Qt&Vtk-023-MultiView

#ifndef MULTIVIEW_H
#define MULTIVIEW_H
#include <QWidget>
#include "QVTKOpenGWidget.h"               //新版本，旧版QVTKWidget
#include "vtkAutoInit.h"
#include "vtkAnnotationLink.h"
#include "vtkCommand.h"
#include "vtkDataRepresentation.h"
#include "vtkDataSetAttributes.h"
#include "vtkGraphLayoutView.h"
#include "vtkMutableDirectedGraph.h"
#include "vtkRandomGraphSource.h"
#include "vtkRenderer.h"
#include "vtkRenderWindow.h"
#include "vtkRenderWindowInteractor.h"
#include "vtkStringArray.h"
#include "vtkTree.h"
#include "vtkViewTheme.h"
#include "vector"
class ViewUpdater :public vtkCommand
{
public:
    static ViewUpdater* New()
    {
        return new ViewUpdater;
    }
    void AddView(vtkView *view)
    {
        this->Views.push_back(view);
        view->AddObserver(vtkCommand::SelectionChangedEvent,this);
    }
    void Execute(vtkObject*,unsigned long,void*)override
    {
        for(unsigned int i = 0;i<this->Views.size();i++)
        {
            this->Views[i]->Update();
        }
    }
private:
    ViewUpdater() = default;
    ~ViewUpdater() override = default;
    std::vector<vtkView*> Views;
};
namespace Ui {
class MultiView;
}
class MultiView : public QWidget
{
    Q_OBJECT
public:
    explicit MultiView(QWidget *parent = 0);
    ~MultiView();
private:
    Ui::MultiView *ui;
    vtkMutableDirectedGraph *graph = nullptr;
    vtkStringArray* labels = nullptr;
    vtkTree* tree = nullptr;
    vtkGraphLayoutView* view = nullptr;
    vtkGraphLayoutView* view2 = nullptr;
    vtkAnnotationLink* link = nullptr;
    ViewUpdater* update = nullptr;
};
#endif // MULTIVIEW_H

#include "multiview.h"
#include "ui_multiview.h"
MultiView::MultiView(QWidget *parent) :
    QWidget(parent),
    ui(new Ui::MultiView)
{
    ui->setupUi(this);
    graph = vtkMutableDirectedGraph::New();
    vtkIdType a = graph->AddVertex();
    vtkIdType b = graph->AddChild(a);
    vtkIdType c = graph->AddChild(a);
    vtkIdType d = graph->AddChild(b);
    vtkIdType e = graph->AddChild(c);
    vtkIdType f = graph->AddChild(c);
    labels = vtkStringArray::New();
    labels->SetName("Label");
    labels->InsertValue(a, "a");
    labels->InsertValue(b, "b");
    labels->InsertValue(c, "c");
    labels->InsertValue(d, "d");
    labels->InsertValue(e, "e");
    labels->InsertValue(f, "f");
    graph->GetVertexData()->AddArray(labels);
    tree = vtkTree::New();
    bool validTree = tree->CheckedShallowCopy(graph);
    if (!validTree)
    {
        std::cout << "ERROR: Invalid tree" << std::endl;
        graph->Delete();
        labels->Delete();
        tree->Delete();
    }
    view = vtkGraphLayoutView::New();
    view->SetRenderWindow(ui->widget->GetRenderWindow());
    vtkDataRepresentation* rep =view->SetRepresentationFromInput(tree);
    vtkViewTheme* theme = vtkViewTheme::CreateMellowTheme();
    view->ApplyViewTheme(theme);
    view->SetVertexColorArrayName("VertexDegree");
    view->SetColorVertices(true);
    view->SetVertexLabelArrayName("Label");
    view->SetVertexLabelVisibility(true);
    view2 = vtkGraphLayoutView::New();
    vtkDataRepresentation* rep2 =view2->SetRepresentationFromInput(tree);
    view2->SetVertexLabelArrayName("Label");
    view2->SetVertexLabelVisibility(true);
    link = vtkAnnotationLink::New();
    rep->SetAnnotationLink(link);
    rep2->SetAnnotationLink(link);
    update = ViewUpdater::New();
    update->AddView(view);
    update->AddView(view2);
}
MultiView::~MultiView()
{
    delete ui;
}