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#include "gestures.h"
#include "wx/dcgraph.h"
#include "wx/dcbuffer.h"
#include "../image/horse.xpm"
MyGestureFrame::MyGestureFrame()
: wxFrame(NULL, 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, wxRound(m_translateDistance.m_x), wxRound(m_translateDistance.m_y));
}
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;
m_affineMatrix.Get(&m, NULL);
wxPoint2DDouble deltaD(m.m_11 * delta.x + m.m_12 * delta.y,
m.m_21 * delta.x + m.m_22 * delta.y);
// Add it to the total translation
m_translateDistance += deltaD;
if ( event.IsGestureEnd() )
{
wxLogMessage("Pan gesture ended");
}
Refresh();
}
void MyGesturePanel::OnZoom(wxZoomGestureEvent& event)
{
if ( event.IsGestureStart() )
{
wxLogMessage("Zoom gesture started");
m_lastZoomFactor = 1.0;
}
wxLogMessage("Zoom gesture performed with zoom center at (%d, %d) and zoom Factor = %f",
event.GetPosition().x, event.GetPosition().y, event.GetZoomFactor());
const wxPoint& zoomCenter = event.GetPosition();
// Translate to zoom center
m_affineMatrix.Translate(zoomCenter.x, zoomCenter.y);
// Scale
m_affineMatrix.Scale(event.GetZoomFactor() / m_lastZoomFactor, event.GetZoomFactor() / m_lastZoomFactor);
// Translate back
m_affineMatrix.Translate(-zoomCenter.x, -zoomCenter.y);
if ( event.IsGestureEnd() )
{
wxLogMessage("Zoom gesture ended");
}
m_lastZoomFactor = event.GetZoomFactor();
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& rotationCenter = event.GetPosition();
// Translate to rotation center
m_affineMatrix.Translate(rotationCenter.x, rotationCenter.y);
// Rotate
m_affineMatrix.Rotate(event.GetRotationAngle() - m_lastRotationAngle);
// Translate back
m_affineMatrix.Translate(-rotationCenter.x, -rotationCenter.y);
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");
}
}
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