source: git/src/guicontrol.cc@ db452ae

//
//  guicontrol.cc
//
//  Handlers for events relating to the display of a survey.
//
//  Copyright (C) 2000-2002 Mark R. Shinwell
//  Copyright (C) 2001-2004 Olly Betts
//
//  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, write to the Free Software
//  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
//

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include "guicontrol.h"
#include "gfxcore.h"
#include <wx/confbase.h>

const int DISPLAY_SHIFT = 10;
const double FLYFREE_SHIFT = 0.2;
const double ROTATE_STEP = 2.0;

GUIControl::GUIControl()
{
    m_View = NULL;
    m_DraggingLeft = false;
    m_DraggingMiddle = false;
    m_DraggingRight = false;
    m_ReverseControls = false;
    m_LastDrag = drag_NONE;
}

GUIControl::~GUIControl()
{
    // no action
}

void GUIControl::SetView(GfxCore* view)
{
    m_View = view;
}

bool GUIControl::MouseDown()
{
    return m_DraggingLeft || m_DraggingMiddle || m_DraggingRight;
}

void GUIControl::HandleTilt(wxPoint point)
{
    // Handle a mouse movement during tilt mode.
    int dy = point.y - m_DragStart.y;

    if (m_ReverseControls != m_View->GetPerspective()) dy = -dy;

    m_View->TiltCave(Double(-dy) * 0.36);

    m_DragStart = point;

    m_View->ForceRefresh();
}

void GUIControl::HandleTranslate(wxPoint point)
{
    // Handle a mouse movement during translation mode.
    int dx = point.x - m_DragStart.x;
    int dy = point.y - m_DragStart.y;
 
    if (m_ReverseControls) {
        dx = -dx;
        dy = -dy;
    }

    if (m_View->GetPerspective())
        m_View->MoveViewer(0, -dy * .1, dx * .1);
    else
        m_View->TranslateCave(dx, dy);

    m_DragStart = point;
}

void GUIControl::HandleScale(wxPoint point)
{
    // Handle a mouse movement during scale mode.

    int dx = point.x - m_DragStart.x;
    int dy = point.y - m_DragStart.y;

    if (m_ReverseControls) {
        dx = -dx;
        dy = -dy;
    }

    if (m_View->GetPerspective()) {
        m_View->MoveViewer(-dy * .1, 0, 0);
    } else {
        m_View->SetScale(m_View->GetScale() * pow(1.06, 0.08 * dy));
        m_View->ForceRefresh();
    }

    m_DragStart = point;
}

void GUIControl::HandleTiltRotate(wxPoint point)
{
    // Handle a mouse movement during tilt/rotate mode.

    int dx = point.x - m_DragStart.x;
    int dy = point.y - m_DragStart.y;

    if (m_ReverseControls != m_View->GetPerspective()) {
        dx = -dx;
        dy = -dy;
    }

    // left/right => rotate, up/down => tilt.
    // Make tilt less sensitive than rotate as that feels better.
    m_View->TurnCave(m_View->CanRotate() ? (Double(dx) * -0.36) : 0.0);
    m_View->TiltCave(Double(-dy) * 0.18);

    m_View->ForceRefresh();

    m_DragStart = point;
}

void GUIControl::HandleScaleRotate(wxPoint point)
{
    // Handle a mouse movement during scale/rotate mode.
    int dx = point.x - m_DragStart.x;
    int dy = point.y - m_DragStart.y;

    if (m_ReverseControls) {
        dx = -dx;
        dy = -dy;
    }

    Double pan_angle = m_View->CanRotate() ? (Double(dx) * -0.36) : 0.0;

    // left/right => rotate, up/down => scale
    m_View->TurnCave(pan_angle);

    m_View->SetScale(m_View->GetScale() * pow(1.06, 0.08 * dy));

#ifdef AVENGL
    //glDeleteLists(m_Lists.grid, 1);
    //    DrawGrid();
#endif
    m_View->ForceRefresh();

    m_DragStart = point;
}

void GUIControl::HandCursor()
{
    const wxCursor HAND_CURSOR(wxCURSOR_HAND);
    m_View->SetCursor(HAND_CURSOR);
}

void GUIControl::RestoreCursor()
{
    if (m_View->ShowingMeasuringLine()) {
        HandCursor();
    }
    else {
        m_View->SetCursor(wxNullCursor);
    }
}

