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Map_Layer.cpp
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2127 lines (1814 loc) · 55.7 KB
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// #pragma once
// Implementation of CMapView class (see other files as well)
// The properties and methods common for every layer are stored here.
// TODO: consider creation of Layers class as wrapper for this methods
// In this the members can copied to the new class. In the current class
// simple redirections will be used. To make m_alllayers, m_activelayers available
// the variables can be initialized with the pointers to underlying data of Layers class
#include <StdAfx.h>
#include "Map.h"
#include "Image.h"
#include "Grid.h"
#include "Shapefile.h"
#include "OgrLayer.h"
#include "ShapefileHelper.h"
#include "OgrHelper.h"
#include "TableHelper.h"
#include "WmsHelper.h"
// ************************************************************
// GetNumLayers()
// ************************************************************
long CMapView::GetNumLayers()
{
return _activeLayers.size();
}
// ************************************************************
// LayerName()
// ************************************************************
BSTR CMapView::GetLayerName(LONG layerHandle)
{
AFX_MANAGE_STATE(AfxGetStaticModuleState());
if (IsValidLayer(layerHandle))
{
return W2BSTR(_allLayers[layerHandle]->name);
}
ErrorMessage(tkINVALID_LAYER_HANDLE);
const CString result;
return result.AllocSysString();
}
void CMapView::SetLayerName(LONG layerHandle, LPCTSTR newVal)
{
AFX_MANAGE_STATE(AfxGetStaticModuleState());
if (IsValidLayer(layerHandle))
{
USES_CONVERSION;
const WCHAR* buffer = Utility::StringToWideChar(newVal);
_allLayers[layerHandle]->name = buffer;
delete[] buffer;
}
else
ErrorMessage(tkINVALID_LAYER_HANDLE);
}
// ****************************************************
// GetLayerDescription()
// ****************************************************
BSTR CMapView::GetLayerDescription(LONG layerHandle)
{
AFX_MANAGE_STATE(AfxGetStaticModuleState());
Layer* layer = GetLayer(layerHandle);
if (!layer) {
const CString result;
return result.AllocSysString();
}
return A2BSTR(layer->description);
}
// ****************************************************
// SetLayerDescription()
// ****************************************************
void CMapView::SetLayerDescription(LONG layerHandle, LPCTSTR newVal)
{
AFX_MANAGE_STATE(AfxGetStaticModuleState());
if (Layer* layer = GetLayer(layerHandle))
{
layer->description = newVal;
}
}
// ************************************************************
// LayerKey()
// ************************************************************
BSTR CMapView::GetLayerKey(long layerHandle)
{
USES_CONVERSION;
if (IsValidLayer(layerHandle))
{
return OLE2BSTR(_allLayers[layerHandle]->key);
}
ErrorMessage(tkINVALID_LAYER_HANDLE);
const CString result;
return result.AllocSysString();
}
void CMapView::SetLayerKey(long layerHandle, LPCTSTR lpszNewValue)
{
USES_CONVERSION;
if (IsValidLayer(layerHandle))
{
::SysFreeString(_allLayers[layerHandle]->key);
_allLayers[layerHandle]->key = A2BSTR(lpszNewValue);
}
else
ErrorMessage(tkINVALID_LAYER_HANDLE);
}
// ************************************************************
// LayerPosition()
// ************************************************************
long CMapView::GetLayerPosition(long layerHandle)
{
if (IsValidLayer(layerHandle))
{
const long endcondition = _activeLayers.size();
for (int i = 0; i < endcondition; i++)
{
if (_activeLayers[i] == layerHandle)
return i;
}
return -1;
}
ErrorMessage(tkINVALID_LAYER_HANDLE);
return -1;
}
// ************************************************************
// LayerHandle()
// ************************************************************
long CMapView::GetLayerHandle(long layerPosition)
{
// TODO: How to cast _activeLayers.size() to long?
