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kicad/common/view/wx_view_controls.cpp

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/*
* This program source code file is part of KiCad, a free EDA CAD application.
*
* Copyright (C) 2012 Torsten Hueter, torstenhtr <at> gmx.de
* Copyright (C) 2013-2015 CERN
* Copyright (C) 2012-2016 KiCad Developers, see AUTHORS.txt for contributors.
*
* @author Tomasz Wlostowski <tomasz.wlostowski@cern.ch>
* @author Maciej Suminski <maciej.suminski@cern.ch>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, you may find one here:
* http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
* or you may search the http://www.gnu.org website for the version 2 license,
* or you may write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include <view/view.h>
#include <view/wx_view_controls.h>
#include <gal/graphics_abstraction_layer.h>
#include <tool/tool_dispatcher.h>
using namespace KIGFX;
const wxEventType WX_VIEW_CONTROLS::EVT_REFRESH_MOUSE = wxNewEventType();
WX_VIEW_CONTROLS::WX_VIEW_CONTROLS( VIEW* aView, wxScrolledCanvas* aParentPanel ) :
VIEW_CONTROLS( aView ), m_state( IDLE ), m_parentPanel( aParentPanel ), m_scrollScale( 1.0, 1.0 )
{
m_parentPanel->Connect( wxEVT_MOTION,
wxMouseEventHandler( WX_VIEW_CONTROLS::onMotion ), NULL, this );
#if wxCHECK_VERSION( 3, 1, 0 ) || defined( USE_OSX_MAGNIFY_EVENT )
m_parentPanel->Connect( wxEVT_MAGNIFY,
wxMouseEventHandler( WX_VIEW_CONTROLS::onMagnify ), NULL, this );
#endif
m_parentPanel->Connect( wxEVT_MOUSEWHEEL,
wxMouseEventHandler( WX_VIEW_CONTROLS::onWheel ), NULL, this );
m_parentPanel->Connect( wxEVT_MIDDLE_UP,
wxMouseEventHandler( WX_VIEW_CONTROLS::onButton ), NULL, this );
m_parentPanel->Connect( wxEVT_MIDDLE_DOWN,
wxMouseEventHandler( WX_VIEW_CONTROLS::onButton ), NULL, this );
m_parentPanel->Connect( wxEVT_LEFT_UP,
wxMouseEventHandler( WX_VIEW_CONTROLS::onButton ), NULL, this );
m_parentPanel->Connect( wxEVT_LEFT_DOWN,
wxMouseEventHandler( WX_VIEW_CONTROLS::onButton ), NULL, this );
#if defined _WIN32 || defined _WIN64
m_parentPanel->Connect( wxEVT_ENTER_WINDOW,
wxMouseEventHandler( WX_VIEW_CONTROLS::onEnter ), NULL, this );
#endif
m_parentPanel->Connect( wxEVT_LEAVE_WINDOW,
wxMouseEventHandler( WX_VIEW_CONTROLS::onLeave ), NULL, this );
m_parentPanel->Connect( wxEVT_SCROLLWIN_THUMBTRACK,
wxScrollWinEventHandler( WX_VIEW_CONTROLS::onScroll ), NULL, this );
m_panTimer.SetOwner( this );
this->Connect( wxEVT_TIMER,
wxTimerEventHandler( WX_VIEW_CONTROLS::onTimer ), NULL, this );
}
void WX_VIEW_CONTROLS::onMotion( wxMouseEvent& aEvent )
{
bool isAutoPanning = false;
if( m_settings.m_autoPanEnabled )
isAutoPanning = handleAutoPanning( aEvent );
if( !isAutoPanning && aEvent.Dragging() )
{
if( m_state == DRAG_PANNING )
{
VECTOR2D d = m_dragStartPoint - VECTOR2D( aEvent.GetX(), aEvent.GetY() );
VECTOR2D delta = m_view->ToWorld( d, false );
m_view->SetCenter( m_lookStartPoint + delta );
aEvent.StopPropagation();
}
}
aEvent.Skip();
}
void WX_VIEW_CONTROLS::onWheel( wxMouseEvent& aEvent )
{
const double wheelPanSpeed = 0.001;
// mousewheelpan disabled:
// wheel + ctrl -> horizontal scrolling;
// wheel + shift -> vertical scrolling;
// wheel -> zooming;
// mousewheelpan enabled:
// wheel -> pan;
// wheel + ctrl -> zooming;
// wheel + shift -> horizontal scrolling.
