  //
//-------------------------------------------------------------------------//
procedure GoToFeature(MapX:TMapXObject; ft:Feature; bFill:Boolean;
  Seed:Double);
procedure GoToFeatures(MapX:TMapXObject; fts:Features; bFill:Boolean;
  Seed:Double);
procedure GoToSelection(MapX:TMapXObject; st:Selection);
procedure GoToLayers(MapX:TMapXObject);
procedure GoToLayer(MapX:TMapXObject; Lyr:Layer);
//-------------------------------------------------------------------------//
//                             圖層設置　　　　　　　　　　　　　　　　　  //
//-------------------------------------------------------------------------//
//檢測圖層編輯狀態//
procedure CheckLayerModifyState(ALyr:Layer);
//取得圖層索引號//
function GetLayerIndex(MapX:TMapXObject; ALyr:Layer):Integer; overload;
//用圖層名稱取得索引號
function GetLayerIndex(MapX:TMapXObject; LayerName:string):Integer; overload;
//圖層是否存在//
function LayerExists(MapX:TMapXObject; const LayerName:string):Boolean;
//-------------------------------------------------------------------------//
//                             選擇管理　　　　　　　　　　　　　　　　　  //
//-------------------------------------------------------------------------//
//判斷圖形是否被選擇//
function FeatureSelected(ft:Feature):Boolean;
//圖層圖形全部選擇//
procedure SelectAll(MapX:TMapXObject; ALyr:Layer; const bAutoRefresh:Boolean=True); overload;
//地圖圖形全部選擇//
procedure SelectAll(MapX:TMapXObject; const bAutoRefresh:Boolean=True); overload;
//選擇圖形集合//
procedure SelectFeatures(MapX:TMapXObject; ALyr:Layer; Fts:Features;
  const bAutoRefresh:Boolean=True);
//選擇圖形//
procedure SelectFeature(MapX:TMapXObject; Ft:Feature; const bAutoRefresh:Boolean=True);
//圖層圖形反選//
procedure InvertSelection(MapX:TMapXObject; ALyr:Layer; const bAutoRefresh:Boolean=True); overload;
//地圖圖形反選//
procedure InvertSelection(MapX:TMapXObject; const bAutoRefresh:Boolean=True); overload;
//圖層取消選擇//
procedure ClearSelection(MapX:TMapXObject; ALyr:Layer; const bAutoRefresh:Boolean=True); overload;
//地圖取消選擇//
procedure ClearSelection(MapX:TMapXObject; const bAutoRefresh:Boolean=True); overload;
//-------------------------------------------------------------------------//
//                             圖形管理　　　　　　　　　　　　　　　　　  //
//-------------------------------------------------------------------------//
//平移圖形//
//procedure OffestFeatures(fts:Features);
//刪除所有圖形//
procedure DeleteAllShapes(MapX:TMapXObject; ALyr:Layer; const bAutoRefresh:Boolean=True);
//是否可以增加點//
function ShapeCanAddPoint(Ft:Feature; PartIndex:Integer):Boolean;
//是否可是刪除點//
function ShapeCanDeletePoint(Ft:Feature; PartIndex:Integer):Boolean;
//是否可以編輯點//
function ShapeCanEditPoint(Ft:Feature; PartIndex:Integer):Boolean;
//取得點//
function GetShapePoint(Ft:Feature; const PartIndex, PointIndex:Integer):Point;
//在Selction取得第一個指定類型的圖元//
function GetFirstShapeInSelction(ASelection:Selection; const ShapeType:Integer):Feature;
//左對齊//
procedure AlignLeft(ASelection:Selection);
//右齊//
procedure AlignRight(ASelection:Selection);
//上齊//
procedure AlignTop(ASelection:Selection);
//下齊//
procedure AlignBottom(ASelection:Selection);
//居中齊//
procedure AlignCenter_X(ASelection:Selection);
procedure AlignCenter_Y(ASelection:Selection);
//平移//
procedure OffestShapes(ASelection:Selection; const dx, dy:Double);
//增加圖形//
function AddCopyFeature(ToLayer:Layer; Ft:Feature; ds:CMapXDataSet;
  const bAddData:Boolean):Feature;
//-------------------------------------------------------------------------//
//                             樣式設置　　　　　　　　　　　　　　　　    //
//-------------------------------------------------------------------------//
//設置樣式//
function PickStyle(mstyle:OleVariant; const pm:TPickMethod):Boolean;
