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kicad-source/common/view/wx_view_controls.cpp
John Beard ce758adca3 Enable horizontal scroll panning 
Allow a horizontal scroll event to fall through to the panning branch.

This still restricts zooming to use only the vertical axis, but it
(re-?)enables the horizontal pan function that currently doesn't work
even if the user has set "allow horizontal panning", as the horizontal
scroll doesn't have a modifier, which is the default for vertical scroll
zoom, and thus it skips over the whole panning branch.

If the user has not set horizontal panning, the earlier early return
means that there is no handling of any horizontal scroll event, so this
won't change anything for these users.
2024-05-20 19:23:23 +08:00

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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) 2012-2022 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 <pgm_base.h>
#include <core/profile.h>
#include <view/view.h>
#include <view/wx_view_controls.h>
#include <view/zoom_controller.h>
#include <gal/graphics_abstraction_layer.h>
#include <tool/tool_dispatcher.h>
#include <trace_helpers.h>
#include <settings/common_settings.h>
#include <math/util.h> // for KiROUND
#include <geometry/geometry_utils.h>
#include <widgets/ui_common.h>
#include <class_draw_panel_gal.h>
#include <eda_draw_frame.h>
#include <kiway.h>
#include <kiplatform/ui.h>
#include <wx/log.h>
#ifdef __WXMSW__
#define USE_MOUSE_CAPTURE
#endif
using namespace KIGFX;
const wxEventType WX_VIEW_CONTROLS::EVT_REFRESH_MOUSE = wxNewEventType();
static std::unique_ptr<ZOOM_CONTROLLER> GetZoomControllerForPlatform( bool aAcceleration )
{
#ifdef __WXMAC__
// On Apple pointer devices, wheel events occur frequently and with
// smaller rotation values. For those devices, let's handle zoom
// based on the rotation amount rather than the time difference.
return std::make_unique<CONSTANT_ZOOM_CONTROLLER>( CONSTANT_ZOOM_CONTROLLER::MAC_SCALE );
#elif __WXGTK3__
// GTK3 is similar, but the scale constant is smaller
return std::make_unique<CONSTANT_ZOOM_CONTROLLER>( CONSTANT_ZOOM_CONTROLLER::GTK3_SCALE );
#else
if( aAcceleration )
return std::make_unique<ACCELERATING_ZOOM_CONTROLLER>();
else
return std::make_unique<CONSTANT_ZOOM_CONTROLLER>( CONSTANT_ZOOM_CONTROLLER::MSW_SCALE );
#endif
}
WX_VIEW_CONTROLS::WX_VIEW_CONTROLS( VIEW* aView, EDA_DRAW_PANEL_GAL* aParentPanel ) :
VIEW_CONTROLS( aView ),
m_state( IDLE ),
m_parentPanel( aParentPanel ),
m_scrollScale( 1.0, 1.0 ),
#ifdef __WXGTK3__
m_lastTimestamp( 0 ),
#endif
m_cursorPos( 0, 0 ),
m_updateCursor( true ),
m_infinitePanWorks( false )
{
LoadSettings();
m_MotionEventCounter = std::make_unique<PROF_COUNTER>( "Mouse motion events" );
m_parentPanel->Connect( wxEVT_MOTION,
wxMouseEventHandler( WX_VIEW_CONTROLS::onMotion ), nullptr, this );
m_parentPanel->Connect( wxEVT_MAGNIFY,
wxMouseEventHandler( WX_VIEW_CONTROLS::onMagnify ), nullptr, this );
m_parentPanel->Connect( wxEVT_MOUSEWHEEL,
wxMouseEventHandler( WX_VIEW_CONTROLS::onWheel ), nullptr, this );
m_parentPanel->Connect( wxEVT_MIDDLE_UP,
wxMouseEventHandler( WX_VIEW_CONTROLS::onButton ), nullptr, this );
m_parentPanel->Connect( wxEVT_MIDDLE_DOWN,
wxMouseEventHandler( WX_VIEW_CONTROLS::onButton ), nullptr, this );
m_parentPanel->Connect( wxEVT_LEFT_UP,
wxMouseEventHandler( WX_VIEW_CONTROLS::onButton ), nullptr, this );
m_parentPanel->Connect( wxEVT_LEFT_DOWN,