if( ( !m_settings.m_enableMousewheelPan && ( aEvent.ControlDown() || aEvent.ShiftDown() ) ) ||
( m_settings.m_enableMousewheelPan && !aEvent.ControlDown() ) )
{
// Scrolling
VECTOR2D scrollVec = m_view->ToWorld( m_view->GetScreenPixelSize(), false ) *
( (double) aEvent.GetWheelRotation() * wheelPanSpeed );
int axis = aEvent.GetWheelAxis();
double scrollX = 0.0;
double scrollY = 0.0;
if( m_settings.m_enableMousewheelPan )
{
if ( axis == wxMOUSE_WHEEL_HORIZONTAL || aEvent.ShiftDown() )
scrollX = scrollVec.x;
else
scrollY = -scrollVec.y;
}
else
{
if( aEvent.ControlDown() )
scrollX = -scrollVec.x;
else
scrollY = -scrollVec.y;
}
VECTOR2D delta( scrollX, scrollY );
m_view->SetCenter( m_view->GetCenter() + delta );
}
else
{
// Zooming
wxLongLong timeStamp = wxGetLocalTimeMillis();
double timeDiff = timeStamp.ToDouble() - m_timeStamp.ToDouble();
int rotation = aEvent.GetWheelRotation();
double zoomScale;
#ifdef __WXMAC__
// The following is to support Apple pointer devices (MagicMouse &
// Macbook touchpad), which send events more frequently, but with smaller
// wheel rotation.
//
// It should not break other platforms, but I prefer to be safe than
// sorry. If you find a device that behaves in the same way on another
// platform, feel free to remove #ifdef directives.
if( timeDiff > 0 && timeDiff < 100 && std::abs( rotation ) < 20 )
{
aEvent.Skip();
return;
}
#endif
m_timeStamp = timeStamp;
// Set scaling speed depending on scroll wheel event interval
if( timeDiff < 500 && timeDiff > 0 )
{
zoomScale = 2.05 - timeDiff / 500;
if( rotation < 0 )
zoomScale = 1.0 / zoomScale;
}
else
{
zoomScale = ( rotation > 0 ) ? 1.05 : 1/1.05;
}
if( IsCursorWarpingEnabled() )
{
CenterOnCursor();
m_view->SetScale( m_view->GetScale() * zoomScale );
}
else
{
VECTOR2D anchor = m_view->ToWorld( VECTOR2D( aEvent.GetX(), aEvent.GetY() ) );
m_view->SetScale( m_view->GetScale() * zoomScale, anchor );
}
}
aEvent.Skip();
}
#if wxCHECK_VERSION( 3, 1, 0 ) || defined( USE_OSX_MAGNIFY_EVENT )
void WX_VIEW_CONTROLS::onMagnify( wxMouseEvent& aEvent )
{
// Scale based on the magnification from our underlying magnification event.
VECTOR2D anchor = m_view->ToWorld( VECTOR2D( aEvent.GetX(), aEvent.GetY() ) );
m_view->SetScale( m_view->GetScale() * ( aEvent.GetMagnification() + 1.0f ), anchor );
aEvent.Skip();
}
#endif
void WX_VIEW_CONTROLS::onButton( wxMouseEvent& aEvent )
{
switch( m_state )
{
case IDLE:
case AUTO_PANNING:
if( aEvent.MiddleDown() )
{
m_dragStartPoint = VECTOR2D( aEvent.GetX(), aEvent.GetY() );
m_lookStartPoint = m_view->GetCenter();
m_state = DRAG_PANNING;
}
if( aEvent.LeftUp() )
m_state = IDLE; // Stop autopanning when user release left mouse button
break;
case DRAG_PANNING:
if( aEvent.MiddleUp() )
m_state = IDLE;
break;
}
aEvent.Skip();
}
void WX_VIEW_CONTROLS::onEnter( wxMouseEvent& aEvent )
{
m_parentPanel->SetFocus();
}
void WX_VIEW_CONTROLS::onLeave( wxMouseEvent& aEvent )
{
if( m_settings.m_cursorCaptured )
{
bool warp = false;
int x = aEvent.GetX();
int y = aEvent.GetY();
wxSize parentSize = m_parentPanel->GetClientSize();
if( x < 0 )
{
x = 0;
warp = true;
}
else if( x >= parentSize.x )
{
x = parentSize.x - 1;
warp = true;
}
if( y < 0 )
{