//設置地圖樣式//
function EditMapStyle(MapX:TMapXObject; const pm:TPickMethod;
  const bEffectAllLayers, bEffectAllFeatures:Boolean):Boolean;
//設置圖層樣式//
function EditLayerStyle(Lyr:Layer; const pm:TPickMethod;
  const bEffectAllFeatures:Boolean):Boolean;
//取得圖形的PickMethod//
function GetFeaturePickMethod(ft:Feature):TPickMethod;
//把樣式具體到每一個圖元//
function EditFeatureStyle(ft:Feature):Boolean;
//自定義符號//
procedure LoadSymbolBitmap(const SourceFile, SymbolPath:string);
procedure LoadSymbolBitmaps(Files:TStrings; SymbolPath:string); overload;
procedure LoadSymbolBitmaps(UserPath:string; const ForceCopy:Boolean); overload;
//符號是否存在//
function SymbolBitmapExists(SymbolPath, SymbolName:string):Boolean;
//從線樣式獲取多邊形線樣式//
procedure ConfigLineStyleFromRegionStyle(ToStyle, FromStyle:Style);
//從多邊形線樣式獲取線樣式//
procedure ConfigRegionStyleFromLineStyle(ToStyle, FromStyle:Style);
//-------------------------------------------------------------------------//
//                             GeoDictionary 　　　　　　　　　　　　　　  //
//-------------------------------------------------------------------------//
//取得MapX路徑//
function GetMapXPath:string;
//取得MapX圖標路徑//
function GetMapXBitmapPath:string;
//GeoDictionary，用于定位.DCT文件//
function GetGeoDictionaryFile:string;
function SetGeoDictionaryFile(const FileName:string):Boolean;
//SearchPaths，其值是缺省的數據目錄，用于定位.GST文件或.TAB文件，可以是多個目錄，之間用逗號隔開//
function GetGeoDictionaryFileSearchPath(List:TStrings):Boolean;
function SetGeoDictionaryFileSearchPath(List:TStrings):Boolean;
//-------------------------------------------------------------------------//
//                             結果集管理  　　　　　　　　　　　　　　　  //
//-------------------------------------------------------------------------//
function ToComFieldType(Value: TMapFieldType):Integer;
function ToMapFieldType(Value: Integer):TMapFieldType; overload;
function ToMapFieldType(Value: TDataType):TMapFieldType; overload;
procedure InitRowValuesFromStruct(Rvs:CMapXRowValues; FromFields:CMapXFields;
  ToDs:CMapXDataset);
function CreateRowValuesFromStruct(FromFields:CMapXFields;
  ToDs:CMapXDataset):CMapXRowValues;
function GetFeatureRowValues(Ft:Feature; ds:CMapXDataset):CMapXRowValues;
procedure InitRowValuesFromDataSet(rvs: TMapRowValueList; Fds:CMapXFields); overload;
procedure InitRowValuesFromDataSet(rvs: TMapRowValueList; RomateDS: TADOQuery); overload;
procedure LoadMapFields(Fds:CMapXFields; MapFields: TMapFieldList); overload;
procedure LoadMapFields(RomateDS: TADOQuery; MapFields: TMapFieldList); overload;
procedure CreateRomateTable(RomateDS: TADOQuery; const ADBType:TDBType;
  const TableName: string; MapFields: TMapFieldList);
//-------------------------------------------------------------------------//
//                             圖形編輯　　　　　　　　　　　　　　　　　  //
//-------------------------------------------------------------------------//
//取得圖形類型//
procedure GetShapeTypes(Fts:Features; List:TStrings);
//是否可以轉換為線//
function CanRegionToLine(Fts:Features):Boolean;
//判斷圖形是否可以合并//
function CanCombine(Fts:Features):Boolean;
//合并圖形，如果是多邊形和線，則自動轉化為線//
function CombineSelectedShapes(MapX:TMapXObject; ALyr:Layer):Feature;
//取得最近的點//
function GetNearestLine(Ft:Feature; const mX, mY, mW: Double; var PartIndex,
  PointIndex:Integer; var pt0:TAny2DPoint):Boolean;
//-------------------------------------------------------------------------//
//                             雜項設置　　　　　　　　　　　　　　　　　  //
//-------------------------------------------------------------------------//
function GetMethodGlobalAddress(Obj: TObject; const MethodName:string;
  var PMethod:TMethod):Boolean;