if (layerPosition >= 0 && layerPosition < (long)_activeLayers.size())
{
return _activeLayers[layerPosition];
}
ErrorMessage(tkINVALID_LAYER_POSITION);
return -1;
}
// ************************************************************
// GetLayerVisible()
// ************************************************************
BOOL CMapView::GetLayerVisible(long layerHandle)
{
if (IsValidLayer(layerHandle))
{
return _allLayers[layerHandle]->get_Visible();
}
ErrorMessage(tkINVALID_LAYER_HANDLE);
return FALSE;
}
// ************************************************************
// SetLayerVisible()
// ************************************************************
void CMapView::SetLayerVisible(long layerHandle, BOOL bNewValue)
{
if (IsValidLayer(layerHandle))
{
_allLayers[layerHandle]->put_Visible(bNewValue != FALSE);
// we need to refresh the buffer here
if (_allLayers[layerHandle]->IsImage())
{
if (_allLayers[layerHandle]->get_Object())
{
IImage* iimg;
if (_allLayers[layerHandle]->QueryImage(&iimg))
{
//static_cast<CImageClass*>(iimg)->SetBufferReloadIsNeeded();
dynamic_cast<CImageClass*>(iimg)->SetBufferReloadIsNeeded();
iimg->Release();
}
}
}
RedrawCore(RedrawAll, false);
}
else
{
ErrorMessage(tkINVALID_LAYER_HANDLE);
}
}
// ************************************************************
// GetGetObject()
// ************************************************************
LPDISPATCH CMapView::GetGetObject(long layerHandle)
{
if (IsValidLayer(layerHandle))
{
if (_allLayers[layerHandle]->get_LayerType() == OgrLayerSource)
{
// for OGR layers we return underlying shapefile to make it compliant with existing client code
IShapefile* sf = nullptr;
_allLayers[layerHandle]->QueryShapefile(&sf);
return sf;
}
IDispatch* obj = _allLayers[layerHandle]->get_Object();
if (obj != nullptr) obj->AddRef();
return obj;
}
ErrorMessage(tkINVALID_LAYER_HANDLE);
return nullptr;
}
// ***************************************************************
// AddLayerFromFilename()
// ***************************************************************
long CMapView::AddLayerFromFilename(LPCTSTR filename, tkFileOpenStrategy openStrategy, VARIANT_BOOL visible)
{
USES_CONVERSION;
IDispatch* layer = nullptr;
const CComBSTR bstr(filename);
_fileManager->Open(bstr, openStrategy, _globalCallback, &layer);
if (layer) {
const long handle = AddLayer(layer, visible);
layer->Release();
return handle;
}
return -1;
}
// ***************************************************************
// AddLayerFromDatabase()
// ***************************************************************
long CMapView::AddLayerFromDatabase(LPCTSTR connectionString, LPCTSTR layerNameOrQuery, VARIANT_BOOL visible)
{
USES_CONVERSION;
IOgrLayer* layer = nullptr;
const CComBSTR bstrConnection(connectionString);
const CComBSTR bstrQuery(layerNameOrQuery);
_fileManager->OpenFromDatabase(bstrConnection, bstrQuery, &layer);
if (layer) {
const long handle = AddLayer(layer, visible);
layer->Release();
return handle;
}
return -1;
}
// ***************************************************************
// AddLayerCore()
// ***************************************************************
int CMapView::AddLayerCore(Layer* layer)
{
int layerHandle = -1;
for (size_t i = 0; i < _allLayers.size(); i++)
{
if (!_allLayers[i]) // that means we can reuse it
{
layerHandle = i;