y = 0;
warp = true;
}
else if( y >= parentSize.y )
{
y = parentSize.y - 1;
warp = true;
}
if( warp )
m_parentPanel->WarpPointer( x, y );
}
}
void WX_VIEW_CONTROLS::onTimer( wxTimerEvent& aEvent )
{
switch( m_state )
{
case AUTO_PANNING:
{
if ( !m_settings.m_autoPanEnabled )
{
m_state = IDLE;
return;
}
#if wxCHECK_VERSION( 3, 0, 0 )
if( !m_parentPanel->HasFocus() )
break;
#endif
double borderSize = std::min( m_settings.m_autoPanMargin * m_view->GetScreenPixelSize().x,
m_settings.m_autoPanMargin * m_view->GetScreenPixelSize().y );
VECTOR2D dir( m_panDirection );
if( dir.EuclideanNorm() > borderSize )
dir = dir.Resize( borderSize );
dir = m_view->ToWorld( dir, false );
m_view->SetCenter( m_view->GetCenter() + dir * m_settings.m_autoPanSpeed );
// Notify tools that the cursor position has changed in the world coordinates
wxMouseEvent moveEvent( EVT_REFRESH_MOUSE );
// Set the modifiers state
#if wxCHECK_VERSION( 3, 0, 0 )
moveEvent.SetControlDown( wxGetKeyState( WXK_CONTROL ) );
moveEvent.SetShiftDown( wxGetKeyState( WXK_SHIFT ) );
moveEvent.SetAltDown( wxGetKeyState( WXK_ALT ) );
#else
// wx <3.0 do not have accessors, but the fields are exposed
moveEvent.m_controlDown = wxGetKeyState( WXK_CONTROL );
moveEvent.m_shiftDown = wxGetKeyState( WXK_SHIFT );
moveEvent.m_altDown = wxGetKeyState( WXK_ALT );
#endif
wxPostEvent( m_parentPanel, moveEvent );
}
break;
case IDLE: // Just remove unnecessary warnings
case DRAG_PANNING:
break;
}
}
void WX_VIEW_CONTROLS::onScroll( wxScrollWinEvent& aEvent )
{
VECTOR2D center = m_view->GetCenter();
const BOX2I& boundary = m_view->GetBoundary();
if( aEvent.GetOrientation() == wxHORIZONTAL )
center.x = boundary.GetLeft() + aEvent.GetPosition() / m_scrollScale.x;
else if( aEvent.GetOrientation() == wxVERTICAL )
center.y = boundary.GetTop() + aEvent.GetPosition() / m_scrollScale.y;
m_view->SetCenter( center );
m_parentPanel->Refresh();
}
void WX_VIEW_CONTROLS::SetGrabMouse( bool aEnabled )
{
if( aEnabled && !m_settings.m_grabMouse )
m_parentPanel->CaptureMouse();
else if( !aEnabled && m_settings.m_grabMouse )
m_parentPanel->ReleaseMouse();
VIEW_CONTROLS::SetGrabMouse( aEnabled );
}
VECTOR2D WX_VIEW_CONTROLS::GetMousePosition( bool aWorldCoordinates ) const
{
wxPoint msp = wxGetMousePosition();
wxPoint winp = m_parentPanel->GetScreenPosition();
VECTOR2D screenPos( msp.x - winp.x, msp.y - winp.y );
return aWorldCoordinates ? m_view->ToWorld( screenPos ) : screenPos;
}
VECTOR2D WX_VIEW_CONTROLS::GetCursorPosition( bool aEnableSnapping ) const
{
if( m_settings.m_forceCursorPosition )
{
return m_settings.m_forcedPosition;
}
else
{
VECTOR2D mousePosition = GetMousePosition();
if( aEnableSnapping )
return m_view->GetGAL()->GetGridPoint( mousePosition );
else
return mousePosition;
}
}
void WX_VIEW_CONTROLS::WarpCursor( const VECTOR2D& aPosition, bool aWorldCoordinates,
bool aWarpView ) const
{
if( aWorldCoordinates )
{
const VECTOR2I& screenSize = m_view->GetGAL()->GetScreenPixelSize();
BOX2I screen( VECTOR2I( 0, 0 ), screenSize );
VECTOR2D screenPos = m_view->ToScreen( aPosition );
if( !screen.Contains( screenPos ) )
{
if( aWarpView )
{
m_view->SetCenter( aPosition );
m_parentPanel->WarpPointer( screenSize.x / 2, screenSize.y / 2 );
