initial commit

Signed-off-by: Peter Siegmund <mars3142@noreply.mars3142.dev>

libs/wxWidgets-3.3.1/samples/event/gestures.cpp

@@ -0,0 +1,248 @@
+#include "gestures.h"
+#include "wx/dcgraph.h"
+#include "wx/dcbuffer.h"
+
+#include "../image/horse.xpm"
+
+MyGestureFrame::MyGestureFrame()
+    : wxFrame(nullptr, wxID_ANY, "Multi-touch Gestures", wxDefaultPosition, wxSize(800, 600))
+{
+    // Create controls
+    MyGesturePanel *myPanel = new MyGesturePanel(this);
+    m_logText = new wxTextCtrl(this, wxID_ANY, wxEmptyString, wxDefaultPosition,
+                    wxSize(wxDefaultCoord, 100), wxTE_MULTILINE|wxTE_READONLY|wxTE_RICH);
+
+    // Add controls to sizer
+    wxBoxSizer* sizer = new wxBoxSizer(wxVERTICAL);
+    sizer->Add(myPanel, wxSizerFlags(1).Expand());
+    sizer->Add(m_logText, wxSizerFlags().Expand());
+    SetSizer(sizer);
+
+    // Set a minimum size for the frame
+    wxSize dsplySz = wxGetDisplaySize();
+    SetSizeHints(wxMin(800,dsplySz.GetWidth()), wxMin(600,dsplySz.GetHeight()));
+
+    // Log to the text control
+    m_logOld = wxLog::SetActiveTarget(new wxLogTextCtrl(m_logText));
+
+    // Bind all gestures to the same event handler, which must run before
+    // the other handlers, to clear the log window
+    myPanel->Bind(wxEVT_GESTURE_PAN, &MyGestureFrame::OnGesture, this);
+    myPanel->Bind(wxEVT_GESTURE_ZOOM, &MyGestureFrame::OnGesture, this);
+    myPanel->Bind(wxEVT_GESTURE_ROTATE, &MyGestureFrame::OnGesture, this);
+    myPanel->Bind(wxEVT_TWO_FINGER_TAP, &MyGestureFrame::OnGesture, this);
+    myPanel->Bind(wxEVT_LONG_PRESS, &MyGestureFrame::OnGesture, this);
+    myPanel->Bind(wxEVT_PRESS_AND_TAP, &MyGestureFrame::OnGesture, this);
+
+    Bind(wxEVT_CLOSE_WINDOW, &MyGestureFrame::OnQuit, this);
+}
+
+MyGesturePanel::MyGesturePanel(MyGestureFrame *parent)
+    : wxPanel(parent, wxID_ANY),
+      m_bitmap(horse_xpm)
+{
+    SetBackgroundStyle(wxBG_STYLE_PAINT);
+    Bind(wxEVT_PAINT, &MyGesturePanel::OnPaint, this);
+
+    if ( !EnableTouchEvents(wxTOUCH_ALL_GESTURES) )
+    {
+        wxLogError("Failed to enable touch events");
+
+        // Still bind event handlers just in case they still work?
+    }
+
+    // Event handlers
+    Bind(wxEVT_GESTURE_PAN, &MyGesturePanel::OnPan, this);
+    Bind(wxEVT_GESTURE_ZOOM, &MyGesturePanel::OnZoom, this);
+    Bind(wxEVT_GESTURE_ROTATE, &MyGesturePanel::OnRotate, this);
+    Bind(wxEVT_TWO_FINGER_TAP, &MyGesturePanel::OnTwoFingerTap, this);
+    Bind(wxEVT_LONG_PRESS, &MyGesturePanel::OnLongPress, this);
+    Bind(wxEVT_PRESS_AND_TAP, &MyGesturePanel::OnPressAndTap, this);
+
+    m_lastZoomFactor = 1.0;
+}
+
+void MyGestureFrame::OnQuit(wxCloseEvent& WXUNUSED(event))
+{
+    delete wxLog::SetActiveTarget(m_logOld);
+    Destroy();
+}
+
+void MyGestureFrame::OnGesture(wxGestureEvent& event)
+{
+    if ( event.IsGestureStart() )
+        m_logText->Clear();
+
+    event.Skip();
+}
+
+void MyGesturePanel::OnPaint(wxPaintEvent& WXUNUSED(event))
+{
+    wxAutoBufferedPaintDC paintDC(this);
+    paintDC.Clear();
+
+    wxGCDC dc(paintDC);
+    dc.SetTransformMatrix(m_affineMatrix);
+    dc.DrawBitmap(m_bitmap, 0, 0);
+}
+
+void MyGesturePanel::OnPan(wxPanGestureEvent& event)
+{
+    if ( event.IsGestureStart() )
+    {
+        wxLogMessage("Pan gesture started");
+    }
+
+    const wxPoint delta = event.GetDelta();
+    wxLogMessage("Pan gesture performed with delta = (%d,%d), "
+                 "with current position (%d,%d)",
+                 delta.x, delta.y,
+                 event.GetPosition().x, event.GetPosition().y);
+
+    // Transform the distance using the transpose of the matrix,