_allLayers[i] = layer;
break;
}
}
if (layerHandle == -1)
{
layerHandle = _allLayers.size();
_allLayers.push_back(layer);
}
_activeLayers.push_back(layerHandle);
return layerHandle;
}
// ***************************************************************
// AttachGlobalCallbackToLayers()
// ***************************************************************
void CMapView::AttachGlobalCallbackToLayers(IDispatch* object)
{
if (!m_globalSettings.attachMapCallbackToLayers || !_globalCallback) return;
CComPtr<IShapefile> ishp = nullptr;
CComPtr<IImage> iimg = nullptr;
CComPtr<IGrid> igrid = nullptr;
CComPtr<IOgrLayer> iogr = nullptr;
object->QueryInterface(IID_IShapefile, reinterpret_cast<void**>(&ishp));
object->QueryInterface(IID_IImage, reinterpret_cast<void**>(&iimg));
object->QueryInterface(IID_IGrid, reinterpret_cast<void**>(&igrid));
object->QueryInterface(IID_IOgrLayer, reinterpret_cast<void**>(&iogr));
CComPtr<ICallback> callback = nullptr;
if (igrid) {
igrid->get_GlobalCallback(&callback);
if (!callback) {
igrid->put_GlobalCallback(_globalCallback);
}
}
if (iimg) {
iimg->put_GlobalCallback(_globalCallback);
if (!callback) {
iimg->put_GlobalCallback(_globalCallback);
}
}
if (ishp) {
ishp->put_GlobalCallback(_globalCallback);
if (!callback) {
ishp->put_GlobalCallback(_globalCallback);
}
}
if (iogr)
{
iogr->put_GlobalCallback(_globalCallback);
if (!callback) {
iogr->put_GlobalCallback(_globalCallback);
}
}
}
// ***************************************************************
// AddLayer()
// ***************************************************************
long CMapView::AddLayer(LPDISPATCH object, BOOL visible)
{
long layerHandle = -1;
if (!object)
{
ErrorMessage(tkUNEXPECTED_NULL_PARAMETER);
return layerHandle;
}
CComPtr<IOgrDatasource> ds = nullptr;
object->QueryInterface(IID_IOgrDatasource, (void**)&ds); // TODO: Don't use C-style cast
if (ds)
{
const bool mapIsEmpty = GetNumLayers() == 0;
const int layerCount = OgrHelper::GetLayerCount(ds);
if (layerCount == 0)
{
ErrorMessage(tkOGR_DATASOURCE_EMPTY);
return layerHandle;
}
LockWindow(lmLock);
for (int i = 0; i < layerCount; i++)
{
CComPtr<IOgrLayer> layer = nullptr;
ds->GetLayer(i, VARIANT_FALSE, &layer);
if (layer) {
layerHandle = AddSingleLayer(layer, visible); // recursion is here
}
}
if (mapIsEmpty && GetNumLayers() > 0 && m_globalSettings.zoomToFirstLayer)
ZoomToMaxExtents();
LockWindow(lmUnlock);
return layerHandle; // returning the last layer handle
}
return AddSingleLayer(object, visible);
}
// ***************************************************************
// AddSingleLayer()
// ***************************************************************
long CMapView::AddSingleLayer(LPDISPATCH object, BOOL visible)
{
long layerHandle = -1;
IShapefile* ishp = nullptr;
object->QueryInterface(IID_IShapefile, (void**)&ishp); // TODO: Don't use C-style cast
IImage* iimg = nullptr;
object->QueryInterface(IID_IImage, (void**)&iimg); // TODO: Don't use C-style cast
IGrid* igrid = nullptr;
object->QueryInterface(IID_IGrid, (void**)&igrid); // TODO: Don't use C-style cast
IOgrLayer* iogr = nullptr;
object->QueryInterface(IID_IOgrLayer, (void**)&iogr); // TODO: Don't use C-style cast
IWmsLayer* iwms = nullptr;
object->QueryInterface(IID_IWmsLayer, (void**)&iwms); // TODO: Don't use C-style cast