  
implementation

uses
  BusinessDialogs, WinFileSystem, StringOperations;

procedure GoToFeature(MapX:TMapXObject; ft:Feature; bFill:Boolean;
  Seed:Double);
var
  OldAutoRedraw:Boolean;
  Rect:CMapXRectangle;
begin
  if bFill then
  begin
    Rect:=CoRectangle.Create;
    case ft.type_ of
      miFeatureTypeSymbol:
        Rect.Set_(ft.Point.X-Seed, ft.Point.Y-Seed, ft.Point.X+Seed, ft.Point.Y+Seed);
      miFeatureTypeRegion,
      miFeatureTypeLine,
      miFeatureTypeText,
      miFeatureTypeMixed,
      miFeatureTypeMultipoint:begin
        Rect:=ft.Bounds;
        Rect.Set_(Rect.XMin-Seed, Rect.YMin-Seed, Rect.XMax+Seed, Rect.YMax+Seed);
      end;
    end;
    MapX.Bounds:=Rect;
  end
  else begin
    OldAutoRedraw:=MapX.AutoRedraw;
    try
      MapX.AutoRedraw := False;
      MapX.CenterX := ft.CenterX;
      MapX.CenterY := ft.CenterY;
    finally
      MapX.AutoRedraw := OldAutoRedraw;
      MapX.Refresh;
    end;
  end;
end;

procedure GoToFeatures(MapX:TMapXObject; fts:Features; bFill:Boolean;
  Seed:Double);
begin
  if fts.Count=1 then
    GoToFeature(MapX, fts.Item[1], True, Seed)
  else
    MapX.Bounds:=fts.Bounds;
end;

procedure GoToSelection(MapX:TMapXObject; st:Selection);
begin
  MapX.Bounds:=st.Bounds;
end;

procedure GoToLayers(MapX:TMapXObject);
begin
  MapX.Bounds := MapX.Layers.Bounds;
end;

procedure GoToLayer(MapX:TMapXObject; Lyr:Layer);
begin
  MapX.Bounds:=Lyr.Bounds;
end;

procedure CheckLayerModifyState(ALyr:Layer);
begin
  if ALyr=nil then
    WarningAbort('提示', '請選擇要編輯的圖層！');
  if not ALyr.Editable then
    WarningAbort('提示', '請設置圖層為編輯狀態！');
end;

function GetLayerIndex(MapX:TMapXObject; ALyr:Layer):Integer;
var
  i:Integer;
begin
  Result:=-1;
  for i:=1 to MapX.Layers.Count do
    if MapX.Layers.Item[i]=ALyr then
    begin
      Result:=i;
      Exit;
    end;
end;

function GetLayerIndex(MapX:TMapXObject; LayerName:string):Integer;
var
  i:Integer;
begin
  Result:=-1;
  for i:=1 to MapX.Layers.Count do
    if AnsiCompareText(MapX.Layers.Item[i].Name, LayerName)=0 then
    begin
      Result:=i;
      Exit;
    end;
end;

function LayerExists(MapX:TMapXObject; const LayerName:string):Boolean;
begin
  Result:=GetLayerIndex(MapX, LayerName)<>-1;
end;

function FeatureSelected(ft:Feature):Boolean;
var
  i:Integer;
  ALyr:Layer;
begin
  Result:=False;
  ALyr:=ft.Layer;
  for i:=1 to ALyr.Selection.Count do
    if ALyr.Selection.Item[i]=ft then
    begin
      Result:=True;
      Break;
    end;
end;

procedure SelectAll(MapX:TMapXObject; ALyr:Layer; const bAutoRefresh:Boolean);
var
  OldAutoRedraw:Boolean;
begin
  OldAutoRedraw:=MapX.AutoRedraw;
  if bAutoRefresh then
    MapX.AutoRedraw := False;
  ALyr.Selection.SelectAll(miSelectionNew);
  if bAutoRefresh then
  begin
    MapX.AutoRedraw := OldAutoRedraw;
    MapX.Refresh;
  end;
end;

procedure SelectAll(MapX:TMapXObject; const bAutoRefresh:Boolean);
var
  i:Integer;
  lyr:Layer;
  OldAutoRedraw:Boolean;
begin
  OldAutoRedraw:=MapX.AutoRedraw;
  if bAutoRefresh then
    MapX.AutoRedraw := False;
  for i:=1 to MapX.Layers.Count do
  begin
    lyr:=MapX.Layers.Item[i];
    if (lyr.Selectable)and(lyr.type_=miLayerTypeNormal)and(lyr.Visible) then
      lyr.Selection.SelectAll(miSelectionNew);
  end;
  if bAutoRefresh then
  begin
    MapX.AutoRedraw := OldAutoRedraw;
    MapX.Refresh;
  end;
end;

procedure SelectFeatures(MapX:TMapXObject; ALyr:Layer; Fts:Features; const bAutoRefresh:Boolean);
var
  OldAutoRedraw:Boolean;
begin
  OldAutoRedraw:=MapX.AutoRedraw;
  if bAutoRefresh then
    MapX.AutoRedraw := False;

