From 37bb879eecf9a8ce60f5cc71fb5aeb5878c1d645 Mon Sep 17 00:00:00 2001
From: jose guzman <jose@gmail.com>
Date: Wed, 30 Sep 2015 16:16:32 +0200
Subject: [PATCH] double click example test

---
 appli/examples/CMakeLists.txt               |   1 +
 appli/examples/example_Test_DoubleClick.cxx | 136 ++++++++++++++++++++
 2 files changed, 137 insertions(+)
 create mode 100644 appli/examples/example_Test_DoubleClick.cxx

diff --git a/appli/examples/CMakeLists.txt b/appli/examples/CMakeLists.txt
index a4fb5d7..d7e1579 100644
--- a/appli/examples/CMakeLists.txt
+++ b/appli/examples/CMakeLists.txt
@@ -34,6 +34,7 @@ ENDFOREACH(prog)
 SET(
   NOPLUGINS_EXAMPLES_PROGRAMS
   example_ContourWidget
+  example_Test_DoubleClick
   ## example_ExtractDICOMSeries
   ## example_ImageGaussianModelEstimator
   ## example_ReadQuadEdgeMeshWithoutPlugins
diff --git a/appli/examples/example_Test_DoubleClick.cxx b/appli/examples/example_Test_DoubleClick.cxx
new file mode 100644
index 0000000..bf357d2
--- /dev/null
+++ b/appli/examples/example_Test_DoubleClick.cxx
@@ -0,0 +1,136 @@
+#include <vtkRenderWindow.h>
+#include <vtkRenderWindowInteractor.h>
+#include <vtkRenderer.h>
+#include <vtkSphereSource.h>
+#include <vtkPolyDataMapper.h>
+#include <vtkActor.h>
+#include <vtkSmartPointer.h>
+#include <vtkPointPicker.h>
+#include <vtkCamera.h>
+#include <vtkInteractorStyleTrackballCamera.h>
+#include <vtkObjectFactory.h>
+
+#ifdef WIN32
+#include <windows.h>
+#else
+#endif
+
+// Define interaction style
+class MouseInteractorStyleDoubleClick : public vtkInteractorStyleTrackballCamera
+{
+public:
+
+	static MouseInteractorStyleDoubleClick* New();
+	vtkTypeMacro(MouseInteractorStyleDoubleClick, vtkInteractorStyleTrackballCamera);
+
+	MouseInteractorStyleDoubleClick() : NumberOfClicks(0), ResetPixelDistance(5), DoubleClickTolerance(1000)
+	{
+		this->PreviousPosition[0] = 0;
+		this->PreviousPosition[1] = 0;
+#ifdef WIN32
+		this->DoubleClickTolerance = GetDoubleClickTime();
+#else
+		// I dont have any idea if this has an equivalent for linux
+		//this->DoubleClickTolerance = GetDoubleClickTime();
+#endif
+	}
+
+	virtual void OnLeftButtonDown()
+	{
+		//std::cout << "Pressed left mouse button." << std::endl;
+		this->NumberOfClicks++;
+
+		if (this->NumberOfClicks > 1)
+		{
+			this->LastClickTime = this->CurrentClickTime;
+			this->CurrentClickTime = time(0);
+		} else
+		{
+			this->CurrentClickTime = time(0);
+		}
+
+		//std::cout << "NumberOfClicks = " << this->NumberOfClicks << std::endl;
+		int pickPosition[2];
+		this->GetInteractor()->GetEventPosition(pickPosition);
+
+		int xdist = pickPosition[0] - this->PreviousPosition[0];
+		int ydist = pickPosition[1] - this->PreviousPosition[1];
+
+		this->PreviousPosition[0] = pickPosition[0];
+		this->PreviousPosition[1] = pickPosition[1];
+
+		int moveDistance = (int)sqrt((double)(xdist*xdist + ydist*ydist));
+
+		// Reset numClicks - If mouse moved further than resetPixelDistance
+		if (moveDistance > this->ResetPixelDistance)
+		{
+			this->NumberOfClicks = 1;
+		}
+
+
+		if (this->NumberOfClicks == 2)
+		{
+			double  seconds = difftime(this->CurrentClickTime, this->LastClickTime);
+			if (seconds * 1000 <= this->DoubleClickTolerance)
+			{
+				std::cout << "Double clicked. with " << seconds << " of diference" << std::endl;
+				this->NumberOfClicks = 0;
+			} else
+			{
+				std::cout << "Too slow to be considered as a double click" << std::endl;
+				this->NumberOfClicks = 1;
+			}			
+			
+		}
+		// forward events
+		vtkInteractorStyleTrackballCamera::OnLeftButtonDown();
+	}
+
+private:
+	unsigned int NumberOfClicks;
+	int PreviousPosition[2];
+	int ResetPixelDistance;
+	double DoubleClickTolerance; // time in miliseconds
+	time_t LastClickTime;
+	time_t CurrentClickTime;
+};
+vtkStandardNewMacro(MouseInteractorStyleDoubleClick);
+
+int main(int, char *[])
+{
+	vtkSmartPointer<vtkSphereSource> sphereSource =
+		vtkSmartPointer<vtkSphereSource>::New();
+	sphereSource->SetCenter(0.0, 0.0, 0.0);
+	sphereSource->SetRadius(5.0);
+	sphereSource->Update();
+
+	vtkSmartPointer<vtkPolyDataMapper> mapper =
+		vtkSmartPointer<vtkPolyDataMapper>::New();
+	mapper->SetInputConnection(sphereSource->GetOutputPort());
+
+	vtkSmartPointer<vtkActor> actor =
+		vtkSmartPointer<vtkActor>::New();
+	actor->SetMapper(mapper);
+
+	vtkSmartPointer<vtkRenderer> renderer =
+		vtkSmartPointer<vtkRenderer>::New();
+	renderer->SetBackground(1, 1, 1); // Background color white
+	renderer->AddActor(actor);
+
+	vtkSmartPointer<vtkRenderWindow> renderWindow =
+		vtkSmartPointer<vtkRenderWindow>::New();
+	renderWindow->AddRenderer(renderer);
+
+	vtkSmartPointer<vtkRenderWindowInteractor> renderWindowInteractor =
+		vtkSmartPointer<vtkRenderWindowInteractor>::New();
+	renderWindowInteractor->SetRenderWindow(renderWindow);
+
+	vtkSmartPointer<MouseInteractorStyleDoubleClick> style =
+		vtkSmartPointer<MouseInteractorStyleDoubleClick>::New();
+	renderWindowInteractor->SetInteractorStyle(style);
+
+	renderWindowInteractor->Initialize();
+	renderWindowInteractor->Start();
+
+	return EXIT_SUCCESS;
+}
\ No newline at end of file
-- 
2.47.1