Merge multi-touch gestures event branch
This is a squashed commit of the SOC2017_GESTURES branch from https://github.com/prashantkn94/wxWidgets.git Closes https://github.com/wxWidgets/wxWidgets/pull/551
This commit is contained in:
prashantkn94
committed by
Vadim Zeitlin
Vadim Zeitlin
parent
aef4edb969
commit
261b04b5a3
216
samples/event/gestures.cpp
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216
samples/event/gestures.cpp
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#include "gestures.h"
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#include "wx/dcgraph.h"
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MyGestureFrame::MyGestureFrame()
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: wxFrame(NULL, wxID_ANY, "Multi-touch Gestures", wxDefaultPosition, wxSize(800, 600))
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{
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// Create controls
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MyGesturePanel *myPanel = new MyGesturePanel(this);
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m_logText = new wxTextCtrl(this, wxID_ANY, wxEmptyString, wxDefaultPosition,
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wxSize(wxDefaultCoord, 100), wxTE_MULTILINE|wxTE_READONLY|wxTE_RICH);
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// Add controls to sizer
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wxBoxSizer* sizer = new wxBoxSizer(wxVERTICAL);
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sizer->Add(myPanel, wxSizerFlags(1).Expand());
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sizer->Add(m_logText, wxSizerFlags().Expand());
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SetSizer(sizer);
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// Log to the text control
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delete wxLog::SetActiveTarget(new wxLogTextCtrl(m_logText));
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// Bind all gestures to the same event handler, which must run before
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// the other handlers, to clear the log window
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myPanel->Bind(wxEVT_GESTURE_PAN, &MyGestureFrame::OnGesture, this);
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myPanel->Bind(wxEVT_GESTURE_ZOOM, &MyGestureFrame::OnGesture, this);
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myPanel->Bind(wxEVT_GESTURE_ROTATE, &MyGestureFrame::OnGesture, this);
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myPanel->Bind(wxEVT_TWO_FINGER_TAP, &MyGestureFrame::OnGesture, this);
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myPanel->Bind(wxEVT_LONG_PRESS, &MyGestureFrame::OnGesture, this);
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myPanel->Bind(wxEVT_PRESS_AND_TAP, &MyGestureFrame::OnGesture, this);
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Bind(wxEVT_CLOSE_WINDOW, &MyGestureFrame::OnQuit, this);
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}
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MyGesturePanel::MyGesturePanel(MyGestureFrame *parent) : wxPanel(parent, wxID_ANY)
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{
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// Load an image
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if ( !m_bitmap.LoadFile("../image/horse.jpg", wxBITMAP_TYPE_JPEG) )
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{
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wxLogError("Can't load the image");
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}
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else
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{
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Bind(wxEVT_PAINT, &MyGesturePanel::OnPaint, this);
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}
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// Event handlers
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Bind(wxEVT_GESTURE_PAN, &MyGesturePanel::OnPan, this);
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Bind(wxEVT_GESTURE_ZOOM, &MyGesturePanel::OnZoom, this);
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Bind(wxEVT_GESTURE_ROTATE, &MyGesturePanel::OnRotate, this);
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Bind(wxEVT_TWO_FINGER_TAP, &MyGesturePanel::OnTwoFingerTap, this);
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Bind(wxEVT_LONG_PRESS, &MyGesturePanel::OnLongPress, this);
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Bind(wxEVT_PRESS_AND_TAP, &MyGesturePanel::OnPressAndTap, this);
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m_lastZoomFactor = 1.0;
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}
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void MyGestureFrame::OnQuit(wxCloseEvent& WXUNUSED(event))
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{
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Destroy();
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}
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void MyGestureFrame::OnGesture(wxGestureEvent& event)
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{
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if ( event.IsGestureStart() )
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m_logText->Clear();
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event.Skip();
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}
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void MyGesturePanel::OnPaint(wxPaintEvent& WXUNUSED(event))
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{
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wxPaintDC paintDC(this);
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wxGCDC dc(paintDC);
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dc.Clear();
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dc.SetTransformMatrix(m_affineMatrix);
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dc.DrawBitmap(m_bitmap, wxRound(m_translateDistance.m_x), wxRound(m_translateDistance.m_y));
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}
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void MyGesturePanel::OnPan(wxPanGestureEvent& event)
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{
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if ( event.IsGestureStart() )
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{
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wxLogMessage("Pan gesture started\n");
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}
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wxLogMessage("Pan gesture performed with deltaX = %d and deltaY = %d, with current position (%d,%d)\n",
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event.GetDeltaX(), event.GetDeltaY(), event.GetPosition().x, event.GetPosition().y);
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// Transform the distance using the tranpose of the matrix,
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// in order to translate the image to match the screen coordinates
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wxMatrix2D m;
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m_affineMatrix.Get(&m, NULL);
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wxPoint2DDouble delta(m.m_11 * event.GetDeltaX() + m.m_12 * event.GetDeltaY(),
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m.m_21 * event.GetDeltaX() + m.m_22 * event.GetDeltaY());