if (!igrid && !iimg && !ishp && !iogr && !iwms)
{
ErrorMessage(tkINTERFACE_NOT_SUPPORTED);
return -1;
}
AttachGlobalCallbackToLayers(object);
LockWindow(lmLock);
Layer* l = nullptr;
if (ishp != nullptr || iogr != nullptr)
{
if (ishp)
{
tkShapefileSourceType type;
ishp->get_SourceType(&type);
if (type == sstUninitialized)
{
ErrorMessage(tkSHAPEFILE_UNINITIALIZED);
LockWindow(lmUnlock);
return -1;
}
CComPtr<ITable> table = nullptr;
ishp->get_Table(&table);
if (table)
{
if (ShapefileHelper::GetNumShapes(ishp) != TableHelper::GetNumRows(table))
ErrorMessage(tkDBF_RECORDS_SHAPES_MISMATCH); // report it but allow to proceed
}
}
l = new Layer();
if (ishp) l->set_Object(ishp);
else l->set_Object(iogr);
l->put_LayerType(ishp ? ShapefileLayer : OgrLayerSource);
l->UpdateExtentsFromDatasource();
l->put_Visible(visible != FALSE);
layerHandle = AddLayerCore(l);
}
// grids aren't added directly; an image representation is created first
// using particular color scheme
if (igrid != nullptr)
{
tkGridSourceType sourceType;
igrid->get_SourceType(&sourceType);
if (sourceType == tkGridSourceType::gstUninitialized)
{
ErrorMessage(tkGRID_NOT_INITIALIZED);
LockWindow(lmUnlock);
return -1;
}
//CGrid* grid = static_cast<CGrid*>(igrid);
const auto grid = dynamic_cast<CGrid*>(igrid);
CStringW gridFilename = grid->GetFilename();
CStringW proxyName = grid->GetProxyName();
//CStringW legendName = grid->GetProxyLegendName();
CStringW imageName;
const PredefinedColorScheme coloring = m_globalSettings.GetGridColorScheme();
CComPtr<IGridColorScheme> gridColorScheme = nullptr;
igrid->RetrieveOrGenerateColorScheme(gsrAuto, gsgGradient, coloring, &gridColorScheme);
if (gridColorScheme)
{
// there is no proxy; either create a new one or opening directly
ICallback* cback = nullptr;
igrid->get_GlobalCallback(&cback);
tkGridProxyMode displayMode;
igrid->get_PreferedDisplayMode(&displayMode);
igrid->OpenAsImage(gridColorScheme, displayMode, cback, &iimg);
if (cback) cback->Release();
if (iimg)
{
// load transparency, etc
// update color scheme from disk, as it's the one that is actually used;
// and not necessarily the one we passed to Grid.OpenAsImage
VARIANT_BOOL vb;
VARIANT_BOOL isProxy;
iimg->get_IsGridProxy(&isProxy);
const CStringW legendName = isProxy ? grid->GetProxyLegendName() : grid->GetLegendName();
CComPtr<IGridColorScheme> newScheme = nullptr;
ComHelper::CreateInstance(tkInterface::idGridColorScheme, (IDispatch**)&newScheme); // TODO: Don't use C-style cast
const CComBSTR bstrName(legendName);
const CComBSTR bstrElementName("GridColoringScheme");
newScheme->ReadFromFile(bstrName, bstrElementName, &vb);
if (vb)
{
dynamic_cast<CImageClass*>(iimg)->LoadImageAttributesFromGridColorScheme(newScheme);
}
}
}
}
// it may be either directly opened image or the one created for the grid
if (iimg != nullptr)
{
tkImageSourceType type;
iimg->get_SourceType(&type);
if (type == istUninitialized)
{
ErrorMessage(tkIMAGE_UNINITIALIZED);
LockWindow(lmUnlock);
return -1;
}
l = new Layer();
l->set_Object(iimg);
l->put_LayerType(ImageLayer);
l->put_Visible(visible != FALSE);
l->UpdateExtentsFromDatasource();
layerHandle = AddLayerCore(l);
// try to save pixels in case image grouping is enabled
if (_canUseImageGrouping)
{
if (!dynamic_cast<CImageClass*>(iimg)->SaveNotNullPixels()) // analyzing pixels...