//
//  Mouse event handling methods
//

void GUIControl::OnMouseMove(wxMouseEvent& event)
{
    // Mouse motion event handler.
    if (!m_View->HasData()) return;

    wxPoint point = wxPoint(event.GetX(), event.GetY());

    // Check hit-test grid (only if no buttons are pressed).
    if (!event.LeftIsDown() && !event.MiddleIsDown() && !event.RightIsDown()) {
        if (m_View->CheckHitTestGrid(point, false)) {
            HandCursor();
        }
        else {            
            if (m_View->ShowingScaleBar() &&
                m_View->PointWithinScaleBar(point)) {

                const wxCursor CURSOR(wxCURSOR_SIZEWE);
                m_View->SetCursor(CURSOR);
            }
            else {
                m_View->SetCursor(wxNullCursor);
            }
        }
    }

    // Update coordinate display if in plan view,
    // or altitude if in elevation view.
    m_View->SetCoords(point);

    if (!m_View->ChangingOrientation()) {
        if (m_DraggingLeft) {
            if (m_LastDrag == drag_NONE) {
                if (m_View->ShowingCompass() &&
                    m_View->PointWithinCompass(point)) {
                    m_LastDrag = drag_COMPASS;
                }
                else if (m_View->ShowingClino() &&
                         m_View->PointWithinClino(point)) {
                    m_LastDrag = drag_ELEV;
                }
                else if (m_View->ShowingScaleBar() &&
                         m_View->PointWithinScaleBar(point)) {
                    m_LastDrag = drag_SCALE;
                }
            }

            if (m_LastDrag == drag_COMPASS) {
                // drag in heading indicator
                m_View->SetCompassFromPoint(point);
            }
            else if (m_LastDrag == drag_ELEV) {
                // drag in clinometer
                m_View->SetClinoFromPoint(point);
            }
            else if (m_LastDrag == drag_SCALE) {
                // FIXME: check why there was a check here for x being inside
                // the window
                m_View->SetScaleBarFromOffset(point.x - m_DragLast.x);
            }
            else if (m_LastDrag == drag_NONE || m_LastDrag == drag_MAIN) {
                m_LastDrag = drag_MAIN;
                if (event.ShiftDown()) {
                    HandleScaleRotate(point);
                }
                else {
                    HandleTiltRotate(point);
                }
            }
        }
        else if (m_DraggingMiddle) {
            if (event.ShiftDown()) {
                HandleTilt(point);
            }
            else {
                HandleScale(point);
            }
        }
        else if (m_DraggingRight) {
            if ((m_LastDrag == drag_NONE && m_View->PointWithinScaleBar(point)) || m_LastDrag == drag_SCALE) {
            /* FIXME
                  if (point.x < 0) point.x = 0;
                  if (point.y < 0) point.y = 0;
                  if (point.x > m_XSize) point.x = m_XSize;
                  if (point.y > m_YSize) point.y = m_YSize;
                  m_LastDrag = drag_SCALE;
                  int x_inside_bar = m_DragStart.x - m_ScaleBar.drag_start_offset_x;
                  int y_inside_bar = m_YSize - m_ScaleBar.drag_start_offset_y - m_DragStart.y;
                  m_ScaleBar.offset_x = point.x - x_inside_bar;
                  m_ScaleBar.offset_y = (m_YSize - point.y) - y_inside_bar;
                  m_View->ForceRefresh(); */
            }
            else {
                m_LastDrag = drag_MAIN;
                HandleTranslate(point);
            }
        }
    }

    m_DragLast = point;
}

void GUIControl::OnLButtonDown(wxMouseEvent& event)
{
    if (m_View->HasData() && m_View->GetLock() != lock_POINT) {
        m_DraggingLeft = true;
        
        /* FIXME
        m_ScaleBar.drag_start_offset_x = m_ScaleBar.offset_x;
        m_ScaleBar.drag_start_offset_y = m_ScaleBar.offset_y; */

        m_DragStart = m_DragRealStart = wxPoint(event.GetX(), event.GetY());
        