}
}
else
{
m_parentPanel->WarpPointer( screenPos.x, screenPos.y );
}
}
else
{
m_parentPanel->WarpPointer( aPosition.x, aPosition.y );
}
}
void WX_VIEW_CONTROLS::CenterOnCursor() const
{
const VECTOR2I& screenSize = m_view->GetGAL()->GetScreenPixelSize();
VECTOR2I screenCenter( screenSize / 2 );
if( GetMousePosition( false ) != screenCenter )
{
m_view->SetCenter( GetCursorPosition() );
m_parentPanel->WarpPointer( KiROUND( screenSize.x / 2 ), KiROUND( screenSize.y / 2 ) );
}
}
bool WX_VIEW_CONTROLS::handleAutoPanning( const wxMouseEvent& aEvent )
{
VECTOR2D p( aEvent.GetX(), aEvent.GetY() );
// Compute areas where autopanning is active
double borderStart = std::min( m_settings.m_autoPanMargin * m_view->GetScreenPixelSize().x,
m_settings.m_autoPanMargin * m_view->GetScreenPixelSize().y );
double borderEndX = m_view->GetScreenPixelSize().x - borderStart;
double borderEndY = m_view->GetScreenPixelSize().y - borderStart;
if( p.x < borderStart )
m_panDirection.x = -( borderStart - p.x );
else if( p.x > borderEndX )
m_panDirection.x = ( p.x - borderEndX );
else
m_panDirection.x = 0;
if( p.y < borderStart )
m_panDirection.y = -( borderStart - p.y );
else if( p.y > borderEndY )
m_panDirection.y = ( p.y - borderEndY );
else
m_panDirection.y = 0;
bool borderHit = ( m_panDirection.x != 0 || m_panDirection.y != 0 );
switch( m_state )
{
case AUTO_PANNING:
if( !borderHit )
{
m_panTimer.Stop();
m_state = IDLE;
return false;
}
return true;
break;
case IDLE:
if( borderHit )
{
m_state = AUTO_PANNING;
m_panTimer.Start( (int) ( 250.0 / 60.0 ) );
return true;
}
return false;
break;
case DRAG_PANNING:
return false;
}
wxASSERT_MSG( false, wxT( "This line should never be reached" ) );
return false; // Should not be reached, just avoid the compiler warnings..
}
void WX_VIEW_CONTROLS::UpdateScrollbars()
{
const BOX2D viewport = m_view->GetViewport();
const BOX2I& boundary = m_view->GetBoundary();
m_scrollScale.x = 2e3 / viewport.GetWidth(); // TODO it does not have to be updated so often
m_scrollScale.y = 2e3 / viewport.GetHeight();
VECTOR2I newScroll( ( viewport.Centre().x - boundary.GetLeft() ) * m_scrollScale.x,
( viewport.Centre().y - boundary.GetTop() ) * m_scrollScale.y );
// Adjust scrollbars only if it is needed. Otherwise there are cases when canvas is continuosly
// refreshed (Windows)
if( m_scrollPos != newScroll )
{
// Another example of wxWidgets being broken by design: scroll position is determined by the
// left (or top, if vertical) edge of the slider. Fortunately, slider size seems to be constant
// (at least for wxGTK and wxMSW), so we have to add its size to allow user to scroll the workspace
// till the end.
m_parentPanel->SetScrollbars( 1, 1,
#if defined(__LINUX__)
m_scrollScale.x * boundary.GetWidth() + 1623, m_scrollScale.y * boundary.GetHeight() + 1623,
#elif defined(__WIN32__) || defined(__WIN64__)
m_scrollScale.x * boundary.GetWidth() + 1377, m_scrollScale.y * boundary.GetHeight() + 741,
#else
m_scrollScale.x * boundary.GetWidth(), m_scrollScale.y * boundary.GetHeight(),
#endif
newScroll.x, newScroll.y, false );
m_scrollPos = newScroll;
}
}
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