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#include "FreezePointer.h"
#include <wx/window.h>
#include "debugging/debugging.h"
#include "MouseButton.h"
namespace wxutil
{
void FreezePointer::startCapture(wxWindow* window,
const MotionFunction& motionDelta,
const CaptureLostFunction& endMove,
bool freezePointer,
bool hidePointer,
bool motionReceivesDeltas)
{
assert(window);
ASSERT_MESSAGE(motionDelta, "can't capture pointer");
ASSERT_MESSAGE(endMove, "can't capture pointer");
// Store the flags before going ahead
_freezePointer = freezePointer;
_hidePointer = hidePointer;
_motionReceivesDeltas = motionReceivesDeltas;
// Find the toplevel window
wxWindow* topLevel = wxGetTopLevelParent(window);
if (_hidePointer)
{
window->SetCursor(wxCursor(wxCURSOR_BLANK));
}
// We capture the mouse on the toplevel app, coordinates
// are measured relative to the child window
if (!topLevel->HasCapture())
{
topLevel->CaptureMouse();
}
_capturedWindow = window;
wxPoint windowMousePos = _capturedWindow->ScreenToClient(wxGetMousePosition());
_freezePosX = windowMousePos.x;
_freezePosY = windowMousePos.y;
if (_freezePointer)
{
_capturedWindow->WarpPointer(_freezePosX, _freezePosY);
}
_motionFunction = motionDelta;
_captureLostFunction = endMove;
topLevel->Connect(wxEVT_MOTION, wxMouseEventHandler(FreezePointer::onMouseMotion), NULL, this);
topLevel->Connect(wxEVT_LEFT_UP, wxMouseEventHandler(FreezePointer::onMouseUp), NULL, this);
topLevel->Connect(wxEVT_RIGHT_UP, wxMouseEventHandler(FreezePointer::onMouseUp), NULL, this);
topLevel->Connect(wxEVT_MIDDLE_UP, wxMouseEventHandler(FreezePointer::onMouseUp), NULL, this);
topLevel->Connect(wxEVT_LEFT_DOWN, wxMouseEventHandler(FreezePointer::onMouseDown), NULL, this);
topLevel->Connect(wxEVT_RIGHT_DOWN, wxMouseEventHandler(FreezePointer::onMouseDown), NULL, this);
topLevel->Connect(wxEVT_MIDDLE_DOWN, wxMouseEventHandler(FreezePointer::onMouseDown), NULL, this);
topLevel->Connect(wxEVT_MOUSE_CAPTURE_LOST, wxMouseCaptureLostEventHandler(FreezePointer::onMouseCaptureLost), NULL, this);
}
bool FreezePointer::isCapturing(wxWindow* window) const
{
return _capturedWindow != nullptr;
}
void FreezePointer::endCapture()
{
if (!_capturedWindow)
{
return; // safeguard against duplicate unfreeze() calls
}
wxWindow* window = _capturedWindow;
wxWindow* topLevel = wxGetTopLevelParent(window);
_capturedWindow = nullptr;
_motionFunction = MotionFunction();
_captureLostFunction = CaptureLostFunction();
if (_freezePointer)
{
window->WarpPointer(_freezePosX, _freezePosY);
}
if (_hidePointer)
{
window->SetCursor(wxCursor(wxCURSOR_DEFAULT));
}
if (topLevel->HasCapture())
{
topLevel->ReleaseMouse();
}
topLevel->Disconnect(wxEVT_MOUSE_CAPTURE_LOST, wxMouseCaptureLostEventHandler(FreezePointer::onMouseCaptureLost), NULL, this);
topLevel->Disconnect(wxEVT_MOTION, wxMouseEventHandler(FreezePointer::onMouseMotion), NULL, this);
topLevel->Disconnect(wxEVT_LEFT_UP, wxMouseEventHandler(FreezePointer::onMouseUp), NULL, this);
topLevel->Disconnect(wxEVT_RIGHT_UP, wxMouseEventHandler(FreezePointer::onMouseUp), NULL, this);
topLevel->Disconnect(wxEVT_MIDDLE_UP, wxMouseEventHandler(FreezePointer::onMouseUp), NULL, this);
topLevel->Disconnect(wxEVT_LEFT_DOWN, wxMouseEventHandler(FreezePointer::onMouseDown), NULL, this);
topLevel->Disconnect(wxEVT_RIGHT_DOWN, wxMouseEventHandler(FreezePointer::onMouseDown), NULL, this);
topLevel->Disconnect(wxEVT_MIDDLE_DOWN, wxMouseEventHandler(FreezePointer::onMouseDown), NULL, this);
}
void FreezePointer::connectMouseEvents(const MouseEventFunction& onMouseDown,
const MouseEventFunction& onMouseUp)
{
_onMouseUp = onMouseUp;
_onMouseDown = onMouseDown;
}
void FreezePointer::disconnectMouseEvents()
{
_onMouseUp = MouseEventFunction();
_onMouseDown = MouseEventFunction();
}
void FreezePointer::onMouseDown(wxMouseEvent& ev)
{
if (_onMouseDown && _capturedWindow)
{
// The connected mouse up event expects window coordinates,
// not coordinates relative to the captured window
wxMouseEvent copy(ev);
wxPoint windowMousePos = _capturedWindow->ScreenToClient(wxGetMousePosition());
copy.SetX(windowMousePos.x);
copy.SetY(windowMousePos.y);
_onMouseDown(copy);
}
}
void FreezePointer::onMouseUp(wxMouseEvent& ev)
{
if (_onMouseUp && _capturedWindow)
{
// The connected mouse up event expects window coordinates,
// not coordinates relative to the captured window
wxMouseEvent copy(ev);
wxPoint windowMousePos = _capturedWindow->ScreenToClient(wxGetMousePosition());
copy.SetX(windowMousePos.x);
copy.SetY(windowMousePos.y);
_onMouseUp(copy);
}
}
void FreezePointer::onMouseMotion(wxMouseEvent& ev)
{
if (!_capturedWindow) return;
wxPoint windowMousePos = _capturedWindow->ScreenToClient(wxGetMousePosition());
int dx = windowMousePos.x - _freezePosX;
int dy = windowMousePos.y - _freezePosY;
if (dx != 0 || dy != 0)
{
if (_freezePointer)
{
// Force the mouse cursor to stay where it is
_capturedWindow->WarpPointer(_freezePosX, _freezePosY);
}
else
{
// Non-freezing, update the reference point for the next delta
_freezePosX = windowMousePos.x;
_freezePosY = windowMousePos.y;
}
if (_motionFunction)
{
if (_motionReceivesDeltas)
{
_motionFunction(dx, dy, MouseButton::GetStateForMouseEvent(ev));
}
else
{
_motionFunction(windowMousePos.x, windowMousePos.y, MouseButton::GetStateForMouseEvent(ev));
}
}
}
ev.Skip();
}
void FreezePointer::onMouseCaptureLost(wxMouseCaptureLostEvent& ev)
{
if (_captureLostFunction)
{
_captureLostFunction();
}
// Regardless of what the client does, we need to end capture now
endCapture();
}
} // namespace
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