wxMouseEventHandler( WX_VIEW_CONTROLS::onButton ), nullptr, this );
m_parentPanel->Connect( wxEVT_RIGHT_UP,
wxMouseEventHandler( WX_VIEW_CONTROLS::onButton ), nullptr, this );
m_parentPanel->Connect( wxEVT_RIGHT_DOWN,
wxMouseEventHandler( WX_VIEW_CONTROLS::onButton ), nullptr, this );
#if defined __WXMSW__
m_parentPanel->Connect( wxEVT_ENTER_WINDOW,
wxMouseEventHandler( WX_VIEW_CONTROLS::onEnter ), nullptr, this );
#endif
m_parentPanel->Connect( wxEVT_LEAVE_WINDOW,
wxMouseEventHandler( WX_VIEW_CONTROLS::onLeave ), nullptr, this );
m_parentPanel->Connect( wxEVT_SCROLLWIN_THUMBTRACK,
wxScrollWinEventHandler( WX_VIEW_CONTROLS::onScroll ), nullptr, this );
m_parentPanel->Connect( wxEVT_SCROLLWIN_PAGEUP,
wxScrollWinEventHandler( WX_VIEW_CONTROLS::onScroll ), nullptr, this );
m_parentPanel->Connect( wxEVT_SCROLLWIN_PAGEDOWN,
wxScrollWinEventHandler( WX_VIEW_CONTROLS::onScroll ), nullptr, this );
m_parentPanel->Connect( wxEVT_SCROLLWIN_BOTTOM,
wxScrollWinEventHandler( WX_VIEW_CONTROLS::onScroll ), nullptr, this );
m_parentPanel->Connect( wxEVT_SCROLLWIN_TOP,
wxScrollWinEventHandler( WX_VIEW_CONTROLS::onScroll ), nullptr, this );
m_parentPanel->Connect( wxEVT_SCROLLWIN_LINEUP,
wxScrollWinEventHandler( WX_VIEW_CONTROLS::onScroll ), nullptr, this );
m_parentPanel->Connect( wxEVT_SCROLLWIN_LINEDOWN,
wxScrollWinEventHandler( WX_VIEW_CONTROLS::onScroll ), nullptr, this );
#if defined USE_MOUSE_CAPTURE
m_parentPanel->Connect( wxEVT_MOUSE_CAPTURE_LOST,
wxMouseEventHandler( WX_VIEW_CONTROLS::onCaptureLost ), nullptr, this );
#endif
m_cursorWarped = false;
m_panTimer.SetOwner( this );
this->Connect( wxEVT_TIMER, wxTimerEventHandler( WX_VIEW_CONTROLS::onTimer ), nullptr, this );
m_settings.m_lastKeyboardCursorPositionValid = false;
m_settings.m_lastKeyboardCursorPosition = { 0.0, 0.0 };
m_settings.m_lastKeyboardCursorCommand = 0;
}
WX_VIEW_CONTROLS::~WX_VIEW_CONTROLS()
{
#if defined USE_MOUSE_CAPTURE
if( m_parentPanel->HasCapture() )
m_parentPanel->ReleaseMouse();
#endif
}
void WX_VIEW_CONTROLS::LoadSettings()
{
COMMON_SETTINGS* cfg = Pgm().GetCommonSettings();
m_settings.m_warpCursor = cfg->m_Input.center_on_zoom;
m_settings.m_focusFollowSchPcb = cfg->m_Input.focus_follow_sch_pcb;
m_settings.m_autoPanSettingEnabled = cfg->m_Input.auto_pan;
m_settings.m_autoPanAcceleration = cfg->m_Input.auto_pan_acceleration;
m_settings.m_horizontalPan = cfg->m_Input.horizontal_pan;
m_settings.m_zoomAcceleration = cfg->m_Input.zoom_acceleration;
m_settings.m_zoomSpeed = cfg->m_Input.zoom_speed;
m_settings.m_zoomSpeedAuto = cfg->m_Input.zoom_speed_auto;
m_settings.m_scrollModifierZoom = cfg->m_Input.scroll_modifier_zoom;
m_settings.m_scrollModifierPanH = cfg->m_Input.scroll_modifier_pan_h;
m_settings.m_scrollModifierPanV = cfg->m_Input.scroll_modifier_pan_v;
m_settings.m_dragLeft = cfg->m_Input.drag_left;
m_settings.m_dragMiddle = cfg->m_Input.drag_middle;
m_settings.m_dragRight = cfg->m_Input.drag_right;
m_settings.m_scrollReversePanH = cfg->m_Input.reverse_scroll_pan_h;
m_zoomController.reset();
if( cfg->m_Input.zoom_speed_auto )
{
m_zoomController = GetZoomControllerForPlatform( cfg->m_Input.zoom_acceleration );
}
else
{
if( cfg->m_Input.zoom_acceleration )
{
m_zoomController =
std::make_unique<ACCELERATING_ZOOM_CONTROLLER>( cfg->m_Input.zoom_speed );
}
else
{
double scale = CONSTANT_ZOOM_CONTROLLER::MANUAL_SCALE_FACTOR * cfg->m_Input.zoom_speed;
m_zoomController = std::make_unique<CONSTANT_ZOOM_CONTROLLER>( scale );