//        const wxCursor CURSOR(wxCURSOR_MAGNIFIER);
//        m_View->SetCursor(CURSOR);
        m_View->CaptureMouse();
    }
}

void GUIControl::OnLButtonUp(wxMouseEvent& event)
{
    if (m_View->HasData() && m_View->GetLock() != lock_POINT) {
        if (event.GetPosition() == m_DragRealStart) {
            // just a "click"...
            m_View->CheckHitTestGrid(m_DragStart, true);
        }

//      m_View->RedrawIndicators();
        m_View->ReleaseMouse();

        m_LastDrag = drag_NONE;
        m_DraggingLeft = false;

        m_View->DragFinished();
        
        RestoreCursor();
    }
}

void GUIControl::OnMButtonDown(wxMouseEvent& event)
{
    if (m_View->HasData() && m_View->GetLock() == lock_NONE) {
        m_DraggingMiddle = true;
        m_DragStart = wxPoint(event.GetX(), event.GetY());

        const wxCursor CURSOR(wxCURSOR_MAGNIFIER);
        m_View->SetCursor(CURSOR);
        m_View->CaptureMouse();
    }
}

void GUIControl::OnMButtonUp(wxMouseEvent&)
{
    if (m_View->HasData() && m_View->GetLock() == lock_NONE) {
        m_DraggingMiddle = false;
        m_View->ReleaseMouse();
        m_View->DragFinished();

        RestoreCursor();
    }
}

void GUIControl::OnRButtonDown(wxMouseEvent& event)
{
    if (m_View->HasData()) {
        m_DragStart = wxPoint(event.GetX(), event.GetY());
        
/* FIXME        m_ScaleBar.drag_start_offset_x = m_ScaleBar.offset_x;
        m_ScaleBar.drag_start_offset_y = m_ScaleBar.offset_y; */

        m_DraggingRight = true;

      //  const wxCursor CURSOR(wxCURSOR_HAND);
      //  m_View->SetCursor(CURSOR);
        m_View->CaptureMouse();
    }
}

void GUIControl::OnRButtonUp(wxMouseEvent&)
{
    m_LastDrag = drag_NONE;
    m_View->ReleaseMouse();

    m_DraggingRight = false;
    
    RestoreCursor();
    
    m_View->DragFinished();
}

void GUIControl::OnDisplayOverlappingNames()
{
    m_View->ToggleOverlappingNames();
}

void GUIControl::OnDisplayOverlappingNamesUpdate(wxUpdateUIEvent& cmd)
{
    cmd.Enable(m_View->HasData() && m_View->ShowingStationNames());
    cmd.Check(m_View->ShowingOverlappingNames());
}

void GUIControl::OnColourByDepth()
{
    if (m_View->ColouringBy() == COLOUR_BY_DEPTH) {
        m_View->SetColourBy(COLOUR_BY_NONE);
    } else {
        m_View->SetColourBy(COLOUR_BY_DEPTH);
    }
}

void GUIControl::OnColourByDepthUpdate(wxUpdateUIEvent& cmd)
{
    cmd.Enable(m_View->HasData() && m_View->HasUndergroundLegs());
    cmd.Check(m_View->ColouringBy() == COLOUR_BY_DEPTH);
}

void GUIControl::OnShowCrosses()
{
    m_View->ToggleCrosses();
}

void GUIControl::OnShowCrossesUpdate(wxUpdateUIEvent& cmd)
{
    cmd.Enable(m_View->HasData());
    cmd.Check(m_View->ShowingCrosses());
}

void GUIControl::OnShowStationNames()
{
    m_View->ToggleStationNames();
}

void GUIControl::OnShowStationNamesUpdate(wxUpdateUIEvent& cmd)
{
    cmd.Enable(m_View->HasData());
    cmd.Check(m_View->ShowingStationNames());
}

void GUIControl::OnShowSurveyLegs()
{
    m_View->ToggleUndergroundLegs();
}

void GUIControl::OnShowSurveyLegsUpdate(wxUpdateUIEvent& cmd)
{
    cmd.Enable(m_View->HasData() && m_View->GetLock() != lock_POINT && m_View->HasUndergroundLegs());
    cmd.Check(m_View->ShowingUndergroundLegs());
}

void GUIControl::OnMoveEast()
{
    m_View->TurnCaveTo(90.0);
    m_View->ForceRefresh();
}