iimg->put_CanUseGrouping(VARIANT_FALSE); // don't try this image any more, before transparency values will be changed
}
}
// WMS layer
if (iwms != nullptr)
{
l = new Layer();
l->set_Object(iwms);
l->put_LayerType(WmsLayerSource);
l->put_Visible(visible != FALSE);
UpdateWmsLayerBounds(iwms, *l);
layerHandle = AddLayerCore(l);
}
l->GrabLayerNameFromDatasource();
GrabLayerProjection(l);
const bool diskSymbology = m_globalSettings.loadSymbologyOnAddLayer && l->IsDiskBased();
CStringW symbologyName;
if (diskSymbology)
{
// find out filename with symbology before file was substituted by reprojection
CComBSTR bstrFilename;
bstrFilename.Attach(GetLayerFilename(layerHandle));
symbologyName = OLE2W(bstrFilename);
symbologyName += L".mwsymb";
symbologyName = Utility::FileExistsW(symbologyName) ? OLE2W(bstrFilename) : L"";
}
// do projection mismatch check
if (!CheckLayerProjection(l, layerHandle))
{
RemoveLayerCore(layerHandle, false, false, true);
LockWindow(lmUnlock);
return -1;
}
if (m_globalSettings.loadSymbologyOnAddLayer)
{
// loading symbology
if (diskSymbology)
{
if (symbologyName.GetLength() > 0) {
CComBSTR desc;
USES_CONVERSION;
this->LoadLayerOptionsCore(W2A(symbologyName), layerHandle, "", &desc);
}
}
else {
LoadOgrStyle(l, layerHandle, L"", false); // perhaps it's OGR database table
}
}
if (l != nullptr) {
FireLayerAdded(layerHandle);
}
// grid opened event
if (iimg)
{
VARIANT_BOOL rgb, isProxy;
iimg->get_IsRgb(&rgb);
iimg->get_IsGridProxy(&isProxy);
if (!rgb || isProxy)
{
int bandIndex = -1;
CComBSTR bstrName;
iimg->get_SourceGridName(&bstrName);
iimg->get_SourceGridBandIndex(&bandIndex);
USES_CONVERSION;
FireGridOpened(layerHandle, OLE2A(bstrName), bandIndex, isProxy);
}
}
// set initial extents
if (l != nullptr && m_globalSettings.zoomToFirstLayer)
{
if (_activeLayers.size() == 1 && visible)
{
if (!l->IsEmpty())
{
SetExtentsWithPadding(l->extents);
}
}
}
ScheduleLayerRedraw();
LockWindow(lmUnlock);
return layerHandle;
}
// ***************************************************************
// UpdateWmsLayerBounds()
// ***************************************************************
void CMapView::UpdateWmsLayerBounds(IWmsLayer* wms, Layer& layer)
{
CComPtr<IGeoProjection> gp = nullptr;
wms->get_GeoProjection(&gp);
// if there is no projection - no extents either
VARIANT_BOOL vb;
if (gp->get_IsEmpty(&vb) == S_OK && vb == VARIANT_TRUE)
{
layer.extents = Extent();
return;
}
// extracted bounds in server projection
Extent projBox;
if (!WmsHelper::GetServerBounds(wms, projBox)) {
return;
}
// same as map ?
VARIANT_BOOL isSame;
IExtents* mapBox = GetExtents();
gp->get_IsSameExt(_projection, mapBox, 10, &isSame);
mapBox->Release();
if (isSame)
{
layer.extents = projBox;
}
else {
// need to transform them first
VARIANT_BOOL vb;
gp->StartTransform(_projection, &vb);
if (vb)
{
VARIANT_BOOL vb2, vb3;
gp->Transform(&projBox.left, &projBox.top, &vb2);
gp->Transform(&projBox.right, &projBox.bottom, &vb3);
if (vb2 && vb3) {
layer.extents = projBox;
}
// TODO: No need to call StopTransform??
}
}
}
// ***************************************************************
// AdjustWmsLayerVerticalPosition()
// ***************************************************************
/// Moves new WMS layer below all data layers but above existing WMS layers.
void CMapView::AdjustWmsLayerVerticalPosition(int layerHandle)
{
if (!GetLayer(layerHandle)) return;
const int position = GetLayerPosition(layerHandle);
for (long i = 0; i < GetNumLayers(); i++)
{
Layer* layer = get_LayerByPosition(i);
if (!layer || layer->IsEmpty()) continue;
if (layer->IsWmsLayer()) continue;
MoveLayer(position, i);
break;
}
}
// ***************************************************************
// LoadOgrStyle()
// ***************************************************************
VARIANT_BOOL CMapView::LoadOgrStyle(Layer* layer, long layerHandle, CStringW name, bool reportError)
{
VARIANT_BOOL result = VARIANT_FALSE;
CComPtr<IOgrLayer> ogrLayer = nullptr;
layer->QueryOgrLayer(&ogrLayer);
if (!ogrLayer)
return result;
if (OgrHelper::GetSourceType(ogrLayer) != ogrDbTable)
return result;
const CStringW xml = OgrHelper::Cast(ogrLayer)->LoadStyleXML(name);
if (xml.GetLength() == 0)
{
if (reportError)
ErrorMessage(tkOGR_STYLE_NOT_FOUND); // TODO: Should this be an error?