}
}
}
void WX_VIEW_CONTROLS::onMotion( wxMouseEvent& aEvent )
{
( *m_MotionEventCounter )++;
// Because Weston sends a motion event to previous location after warping the pointer
wxPoint mouseRel = m_parentPanel->ScreenToClient( KIPLATFORM::UI::GetMousePosition() );
bool isAutoPanning = false;
int x = mouseRel.x;
int y = mouseRel.y;
VECTOR2D mousePos( x, y );
// Automatic focus switching between SCH and PCB windows on canvas mouse motion
if( m_settings.m_focusFollowSchPcb )
{
if( EDA_DRAW_FRAME* frame = m_parentPanel->GetParentEDAFrame() )
{
KIWAY_PLAYER* otherFrame = nullptr;
if( frame->IsType( FRAME_PCB_EDITOR ) )
{
otherFrame = frame->Kiway().Player( FRAME_SCH, false );
}
else if( frame->IsType( FRAME_SCH ) )
{
otherFrame = frame->Kiway().Player( FRAME_PCB_EDITOR, false );
}
if( otherFrame && KIPLATFORM::UI::IsWindowActive( otherFrame )
&& !KIPLATFORM::UI::IsWindowActive( frame ) )
{
frame->Raise();
}
}
}
if( m_state != DRAG_PANNING && m_state != DRAG_ZOOMING )
handleCursorCapture( x, y );
if( m_settings.m_autoPanEnabled && m_settings.m_autoPanSettingEnabled )
isAutoPanning = handleAutoPanning( aEvent );
if( !isAutoPanning && aEvent.Dragging() )
{
if( m_state == DRAG_PANNING )
{
static bool justWarped = false;
int warpX = 0;
int warpY = 0;
wxSize parentSize = m_parentPanel->GetClientSize();
if( x < 0 )
{
warpX = parentSize.x;
}
else if(x >= parentSize.x )
{
warpX = -parentSize.x;
}
if( y < 0 )
{
warpY = parentSize.y;
}
else if( y >= parentSize.y )
{
warpY = -parentSize.y;
}
if( !justWarped )
{
VECTOR2D d = m_dragStartPoint - mousePos;
m_dragStartPoint = mousePos;
VECTOR2D delta = m_view->ToWorld( d, false );
m_view->SetCenter( m_view->GetCenter() + delta );
aEvent.StopPropagation();
}
if( warpX || warpY )
{
if( !justWarped )
{
if( m_infinitePanWorks
&& KIPLATFORM::UI::WarpPointer( m_parentPanel, x + warpX, y + warpY ) )
{
m_dragStartPoint += VECTOR2D( warpX, warpY );
justWarped = true;
}
}
else
justWarped = false;
}
else
justWarped = false;
}
else if( m_state == DRAG_ZOOMING )
{
static bool justWarped = false;
int warpY = 0;
wxSize parentSize = m_parentPanel->GetClientSize();
if( y < 0 )
{
warpY = parentSize.y;
}
else if( y >= parentSize.y )
{
warpY = -parentSize.y;
}
if( !justWarped )
{
VECTOR2D d = m_dragStartPoint - mousePos;
m_dragStartPoint = mousePos;
double scale = exp( d.y * m_settings.m_zoomSpeed * 0.001 );
wxLogTrace( traceZoomScroll, wxString::Format( "dy: %f scale: %f", d.y, scale ) );
m_view->SetScale( m_view->GetScale() * scale, m_view->ToWorld( m_zoomStartPoint ) );
aEvent.StopPropagation();
}
if( warpY )
{
if( !justWarped )
{
KIPLATFORM::UI::WarpPointer( m_parentPanel, x, y + warpY );
m_dragStartPoint += VECTOR2D( 0, warpY );
justWarped = true;
}
else
justWarped = false;
}
else
justWarped = false;
}
}
if( m_updateCursor ) // do not update the cursor position if it was explicitly set
m_cursorPos = GetClampedCoords( m_view->ToWorld( mousePos ) );
else
m_updateCursor = true;
aEvent.Skip();
}
void WX_VIEW_CONTROLS::onWheel( wxMouseEvent& aEvent )
{
#ifdef __WXGTK3__
if( aEvent.GetTimestamp() == m_lastTimestamp )
{
aEvent.Skip( false );
return;
}
m_lastTimestamp = aEvent.GetTimestamp();
#endif
const double wheelPanSpeed = 0.001;
const int axis = aEvent.GetWheelAxis();
if( axis == wxMOUSE_WHEEL_HORIZONTAL && !m_settings.m_horizontalPan )
return;
// Pick the modifier, if any. Shift beats control beats alt, we don't support more than one.