void GUIControl::OnMoveEastUpdate(wxUpdateUIEvent& cmd)
{
    cmd.Enable(m_View->HasData() && !(m_View->GetLock() & lock_Y));
}

void GUIControl::OnMoveNorth()
{
    m_View->TurnCaveTo(0.0);
    m_View->ForceRefresh();
}

void GUIControl::OnMoveNorthUpdate(wxUpdateUIEvent& cmd)
{
    cmd.Enable(m_View->HasData() && !(m_View->GetLock() & lock_X));
}

void GUIControl::OnMoveSouth()
{
    m_View->TurnCaveTo(180.0);
    m_View->ForceRefresh();
}

void GUIControl::OnMoveSouthUpdate(wxUpdateUIEvent& cmd)
{
    cmd.Enable(m_View->HasData() && !(m_View->GetLock() & lock_X));
}

void GUIControl::OnMoveWest()
{
    m_View->TurnCaveTo(270.0);
    m_View->ForceRefresh();
}

void GUIControl::OnMoveWestUpdate(wxUpdateUIEvent& cmd)
{
    cmd.Enable(m_View->HasData() && !(m_View->GetLock() & lock_Y));
}

void GUIControl::OnStartRotation()
{
    m_View->StartRotation();
}

void GUIControl::OnStartRotationUpdate(wxUpdateUIEvent& cmd)
{
    cmd.Enable(m_View->HasData() && !m_View->IsRotating() && m_View->CanRotate());
}

void GUIControl::OnToggleRotation()
{
    m_View->ToggleRotation();
}

void GUIControl::OnToggleRotationUpdate(wxUpdateUIEvent& cmd)
{
    cmd.Enable(m_View->HasData() && m_View->CanRotate());
    cmd.Check(m_View->HasData() && m_View->IsRotating());
}

void GUIControl::OnStopRotation()
{
    m_View->StopRotation();
}

void GUIControl::OnStopRotationUpdate(wxUpdateUIEvent& cmd)
{
    cmd.Enable(m_View->HasData() && m_View->IsRotating());
}

void GUIControl::OnReverseControls()
{
    m_ReverseControls = !m_ReverseControls;
}

void GUIControl::OnReverseControlsUpdate(wxUpdateUIEvent& cmd)
{
    cmd.Enable(m_View->HasData());
    cmd.Check(m_ReverseControls);
}

void GUIControl::OnReverseDirectionOfRotation()
{
    m_View->ReverseRotation();
}

void GUIControl::OnReverseDirectionOfRotationUpdate(wxUpdateUIEvent& cmd)
{
    cmd.Enable(m_View->HasData() && m_View->CanRotate());
}

void GUIControl::OnSlowDown(bool accel)
{
    m_View->RotateSlower(accel);
}

void GUIControl::OnSlowDownUpdate(wxUpdateUIEvent& cmd)
{
    cmd.Enable(m_View->HasData() && m_View->CanRotate());
}

void GUIControl::OnSpeedUp(bool accel)
{
    m_View->RotateFaster(accel);
}

void GUIControl::OnSpeedUpUpdate(wxUpdateUIEvent& cmd)
{
    cmd.Enable(m_View->HasData() && m_View->CanRotate());
}

void GUIControl::OnStepOnceAnticlockwise(bool accel)
{
    if (m_View->GetPerspective()) {
        m_View->TurnCave(accel ? -5.0 * ROTATE_STEP : -ROTATE_STEP);
    } else {
        m_View->TurnCave(accel ? 5.0 * ROTATE_STEP : ROTATE_STEP);
    }
    m_View->ForceRefresh();
}

void GUIControl::OnStepOnceAnticlockwiseUpdate(wxUpdateUIEvent& cmd)
{
    cmd.Enable(m_View->HasData() && m_View->CanRotate() && !m_View->IsRotating());
}

void GUIControl::OnStepOnceClockwise(bool accel)
{
    if (m_View->GetPerspective()) {
        m_View->TurnCave(accel ? 5.0 * ROTATE_STEP : ROTATE_STEP);
    } else {
        m_View->TurnCave(accel ? -5.0 * ROTATE_STEP : -ROTATE_STEP);
    }
    m_View->ForceRefresh();
}

void GUIControl::OnStepOnceClockwiseUpdate(wxUpdateUIEvent& cmd)
{
    cmd.Enable(m_View->HasData() && m_View->CanRotate() && !m_View->IsRotating());
}

void GUIControl::OnDefaults()
{
    m_View->Defaults();
}

void GUIControl::OnDefaultsUpdate(wxUpdateUIEvent& cmd)
{
    cmd.Enable(m_View->HasData());
}

void GUIControl::OnElevation()
{
    // Switch to elevation view.