  ALyr.Selection.ClearSelection;
  if Fts.Count>0 then
    ALyr.Selection.Add(Fts);

  if bAutoRefresh then
  begin
    MapX.AutoRedraw := OldAutoRedraw;
    MapX.Refresh;
  end;
end;

procedure SelectFeature(MapX:TMapXObject; Ft:Feature; const bAutoRefresh:Boolean=True);
var
  OldAutoRedraw:Boolean;
  ALyr:Layer;
begin
  ALyr:=Ft.Layer;
  if ALyr<>nil then
  begin
    OldAutoRedraw:=MapX.AutoRedraw;
    if bAutoRefresh then
      MapX.AutoRedraw := False;

    ALyr.Selection.ClearSelection;
    ALyr.Selection.Add(Ft);

    if bAutoRefresh then
    begin
      MapX.AutoRedraw := OldAutoRedraw;
      MapX.Refresh;
    end;
  end;
end;

procedure InvertSelection(MapX:TMapXObject; ALyr:Layer; const bAutoRefresh:Boolean);
var
  i:Integer;
  allfts:Features;
  myfts:Features;
  OldAutoRedraw:Boolean;
begin
  OldAutoRedraw:=MapX.AutoRedraw;
  if bAutoRefresh then
    MapX.AutoRedraw := False;
  allfts:=ALyr.AllFeatures;
  myfts:=ALyr.NoFeatures;
  for i:=1 to allfts.Count do
    if not FeatureSelected(allfts.Item[i]) then
      myfts.Add(allfts.Item[i]);
  ALyr.Selection.ClearSelection;
  ALyr.Selection.Add(myfts);
  if bAutoRefresh then
  begin
    MapX.AutoRedraw := OldAutoRedraw;
    MapX.Refresh;
  end;
end;

procedure InvertSelection(MapX:TMapXObject; const bAutoRefresh:Boolean);
var
  i:Integer;
  lyr:Layer;
  OldAutoRedraw:Boolean;
begin
  OldAutoRedraw:=MapX.AutoRedraw;
  if bAutoRefresh then
    MapX.AutoRedraw := False;
  for i:=1 to MapX.Layers.Count do
  begin
    lyr:=MapX.Layers.Item[i];
    if lyr.Selectable then
      InvertSelection(MapX, lyr);
  end;
  if bAutoRefresh then
  begin
    MapX.AutoRedraw := OldAutoRedraw;
    MapX.Refresh;
  end;
end;

procedure ClearSelection(MapX:TMapXObject; ALyr:Layer; const bAutoRefresh:Boolean);
var
  OldAutoRedraw:Boolean;
begin
  OldAutoRedraw:=MapX.AutoRedraw;
  if bAutoRefresh then
    MapX.AutoRedraw := False;
  ALyr.Selection.ClearSelection;
  if bAutoRefresh then
  begin
    MapX.AutoRedraw := OldAutoRedraw;
    MapX.Refresh;
  end;
end;

procedure ClearSelection(MapX:TMapXObject; const bAutoRefresh:Boolean);
var
  i:Integer;
  lyr:Layer;
  OldAutoRedraw:Boolean;
begin
  OldAutoRedraw:=MapX.AutoRedraw;
  if bAutoRefresh then
    MapX.AutoRedraw := False;
  for i:=1 to MapX.Layers.Count do
  begin
    lyr:=MapX.Layers.Item[i];
    if lyr.type_=miLayerTypeNormal then
      lyr.Selection.ClearSelection;
  end;
  if bAutoRefresh then
  begin
    MapX.AutoRedraw := OldAutoRedraw;
    MapX.Refresh;
  end;
end;

procedure DeleteAllShapes(MapX:TMapXObject; ALyr:Layer; const bAutoRefresh:Boolean);
var
  i:Integer;
  fts:Features;
  OldAutoRedraw:Boolean;
begin
  OldAutoRedraw:=MapX.AutoRedraw;
  if bAutoRefresh then
    MapX.AutoRedraw := False;
  fts:=ALyr.AllFeatures;
  for i:=fts.Count downto 1 do
    ALyr.DeleteFeature(fts.Item[i]);
  if bAutoRefresh then
  begin
    MapX.AutoRedraw := OldAutoRedraw;
    MapX.Refresh;
  end;
end;

function ShapeCanAddPoint(Ft:Feature; PartIndex:Integer):Boolean;
begin
  if not Ft.Layer.Editable then
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