int modifiers =
aEvent.ShiftDown() ? WXK_SHIFT :
( aEvent.ControlDown() ? WXK_CONTROL : ( aEvent.AltDown() ? WXK_ALT : 0 ) );
// Restrict zoom handling to the vertical axis, otherwise horizontal
// scrolling events (e.g. touchpads and some mice) end up interpreted
// as vertical scroll events and confuse the user.
if( modifiers == m_settings.m_scrollModifierZoom && axis == wxMOUSE_WHEEL_VERTICAL )
{
const int rotation = aEvent.GetWheelRotation();
const double zoomScale = m_zoomController->GetScaleForRotation( rotation );
if( IsCursorWarpingEnabled() )
{
CenterOnCursor();
m_view->SetScale( m_view->GetScale() * zoomScale );
}
else
{
const VECTOR2D anchor = m_view->ToWorld( VECTOR2D( aEvent.GetX(), aEvent.GetY() ) );
m_view->SetScale( m_view->GetScale() * zoomScale, anchor );
}
// Refresh the zoom level and mouse position on message panel
// (mouse position has not changed, only the zoom level has changed):
refreshMouse( true );
}
else
{
// Scrolling
VECTOR2D scrollVec = m_view->ToWorld( m_view->GetScreenPixelSize(), false ) *
( (double) aEvent.GetWheelRotation() * wheelPanSpeed );
double scrollX = 0.0;
double scrollY = 0.0;
bool hReverse = false;
if( axis != wxMOUSE_WHEEL_HORIZONTAL )
hReverse = m_settings.m_scrollReversePanH;
if( axis == wxMOUSE_WHEEL_HORIZONTAL || modifiers == m_settings.m_scrollModifierPanH )
{
if( hReverse )
scrollX = scrollVec.x;
else
scrollX = ( axis == wxMOUSE_WHEEL_HORIZONTAL ) ? scrollVec.x : -scrollVec.x;
}
else
{
scrollY = -scrollVec.y;
}
VECTOR2D delta( scrollX, scrollY );
m_view->SetCenter( m_view->GetCenter() + delta );
refreshMouse( true );
}
// Do not skip this event, otherwise wxWidgets will fire
// 3 wxEVT_SCROLLWIN_LINEUP or wxEVT_SCROLLWIN_LINEDOWN (normal wxWidgets behavior)
// and we do not want that.
}
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();
}
void WX_VIEW_CONTROLS::setState( STATE aNewState )
{
m_state = aNewState;
}
void WX_VIEW_CONTROLS::onButton( wxMouseEvent& aEvent )
{
switch( m_state )
{
case IDLE:
case AUTO_PANNING:
if( ( aEvent.MiddleDown() && m_settings.m_dragMiddle == MOUSE_DRAG_ACTION::PAN ) ||
( aEvent.RightDown() && m_settings.m_dragRight == MOUSE_DRAG_ACTION::PAN ) )
{
m_dragStartPoint = VECTOR2D( aEvent.GetX(), aEvent.GetY() );
setState( DRAG_PANNING );
m_infinitePanWorks = KIPLATFORM::UI::InfiniteDragPrepareWindow( m_parentPanel );
#if defined USE_MOUSE_CAPTURE
if( !m_parentPanel->HasCapture() )
m_parentPanel->CaptureMouse();
#endif
}
else if( ( aEvent.MiddleDown() && m_settings.m_dragMiddle == MOUSE_DRAG_ACTION::ZOOM ) ||
( aEvent.RightDown() && m_settings.m_dragRight == MOUSE_DRAG_ACTION::ZOOM ) )
{
m_dragStartPoint = VECTOR2D( aEvent.GetX(), aEvent.GetY() );
m_zoomStartPoint = m_dragStartPoint;
setState( DRAG_ZOOMING );
#if defined USE_MOUSE_CAPTURE
if( !m_parentPanel->HasCapture() )
m_parentPanel->CaptureMouse();
#endif
}
if( aEvent.LeftUp() )
setState( IDLE ); // Stop autopanning when user release left mouse button
break;
case DRAG_ZOOMING:
case DRAG_PANNING:
if( aEvent.MiddleUp() || aEvent.LeftUp() || aEvent.RightUp() )
{
setState( IDLE );
KIPLATFORM::UI::InfiniteDragReleaseWindow();
#if defined USE_MOUSE_CAPTURE
if( !m_settings.m_cursorCaptured && m_parentPanel->HasCapture() )
m_parentPanel->ReleaseMouse();
#endif
}
break;
}
aEvent.Skip();
}
void WX_VIEW_CONTROLS::onEnter( wxMouseEvent& aEvent )
{
// Avoid stealing focus from text controls
// This is particularly important for users using On-Screen-Keyboards
// They may move the mouse over the canvas to reach the keyboard
if( KIUI::IsInputControlFocused() )
{
return;
}
#if defined( _WIN32 ) || defined( __WXGTK__ )
// Win32 and some *nix WMs transmit mouse move and wheel events to all controls below the mouse regardless
// of focus. Forcing the focus here will cause the EDA FRAMES to immediately become the
// top level active window.