return result;
}
if (CPLXMLNode* root = CPLParseXMLString(Utility::ConvertToUtf8(xml))) {
if (CPLXMLNode* node = CPLGetXMLNode(root, "Layer")) {
result = DeserializeLayerOptionsCore(layerHandle, node);
}
CPLDestroyXMLNode(root);
}
return result;
}
// ***************************************************************
// GrabLayerProjection()
// ***************************************************************
void CMapView::GrabLayerProjection(Layer* layer)
{
// if we don't have a projection, let's try and grab projection from it
if (_grabProjectionFromData && layer)
{
VARIANT_BOOL isEmpty = VARIANT_FALSE;
GetMapProjection()->get_IsEmpty(&isEmpty);
if (isEmpty)
{
if (IGeoProjection* gp = layer->GetGeoProjection())
{
gp->get_IsEmpty(&isEmpty);
if (!isEmpty)
{
IGeoProjection* newProj = nullptr;
gp->Clone(&newProj);
if (!newProj)
{
ErrorMsg(tkFAILED_TO_COPY_PROJECTION);
}
else
{
SetGeoProjection(newProj);
newProj->Release();
}
}
gp->Release();
}
}
}
}
// ***************************************************************
// CheckLayerProjection()
// ***************************************************************
bool CMapView::CheckLayerProjection(Layer* layer, int layerHandle)
{
IGeoProjection* gpMap = GetMapProjection();
if (layer->IsWmsLayer())
{
// if there is valid map projection we shall be able to do transformation
if (_transformationMode == tmNotDefined)
{
CallbackHelper::ErrorMsg("Can't add WMS layer: map projection is empty or doesn't support required transformation.");
return false;
}
}
CComPtr<IGeoProjection> gp = nullptr;
gp.Attach(layer->GetGeoProjection());
VARIANT_BOOL vb;
if (gp->get_IsEmpty(&vb) == S_OK && vb == VARIANT_TRUE)
{
tkMwBoolean cancel = m_globalSettings.allowLayersWithoutProjection ? blnFalse : blnTrue;
FireLayerProjectionIsEmpty(layerHandle, &cancel);
if (cancel == blnTrue) {
ErrorMessage(tkMISSING_GEOPROJECTION);
return false;
}
// even if user accepted the layer but it clearly doesn't fit we will reject it
if (gpMap->get_IsGeographic(&vb) == S_OK && vb == VARIANT_TRUE && layer->extents.OutsideWorldBounds())
{
ErrorMessage(tkGEOGRAPHIC_PROJECTION_EXPECTED);
return false;
}
return true;
}
// makes no sense to do the matching
if (gpMap->get_IsEmpty(&vb) == S_OK && vb == VARIANT_TRUE) return true;
// mismatch testing
CComPtr<IExtents> bounds = nullptr;
layer->GetExtentsAsNewInstance(&bounds);
if (gp->get_IsSameExt(gpMap, bounds, 20, &vb) == S_OK && vb == VARIANT_TRUE)
return true;
tkMwBoolean cancelAdding = m_globalSettings.allowProjectionMismatch ? blnFalse : blnTrue;
tkMwBoolean reproject = m_globalSettings.reprojectLayersOnAdding ? blnTrue : blnFalse;
FireProjectionMismatch(layerHandle, &cancelAdding, &reproject);
if (cancelAdding)
{
ErrorMessage(tkPROJECTION_MISMATCH);
return false;
}
if (!reproject) return true; //basically ignore it
if (layer->IsImage())
{
ErrorMessage(tkNO_REPROJECTION_FOR_IMAGES);
return false;
}
if (layer->IsShapefile())
{
// save reprojected state
return ReprojectLayer(layer, layerHandle);
}
// for other layer types potentially added in the future
return true;
}
// ***************************************************************
// ReprojectLayer()
// ***************************************************************
bool CMapView::ReprojectLayer(Layer* layer, int layerHandle)
{
// let's try to do a transformation
CComPtr<IShapefile> sf = nullptr;
if (!layer->QueryShapefile(&sf))
return false;
const long numShapes = ShapefileHelper::GetNumShapes(sf);
if (numShapes > m_globalSettings.maxReprojectionShapeCount)
{
// OGR layers can potentially have millions of features, so let's be cautions not to start something too lengthy