    m_View->SwitchToElevation();
}

void GUIControl::OnElevationUpdate(wxUpdateUIEvent& cmd)
{
    cmd.Enable(m_View->HasData() && m_View->GetLock() == lock_NONE && !m_View->ShowingElevation());
}

void GUIControl::OnHigherViewpoint(bool accel)
{
    // Raise the viewpoint.
    if (m_View->GetPerspective()) {
        m_View->TiltCave(accel ? -5.0 * ROTATE_STEP : -ROTATE_STEP);
    } else {
        m_View->TiltCave(accel ? 5.0 * ROTATE_STEP : ROTATE_STEP);
    }
    m_View->ForceRefresh();
}

void GUIControl::OnHigherViewpointUpdate(wxUpdateUIEvent& cmd)
{
    if (m_View->GetPerspective()) {
        cmd.Enable(m_View->HasData() && m_View->CanLowerViewpoint() && m_View->GetLock() == lock_NONE);
    } else {
        cmd.Enable(m_View->HasData() && m_View->CanRaiseViewpoint() && m_View->GetLock() == lock_NONE);
    }
}

void GUIControl::OnLowerViewpoint(bool accel)
{
    // Lower the viewpoint.
    if (m_View->GetPerspective()) {
        m_View->TiltCave(accel ? 5.0 * ROTATE_STEP : ROTATE_STEP);
    } else {
        m_View->TiltCave(accel ? -5.0 * ROTATE_STEP : -ROTATE_STEP);
    }
    m_View->ForceRefresh();
}

void GUIControl::OnLowerViewpointUpdate(wxUpdateUIEvent& cmd)
{
    if (m_View->GetPerspective()) {
        cmd.Enable(m_View->HasData() && m_View->CanRaiseViewpoint() && m_View->GetLock() == lock_NONE);
    } else {
        cmd.Enable(m_View->HasData() && m_View->CanLowerViewpoint() && m_View->GetLock() == lock_NONE);
    }
}

void GUIControl::OnPlan()
{
    // Switch to plan view.
    m_View->SwitchToPlan();
}

void GUIControl::OnPlanUpdate(wxUpdateUIEvent& cmd)
{
    cmd.Enable(m_View->HasData() && m_View->GetLock() == lock_NONE && !m_View->ShowingPlan());
}

void GUIControl::OnShiftDisplayDown(bool accel)
{
    if (m_View->GetPerspective()) 
        m_View->MoveViewer(0, accel ? -5 * FLYFREE_SHIFT : -FLYFREE_SHIFT, 0);
    else
        m_View->TranslateCave(0, accel ? 5 * DISPLAY_SHIFT : DISPLAY_SHIFT);
}

void GUIControl::OnShiftDisplayDownUpdate(wxUpdateUIEvent& cmd)
{
    cmd.Enable(m_View->HasData());
}

void GUIControl::OnShiftDisplayLeft(bool accel)
{
    if (m_View->GetPerspective()) 
        m_View->MoveViewer(0, 0, accel ? -5 * FLYFREE_SHIFT : -FLYFREE_SHIFT);
    else
        m_View->TranslateCave(accel ? -5 * DISPLAY_SHIFT : -DISPLAY_SHIFT, 0);
}

void GUIControl::OnShiftDisplayLeftUpdate(wxUpdateUIEvent& cmd)
{
    cmd.Enable(m_View->HasData());
}

void GUIControl::OnShiftDisplayRight(bool accel)
{
    if (m_View->GetPerspective()) 
        m_View->MoveViewer(0, 0, accel ? 5 * FLYFREE_SHIFT : FLYFREE_SHIFT);
    else
        m_View->TranslateCave(accel ? 5 * DISPLAY_SHIFT : DISPLAY_SHIFT, 0);
}

void GUIControl::OnShiftDisplayRightUpdate(wxUpdateUIEvent& cmd)
{
    cmd.Enable(m_View->HasData());
}

void GUIControl::OnShiftDisplayUp(bool accel)
{
    if (m_View->GetPerspective()) 
        m_View->MoveViewer(0, accel ? 5 * FLYFREE_SHIFT : FLYFREE_SHIFT, 0);
    else
        m_View->TranslateCave(0, accel ? -5 * DISPLAY_SHIFT : -DISPLAY_SHIFT);
}

void GUIControl::OnShiftDisplayUpUpdate(wxUpdateUIEvent& cmd)
{
    cmd.Enable(m_View->HasData());
}

void GUIControl::OnZoomIn(bool accel)
{
    // Increase the scale.