if( m_parentPanel->GetParent() != nullptr )
{
// this assumes the parent panel's parent is the eda window
if( KIPLATFORM::UI::IsWindowActive( m_parentPanel->GetParent() ) )
{
m_parentPanel->SetFocus();
}
}
#else
m_parentPanel->SetFocus();
#endif
}
void WX_VIEW_CONTROLS::onLeave( wxMouseEvent& aEvent )
{
#if !defined USE_MOUSE_CAPTURE
onMotion( aEvent );
#endif
}
void WX_VIEW_CONTROLS::onCaptureLost( wxMouseEvent& aEvent )
{
// This method must be present to suppress the capture-lost assertion
// Set the flag to allow calling m_parentPanel->CaptureMouse()
// Note: One cannot call m_parentPanel->CaptureMouse() twice, this is not accepted
// by wxWidgets (MSW specific) so we need this guard
m_parentPanel->m_MouseCapturedLost = true;
}
void WX_VIEW_CONTROLS::onTimer( wxTimerEvent& aEvent )
{
switch( m_state )
{
case AUTO_PANNING:
{
if( !m_settings.m_autoPanEnabled )
{
setState( IDLE );
return;
}
#ifdef __WXMSW__
// Hackfix: It's possible for the mouse to leave the canvas
// without triggering any leave events on windows
// Use a MSW only wx function
if( !m_parentPanel->IsMouseInWindow() )
{
m_panTimer.Stop();
setState( IDLE );
return;
}
#endif
if( !m_parentPanel->HasFocus() && !m_parentPanel->StatusPopupHasFocus() )
{
setState( IDLE );
return;
}
double borderSize = std::min( m_settings.m_autoPanMargin * m_view->GetScreenPixelSize().x,
m_settings.m_autoPanMargin * m_view->GetScreenPixelSize().y );
// When the mouse cursor is outside the area with no pan,
// m_panDirection is the dist to this area limit ( in pixels )
// It will be used also as pan value (the pan speed depends on this dist).
VECTOR2D dir( m_panDirection );
// When the mouse cursor is outside the area with no pan, the pan value
// is accelerated depending on the dist between the area and the cursor
float accel = 0.5f + ( m_settings.m_autoPanAcceleration / 5.0f );
// For a small mouse cursor dist to area, just use the distance.
// But for a dist > borderSize / 2, use an accelerated pan value
if( dir.EuclideanNorm() >= borderSize ) // far from area limits
dir = dir.Resize( borderSize * accel );
else if( dir.EuclideanNorm() > borderSize / 2 ) // Near from area limits
dir = dir.Resize( borderSize );
dir = m_view->ToWorld( dir, false );
m_view->SetCenter( m_view->GetCenter() + dir );
refreshMouse( true );
m_panTimer.Start();
}
break;
case IDLE: // Just remove unnecessary warnings
case DRAG_PANNING:
case DRAG_ZOOMING:
break;
}
}
void WX_VIEW_CONTROLS::onScroll( wxScrollWinEvent& aEvent )
{
const double linePanDelta = 0.05;
const double pagePanDelta = 0.5;
int type = aEvent.GetEventType();
int dir = aEvent.GetOrientation();
if( type == wxEVT_SCROLLWIN_THUMBTRACK )
{
auto center = m_view->GetCenter();
const auto& boundary = m_view->GetBoundary();
// Flip scroll direction in flipped view
const double xstart = ( m_view->IsMirroredX() ?