ErrorMessage(tkREPROJECTION_TOO_MUCH_SHAPES);
return false;
}
long count;
IShapefile* sfNew = nullptr;
sf->Reproject(GetMapProjection(), &count, &sfNew);
// to be considered successful, the new Shapefile (sfNew) must have been allocated AND
// either all shapes have been reprojected OR we are allowing layers with incomplete reprojection;
if (!sfNew || numShapes != count && !m_globalSettings.allowLayersWithIncompleteReprojection)
{
// reprojection failed
FireLayerReprojected(layerHandle, VARIANT_FALSE);
if (sfNew) sfNew->Release();
ErrorMessage(tkFAILED_TO_REPROJECT);
return false;
}
// let's substitute original shapefile with the reprojected one
// don't close the original shapefile; user may still want to interact with it
if (layer->get_LayerType() == OgrLayerSource)
{
CComPtr<IOgrLayer> ogr = nullptr;
layer->QueryOgrLayer(&ogr);
if (ogr) {
// don't need to Release original Shapefile reference here,
// since InjectShapefile Closes/Releases original reference
OgrHelper::Cast(ogr)->InjectShapefile(sfNew);
}
}
else
{
// need to Release original reference for Shapefile here,
// since we are directly replacing old reference with new
ShapefileHelper::Cast(sf)->Release();
layer->set_Object(sfNew);
}
layer->UpdateExtentsFromDatasource();
// if not all shapes could be reprojected, let the world know
if (numShapes != count)
{
// in case this was an Ogr layer, event should be fired AFTER new Shapefile was 'injected' into OgrLayerSource
FireLayerReprojectedIncomplete(layerHandle, count, numShapes);
}
// always fire LayerReprojected event
FireLayerReprojected(layerHandle, VARIANT_TRUE);
return true;
}
// ***************************************************************
// RemoveLayerCore()
// ***************************************************************
void CMapView::RemoveLayerCore(long layerHandle, bool closeDatasources, bool fromRemoveAll, bool suppressEvent)
{
try
{
if (!IsValidLayer(layerHandle))
{
ErrorMessage(tkINVALID_LAYER_HANDLE);
return;
}
const bool hadLayers = _activeLayers.size() > 0;
if (layerHandle >= (long)_allLayers.size()) return; // TODO: How to cast _activeLayers.size() to long?
Layer* l = _allLayers[layerHandle];
if (l == nullptr) return;
if (closeDatasources) {
l->CloseDatasources();
}
else {
l->OnRemoved();
}
for (unsigned int i = 0; i < _activeLayers.size(); i++)
{
if (_activeLayers[i] == layerHandle)
{
_activeLayers.erase(_activeLayers.begin() + i);
break;
}
}
try
{
// This may have been deleted already.
if (_allLayers[layerHandle] != nullptr)
{
delete _allLayers[layerHandle];
}
}
catch (...)
{
Debug::WriteError("Exception during RemoveLayer.");
}
_allLayers[layerHandle] = nullptr;
_identifiedShapes->RemoveByLayerHandle(layerHandle);
if (_activeLayers.size() == 0 && hadLayers)
ClearMapProjectionWithLastLayer();
if (!suppressEvent)
FireLayerRemoved(layerHandle, fromRemoveAll ? VARIANT_TRUE : VARIANT_FALSE);
Redraw();
}
catch (...)
{
Debug::WriteError("Exception during RemoveLayer.");
}
}
// ***************************************************************
// RemoveLayer()
// ***************************************************************
void CMapView::RemoveLayer(long layerHandle)
{
RemoveLayerCore(layerHandle, true);
}
// ***************************************************************
// RemoveLayerWithoutClosing()
// ***************************************************************
void CMapView::RemoveLayerWithoutClosing(long layerHandle)
{
RemoveLayerCore(layerHandle, false);
}
// ***************************************************************
// RemoveAllLayers()
// ***************************************************************
void CMapView::RemoveAllLayers()