    if (m_View->GetPerspective()) {
        m_View->MoveViewer(accel ? 5 * FLYFREE_SHIFT : FLYFREE_SHIFT, 0, 0);
    } else {
        m_View->SetScale(m_View->GetScale() * (accel ? 1.1236 : 1.06));
        m_View->ForceRefresh();
    }
}

void GUIControl::OnZoomInUpdate(wxUpdateUIEvent& cmd)
{
    cmd.Enable(m_View->HasData() && m_View->GetLock() != lock_POINT);
}

void GUIControl::OnZoomOut(bool accel)
{
    // Decrease the scale.

    if (m_View->GetPerspective()) {
        m_View->MoveViewer(accel ? -5 * FLYFREE_SHIFT : -FLYFREE_SHIFT, 0, 0);
    } else {
        m_View->SetScale(m_View->GetScale() / (accel ? 1.1236 : 1.06));
        m_View->ForceRefresh();
    }
}

void GUIControl::OnZoomOutUpdate(wxUpdateUIEvent& cmd)
{
    cmd.Enable(m_View->HasData() && m_View->GetLock() != lock_POINT);
}

void GUIControl::OnToggleScalebar()
{
    m_View->ToggleScaleBar();
}

void GUIControl::OnToggleScalebarUpdate(wxUpdateUIEvent& cmd)
{
    cmd.Enable(m_View->HasData() && m_View->GetLock() != lock_POINT);
    cmd.Check(m_View->ShowingScaleBar());
}

void GUIControl::OnToggleDepthbar() /* FIXME naming */
{
    m_View->ToggleDepthBar();
}

void GUIControl::OnToggleDepthbarUpdate(wxUpdateUIEvent& cmd)
{
    cmd.Enable(m_View->HasData() && !(m_View->GetLock() && lock_Z) &&
               m_View->ColouringBy() == COLOUR_BY_DEPTH);
    cmd.Check(m_View->ShowingDepthBar());
}

void GUIControl::OnViewCompass()
{
    m_View->ToggleCompass();
}

void GUIControl::OnViewCompassUpdate(wxUpdateUIEvent& cmd)
{
    cmd.Enable(m_View->HasData() && m_View->CanRotate());
    cmd.Check(m_View->ShowingCompass());
}

void GUIControl::OnViewClino()
{
    m_View->ToggleClino();
}

void GUIControl::OnViewClinoUpdate(wxUpdateUIEvent& cmd)
{
    cmd.Enable(m_View->HasData() && m_View->GetLock() == lock_NONE);
    cmd.Check(m_View->ShowingClino());
}

void GUIControl::OnShowSurface()
{
    m_View->ToggleSurfaceLegs();
}

void GUIControl::OnShowSurfaceUpdate(wxUpdateUIEvent& cmd)
{
    cmd.Enable(m_View->HasData() && m_View->HasSurfaceLegs());
    cmd.Check(m_View->ShowingSurfaceLegs());
}

void GUIControl::OnShowEntrances()
{
    m_View->ToggleEntrances();
}

void GUIControl::OnShowEntrancesUpdate(wxUpdateUIEvent& cmd)
{
    cmd.Enable(m_View->HasData() && (m_View->GetNumEntrances() > 0));
    cmd.Check(m_View->ShowingEntrances());
}

void GUIControl::OnShowFixedPts()
{
    m_View->ToggleFixedPts();
}

void GUIControl::OnShowFixedPtsUpdate(wxUpdateUIEvent& cmd)
{
    cmd.Enable(m_View->HasData() && (m_View->GetNumFixedPts() > 0));
    cmd.Check(m_View->ShowingFixedPts());
}