boundary.GetRight() : boundary.GetLeft() );
const double xdelta = ( m_view->IsMirroredX() ? -1 : 1 );
if( dir == wxHORIZONTAL )
center.x = xstart + xdelta * ( aEvent.GetPosition() / m_scrollScale.x );
else
center.y = boundary.GetTop() + aEvent.GetPosition() / m_scrollScale.y;
m_view->SetCenter( center );
}
else if( type == wxEVT_SCROLLWIN_THUMBRELEASE ||
type == wxEVT_SCROLLWIN_TOP ||
type == wxEVT_SCROLLWIN_BOTTOM )
{
// Do nothing on thumb release, we don't care about it.
// We don't have a concept of top or bottom in our viewport, so ignore those events.
}
else
{
double dist = 0;
if( type == wxEVT_SCROLLWIN_PAGEUP )
{
dist = pagePanDelta;
}
else if( type == wxEVT_SCROLLWIN_PAGEDOWN )
{
dist = -pagePanDelta;
}
else if( type == wxEVT_SCROLLWIN_LINEUP )
{
dist = linePanDelta;
}
else if( type == wxEVT_SCROLLWIN_LINEDOWN )
{
dist = -linePanDelta;
}
else
{
wxCHECK_MSG( false, /* void */, wxT( "Unhandled event type" ) );
}
VECTOR2D scroll = m_view->ToWorld( m_view->GetScreenPixelSize(), false ) * dist;
double scrollX = 0.0;
double scrollY = 0.0;
if ( dir == wxHORIZONTAL )
scrollX = -scroll.x;
else
scrollY = -scroll.y;
VECTOR2D delta( scrollX, scrollY );
m_view->SetCenter( m_view->GetCenter() + delta );
}
m_parentPanel->Refresh();
}
void WX_VIEW_CONTROLS::CaptureCursor( bool aEnabled )
{
#if defined USE_MOUSE_CAPTURE
// Note: for some reason, m_parentPanel->HasCapture() can be false even if CaptureMouse()
// was called (i.e. mouse was captured, so when need to test m_MouseCapturedLost to be
// sure a wxEVT_MOUSE_CAPTURE_LOST event was fired before. Otherwise wxMSW complains
if( aEnabled && !m_parentPanel->HasCapture() && m_parentPanel->m_MouseCapturedLost )
{
m_parentPanel->CaptureMouse();
// Clear the flag to allow calling m_parentPanel->CaptureMouse()
// Calling it without calling ReleaseMouse() is not accepted by wxWidgets (MSW specific)
m_parentPanel->m_MouseCapturedLost = false;
}
else if( !aEnabled && m_parentPanel->HasCapture()
&& m_state != DRAG_PANNING && m_state != DRAG_ZOOMING )
{
m_parentPanel->ReleaseMouse();
// Mouse is released, calling CaptureMouse() is allowed now:
m_parentPanel->m_MouseCapturedLost = true;
}
#endif
VIEW_CONTROLS::CaptureCursor( aEnabled );
}
void WX_VIEW_CONTROLS::CancelDrag()
{
if( m_state == DRAG_PANNING || m_state == DRAG_ZOOMING )
{
setState( IDLE );
#if defined USE_MOUSE_CAPTURE
if( !m_settings.m_cursorCaptured && m_parentPanel->HasCapture() )
m_parentPanel->ReleaseMouse();
#endif
}
}
VECTOR2D WX_VIEW_CONTROLS::GetMousePosition( bool aWorldCoordinates ) const
{
wxPoint msp = getMouseScreenPosition();
VECTOR2D screenPos( msp.x, msp.y );
return aWorldCoordinates ? GetClampedCoords( m_view->ToWorld( screenPos ) ) : screenPos;
}
VECTOR2D WX_VIEW_CONTROLS::GetRawCursorPosition( bool aEnableSnapping ) const
{
GAL* gal = m_view->GetGAL();
if( aEnableSnapping && gal->GetGridSnapping() )
{
return gal->GetGridPoint( m_cursorPos );
}
else
{
return m_cursorPos;
}
}
VECTOR2D WX_VIEW_CONTROLS::GetCursorPosition( bool aEnableSnapping ) const
{
if( m_settings.m_forceCursorPosition )
{
return m_settings.m_forcedPosition;
}
else
{
return GetClampedCoords( GetRawCursorPosition( aEnableSnapping ) );
}
}
void WX_VIEW_CONTROLS::SetCursorPosition( const VECTOR2D& aPosition, bool aWarpView,
bool aTriggeredByArrows, long aArrowCommand )
{
m_updateCursor = false;
VECTOR2D clampedPosition = GetClampedCoords( aPosition );
if( aTriggeredByArrows )
{
m_settings.m_lastKeyboardCursorPositionValid = true;
m_settings.m_lastKeyboardCursorPosition = clampedPosition;