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// Add it to the total translation
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m_translateDistance += delta;
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if ( event.IsGestureEnd() )
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{
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wxLogMessage("Pan gesture Ended\n");
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}
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Refresh();
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}
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void MyGesturePanel::OnZoom(wxZoomGestureEvent& event)
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{
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if ( event.IsGestureStart() )
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{
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wxLogMessage("Zoom gesture started\n");
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m_lastZoomFactor = 1.0;
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}
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wxLogMessage("Zoom gesture performed with zoom center at (%d, %d) and zoom Factor = %f\n",
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event.GetPosition().x, event.GetPosition().y, event.GetZoomFactor());
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const wxPoint& zoomCenter = event.GetPosition();
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// Translate to zoom center
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m_affineMatrix.Translate(zoomCenter.x, zoomCenter.y);
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// Scale
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m_affineMatrix.Scale(event.GetZoomFactor() / m_lastZoomFactor, event.GetZoomFactor() / m_lastZoomFactor);
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// Translate back
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m_affineMatrix.Translate(-zoomCenter.x, -zoomCenter.y);
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if ( event.IsGestureEnd() )
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{
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wxLogMessage("Zoom gesture Ended\n");
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}
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m_lastZoomFactor = event.GetZoomFactor();
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Refresh();
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}
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void MyGesturePanel::OnRotate(wxRotateGestureEvent& event)
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{
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if ( event.IsGestureStart() )
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{
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wxLogMessage("Rotate gesture started\n");
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m_lastRotationAngle = 0.0;
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}
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wxLogMessage("Rotate gesture performed with rotation center at (%d, %d) and cumulative rotation angle = %f\n",
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event.GetPosition().x, event.GetPosition().y, event.GetRotationAngle());
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const wxPoint& rotationCenter = event.GetPosition();
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// Translate to rotation center
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m_affineMatrix.Translate(rotationCenter.x, rotationCenter.y);
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// Rotate
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m_affineMatrix.Rotate(event.GetRotationAngle() - m_lastRotationAngle);
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// Translate back
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m_affineMatrix.Translate(-rotationCenter.x, -rotationCenter.y);
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if ( event.IsGestureEnd() )
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{
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wxLogMessage("Rotate gesture Ended\n");
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}
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m_lastRotationAngle = event.GetRotationAngle();
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Refresh();
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}
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void MyGesturePanel::OnTwoFingerTap(wxTwoFingerTapEvent& event)
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{
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if ( event.IsGestureStart() )
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{
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wxLogMessage("Two Finger Tap gesture gesture started\n");
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}
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wxLogMessage("Two Finger Tap gesture performed at (%d, %d)\n", event.GetPosition().x, event.GetPosition().y);
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if ( event.IsGestureEnd() )
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{
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wxLogMessage("Two Finger Tap gesture Ended\n");
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}
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}
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void MyGesturePanel::OnLongPress(wxLongPressEvent& event)
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{
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if ( event.IsGestureStart() )
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{
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wxLogMessage("Long Press gesture started\n");
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}
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wxLogMessage("Long Press gesture performed at (%d,%d)\n", event.GetPosition().x, event.GetPosition().y);
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if ( event.IsGestureEnd() )
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{
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wxLogMessage("Long Press gesture Ended\n");
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}
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}
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void MyGesturePanel::OnPressAndTap(wxPressAndTapEvent& event)
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{
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if ( event.IsGestureStart() )
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{
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wxLogMessage("Press and Tap gesture started\n");
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}
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wxLogMessage("Press and Tap gesture performed at (%d,%d)\n", event.GetPosition().x, event.GetPosition().y);
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if ( event.IsGestureEnd() )
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{
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wxLogMessage("Press and Tap gesture Ended\n");
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}
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}
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