+    // in order to translate the image to match the screen coordinates
+    wxMatrix2D m;
+    wxPoint2DDouble tr;
+
+    m_affineMatrix.Get(&m, &tr);
+    tr += event.GetDelta();
+    m_affineMatrix.Set(m, tr);
+
+    if ( event.IsGestureEnd() )
+    {
+        wxLogMessage("Pan gesture ended");
+    }
+
+    Refresh();
+}
+
+void MyGesturePanel::OnZoom(wxZoomGestureEvent& event)
+{
+    if ( event.IsGestureStart() )
+    {
+        wxLogMessage("Zoom gesture started");
+
+        m_lastZoomFactor = 1.0;
+        m_lastGesturePos = event.GetPosition();
+    }
+
+    wxLogMessage("Zoom gesture performed with zoom center at (%d, %d) and zoom Factor = %f",
+        event.GetPosition().x, event.GetPosition().y, event.GetZoomFactor());
+
+    const wxPoint &evtPos = event.GetPosition();
+    double factor = event.GetZoomFactor() / m_lastZoomFactor;
+
+    wxMatrix2D m;
+    wxPoint2DDouble tr;
+    m_affineMatrix.Get(&m, &tr);
+
+    tr -= m_lastGesturePos;
+
+    wxAffineMatrix2D inv = m_affineMatrix;
+    inv.Invert();
+    tr = inv.TransformDistance(tr);
+    m_affineMatrix.Scale(factor, factor);
+    tr = m_affineMatrix.TransformDistance(tr);
+
+    tr += evtPos;
+
+    m_affineMatrix.Get(&m, nullptr);
+    m_affineMatrix.Set(m, tr);
+
+    if ( event.IsGestureEnd() )
+    {
+        wxLogMessage("Zoom gesture ended");
+    }
+
+    m_lastZoomFactor = event.GetZoomFactor();
+    m_lastGesturePos = evtPos;
+
+    Refresh();
+}
+
+void MyGesturePanel::OnRotate(wxRotateGestureEvent& event)
+{
+    if ( event.IsGestureStart() )
+    {
+        wxLogMessage("Rotate gesture started");
+
+        m_lastRotationAngle = 0.0;
+    }
+
+    wxLogMessage("Rotate gesture performed with rotation center at (%d, %d) and cumulative rotation angle = %f",
+        event.GetPosition().x, event.GetPosition().y, event.GetRotationAngle());
+
+    const wxPoint& evtPos = event.GetPosition();
+
+    wxMatrix2D m;
+    wxPoint2DDouble tr;
+
+    m_affineMatrix.Get(&m, &tr);
+
+    tr -= evtPos;
+
+    wxAffineMatrix2D inv = m_affineMatrix;
+    inv.Invert();
+    tr = inv.TransformDistance(tr);
+    m_affineMatrix.Rotate(event.GetRotationAngle() - m_lastRotationAngle);
+    tr = m_affineMatrix.TransformDistance(tr);
+
+    tr += evtPos;
+
+    m_affineMatrix.Get(&m, nullptr);
+    m_affineMatrix.Set(m, tr);
+
+    if ( event.IsGestureEnd() )
+    {
+        wxLogMessage("Rotate gesture ended");
+    }
+
+    m_lastRotationAngle = event.GetRotationAngle();
+
+    Refresh();
+}
+
+void MyGesturePanel::OnTwoFingerTap(wxTwoFingerTapEvent& event)
+{
+    if ( event.IsGestureStart() )
+    {
+        wxLogMessage("Two Finger Tap gesture gesture started");
+    }
+
+    wxLogMessage("Two Finger Tap gesture performed at (%d, %d)", event.GetPosition().x, event.GetPosition().y);
+
+    if ( event.IsGestureEnd() )
+    {
+        wxLogMessage("Two Finger Tap gesture ended");
+    }
+}
+
+void MyGesturePanel::OnLongPress(wxLongPressEvent& event)
+{
+    if ( event.IsGestureStart() )
+    {
+        wxLogMessage("Long Press gesture started");
+    }
+
+    wxLogMessage("Long Press gesture performed at (%d,%d)", event.GetPosition().x, event.GetPosition().y);
+
+    if ( event.IsGestureEnd() )
+    {
+        wxLogMessage("Long Press gesture ended");
+    }
+}
+
+void MyGesturePanel::OnPressAndTap(wxPressAndTapEvent& event)
+{
+    if ( event.IsGestureStart() )
+    {
+        wxLogMessage("Press and Tap gesture started");
+    }
+
+    wxLogMessage("Press and Tap gesture performed at (%d,%d)", event.GetPosition().x, event.GetPosition().y);
+
+    if ( event.IsGestureEnd() )
+    {
+        wxLogMessage("Press and Tap gesture ended");
+    }
+}