m_settings.m_lastKeyboardCursorCommand = aArrowCommand;
m_cursorWarped = false;
}
else
{
m_settings.m_lastKeyboardCursorPositionValid = false;
m_settings.m_lastKeyboardCursorPosition = { 0.0, 0.0 };
m_settings.m_lastKeyboardCursorCommand = 0;
m_cursorWarped = true;
}
WarpMouseCursor( clampedPosition, true, aWarpView );
m_cursorPos = clampedPosition;
}
void WX_VIEW_CONTROLS::SetCrossHairCursorPosition( const VECTOR2D& aPosition,
bool aWarpView = true )
{
m_updateCursor = false;
VECTOR2D clampedPosition = GetClampedCoords( aPosition );
const VECTOR2I& screenSize = m_view->GetGAL()->GetScreenPixelSize();
BOX2I screen( VECTOR2I( 0, 0 ), screenSize );
VECTOR2D screenPos = m_view->ToScreen( clampedPosition );
if( aWarpView && !screen.Contains( screenPos ) )
m_view->SetCenter( clampedPosition );
m_cursorPos = clampedPosition;
}
void WX_VIEW_CONTROLS::WarpMouseCursor( const VECTOR2D& aPosition, bool aWorldCoordinates,
bool aWarpView )
{
if( aWorldCoordinates )
{
const VECTOR2I& screenSize = m_view->GetGAL()->GetScreenPixelSize();
BOX2I screen( VECTOR2I( 0, 0 ), screenSize );
VECTOR2D clampedPosition = GetClampedCoords( aPosition );
VECTOR2D screenPos = m_view->ToScreen( clampedPosition );
if( !screen.Contains( screenPos ) )
{
if( aWarpView )
{
m_view->SetCenter( clampedPosition );
KIPLATFORM::UI::WarpPointer( m_parentPanel, screenSize.x / 2, screenSize.y / 2 );
}
}
else
{
KIPLATFORM::UI::WarpPointer( m_parentPanel, screenPos.x, screenPos.y );
}
}
else
{
KIPLATFORM::UI::WarpPointer( m_parentPanel, aPosition.x, aPosition.y );
}
// If we are not refreshing because of mouse movement, don't set the modifiers
// because we are refreshing for keyboard movement, which uses the same modifiers for other actions
refreshMouse( m_updateCursor );
}
void WX_VIEW_CONTROLS::CenterOnCursor()
{
const VECTOR2I& screenSize = m_view->GetGAL()->GetScreenPixelSize();
VECTOR2D screenCenter( screenSize / 2 );
if( GetMousePosition( false ) != screenCenter )
{
VECTOR2D newCenter = GetCursorPosition();
if( KIPLATFORM::UI::WarpPointer( m_parentPanel, screenCenter.x, screenCenter.y ) )
{
m_view->SetCenter( newCenter );
m_dragStartPoint = screenCenter;
}
}
}
void WX_VIEW_CONTROLS::PinCursorInsideNonAutoscrollArea( bool aWarpMouseCursor )
{
int border = std::min( m_settings.m_autoPanMargin * m_view->GetScreenPixelSize().x,
m_settings.m_autoPanMargin * m_view->GetScreenPixelSize().y );
border += 2;
VECTOR2D topLeft( border, border );
VECTOR2D botRight( m_view->GetScreenPixelSize().x - border,
m_view->GetScreenPixelSize().y - border );
topLeft = m_view->ToWorld( topLeft );
botRight = m_view->ToWorld( botRight );
VECTOR2D pos = GetMousePosition( true );
if( pos.x < topLeft.x )
pos.x = topLeft.x;
else if( pos.x > botRight.x )
pos.x = botRight.x;
if( pos.y < topLeft.y )
pos.y = topLeft.y;
else if( pos.y > botRight.y )
pos.y = botRight.y;
SetCursorPosition( pos, false, false, 0 );
if( aWarpMouseCursor )
WarpMouseCursor( pos, true );
}
bool WX_VIEW_CONTROLS::handleAutoPanning( const wxMouseEvent& aEvent )
{
VECTOR2I p( aEvent.GetX(), aEvent.GetY() );
VECTOR2I pKey( m_view->ToScreen(m_settings.m_lastKeyboardCursorPosition ) );
if( m_cursorWarped || ( m_settings.m_lastKeyboardCursorPositionValid && p == pKey ) )
{
// last cursor move event came from keyboard cursor control. If auto-panning is enabled
// and the next position is inside the autopan zone, check if it really came from a mouse
// event, otherwise disable autopan temporarily. Also temporarily disable autopan if the
// cursor is in the autopan zone because the application warped the cursor.
m_cursorWarped = false;
return true;
}
m_cursorWarped = false;
// Compute areas where autopanning is active
int borderStart = std::min( m_settings.m_autoPanMargin * m_view->GetScreenPixelSize().x,
m_settings.m_autoPanMargin * m_view->GetScreenPixelSize().y );
borderStart = std::max( borderStart, 2 );
int borderEndX = m_view->GetScreenPixelSize().x - borderStart;
int 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();
setState( IDLE );
return false;
}
return true;
case IDLE:
if( borderHit )
{
setState( AUTO_PANNING );
m_panTimer.Start( (int) ( 250.0 / 60.0 ), true );
return true;
}
return false;
case DRAG_PANNING:
case DRAG_ZOOMING:
return false;
}
wxCHECK_MSG( false, false, wxT( "This line should never be reached" ) );
return false;
}
void WX_VIEW_CONTROLS::handleCursorCapture( int x, int y )
{
if( m_settings.m_cursorCaptured )
{
bool warp = false;
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 )
KIPLATFORM::UI::WarpPointer( m_parentPanel, x, y );
}
}
void WX_VIEW_CONTROLS::refreshMouse( bool aSetModifiers )
{
// Notify tools that the cursor position has changed in the world coordinates
wxMouseEvent moveEvent( EVT_REFRESH_MOUSE );
wxPoint msp = getMouseScreenPosition();
moveEvent.SetX( msp.x );
moveEvent.SetY( msp.y );
if( aSetModifiers )
{
// Set the modifiers state
moveEvent.SetControlDown( wxGetKeyState( WXK_CONTROL ) );
moveEvent.SetShiftDown( wxGetKeyState( WXK_SHIFT ) );
moveEvent.SetAltDown( wxGetKeyState( WXK_ALT ) );
}
m_cursorPos = GetClampedCoords( m_view->ToWorld( VECTOR2D( msp.x, msp.y ) ) );
wxPostEvent( m_parentPanel, moveEvent );
}
wxPoint WX_VIEW_CONTROLS::getMouseScreenPosition() const
{
wxPoint msp = KIPLATFORM::UI::GetMousePosition();
m_parentPanel->ScreenToClient( &msp.x, &msp.y );
return msp;
}
void WX_VIEW_CONTROLS::UpdateScrollbars()
{
const BOX2D viewport = m_view->GetViewport();
const BOX2D& 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 );
// We add the width of the scroll bar thumb to the range because the scroll range is given by
// the full bar while the position is given by the left/top position of the thumb
VECTOR2I newRange( m_scrollScale.x * boundary.GetWidth() +
m_parentPanel->GetScrollThumb( wxSB_HORIZONTAL ),
m_scrollScale.y * boundary.GetHeight() +
m_parentPanel->GetScrollThumb( wxSB_VERTICAL ) );
// Flip scroll direction in flipped view
if( m_view->IsMirroredX() )
newScroll.x = ( boundary.GetRight() - viewport.Centre().x ) * m_scrollScale.x;
// Adjust scrollbars only if it is needed. Otherwise there are cases when canvas is continuously
// refreshed (Windows)
if( m_scrollPos != newScroll || newRange.x != m_parentPanel->GetScrollRange( wxSB_HORIZONTAL )
|| newRange.y != m_parentPanel->GetScrollRange( wxSB_VERTICAL ) )
{
m_parentPanel->SetScrollbars( 1, 1, newRange.x, newRange.y, newScroll.x, newScroll.y,
true );
m_scrollPos = newScroll;
#if !defined( __APPLE__ ) && !defined( WIN32 )
// Trigger a mouse refresh to get the canvas update in GTK (re-draws the scrollbars).
// Note that this causes an infinite loop on OSX and Windows (in certain cases) as it
// generates a paint event.
refreshMouse( false );
#endif
}
}
void WX_VIEW_CONTROLS::ForceCursorPosition( bool aEnabled, const VECTOR2D& aPosition )
{
VECTOR2D clampedPosition = GetClampedCoords( aPosition );
m_settings.m_forceCursorPosition = aEnabled;
m_settings.m_forcedPosition = clampedPosition;
}
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