void GUIControl::OnShowExportedPts()
{
    m_View->ToggleExportedPts();
}

void GUIControl::OnShowExportedPtsUpdate(wxUpdateUIEvent& cmd)
{
    // FIXME enable only if we have timestamps...
    cmd.Enable(m_View->HasData() /*&& (m_View->GetNumExportedPts() > 0)*/);
    cmd.Check(m_View->ShowingExportedPts());
}

void GUIControl::OnViewGrid()
{
    m_View->ToggleGrid();
}

void GUIControl::OnViewGridUpdate(wxUpdateUIEvent& cmd)
{
    cmd.Enable(m_View->HasData());
}

void GUIControl::OnIndicatorsUpdate(wxUpdateUIEvent& cmd)
{
    cmd.Enable(m_View->HasData());
}

void GUIControl::OnViewPerspective()
{
    m_View->TogglePerspective();
    // Force update of coordinate display.
    if (m_View->GetPerspective()) {
        m_View->MoveViewer(0, 0, 0);
    } else {
        m_View->ClearCoords();
    }
}

void GUIControl::OnViewPerspectiveUpdate(wxUpdateUIEvent& cmd)
{
    cmd.Enable(m_View->HasData());
    cmd.Check(m_View->GetPerspective());
}

void GUIControl::OnViewFog()
{
    m_View->ToggleFog();
}

void GUIControl::OnViewFogUpdate(wxUpdateUIEvent& cmd)
{
    cmd.Enable(m_View->HasData());
    cmd.Check(m_View->GetFog());
}

void GUIControl::OnViewSmoothLines()
{
    m_View->ToggleAntiAlias();
}

void GUIControl::OnViewSmoothLinesUpdate(wxUpdateUIEvent& cmd)
{
    cmd.Enable(m_View->HasData());
    cmd.Check(m_View->GetAntiAlias());
}

void GUIControl::OnToggleMetric()
{
    m_View->ToggleMetric();

    wxConfigBase::Get()->Write("metric", m_View->GetMetric());
    wxConfigBase::Get()->Flush();
}

void GUIControl::OnToggleMetricUpdate(wxUpdateUIEvent& cmd)
{
    cmd.Enable(m_View->HasData());
    cmd.Check(m_View->GetMetric());
}

void GUIControl::OnToggleDegrees()
{
    m_View->ToggleDegrees();
    
    wxConfigBase::Get()->Write("degrees", m_View->GetDegrees());
    wxConfigBase::Get()->Flush();
}

void GUIControl::OnToggleDegreesUpdate(wxUpdateUIEvent& cmd)
{
    cmd.Enable(m_View->HasData());
    cmd.Check(m_View->GetDegrees());
}

void GUIControl::OnToggleTubes()
{
    m_View->ToggleTubes();
}

void GUIControl::OnToggleTubesUpdate(wxUpdateUIEvent& cmd)
{
    cmd.Enable(m_View->HasData());
    cmd.Check(m_View->GetTubes());
}

void GUIControl::OnCancelDistLine()
{
    m_View->ClearTreeSelection();
}

void GUIControl::OnCancelDistLineUpdate(wxUpdateUIEvent& cmd)
{
    cmd.Enable(m_View->ShowingMeasuringLine());
}

void GUIControl::OnKeyPress(wxKeyEvent &e)
{
    if (!m_View->HasData()) {
        e.Skip();
        return;
    }

    // The changelog says this is meant to keep animation going while keys are
    // pressed, but that happens anyway (on linux at least - perhaps it helps
    // on windows?)  FIXME : check!
    //bool refresh = m_View->Animate();

    switch (e.m_keyCode) {
        case '/': case '?':
            if (m_View->CanLowerViewpoint() && m_View->GetLock() == lock_NONE)
                OnLowerViewpoint(e.m_shiftDown);
            break;
        case '\'': case '@': case '"': // both shifted forms - US and UK kbd
            if (m_View->CanRaiseViewpoint() && m_View->GetLock() == lock_NONE)
                OnHigherViewpoint(e.m_shiftDown);
            break;
        case 'C': case 'c':
            if (m_View->CanRotate() && !m_View->IsRotating())
                OnStepOnceAnticlockwise(e.m_shiftDown);
            break;
        case 'V': case 'v':
            if (m_View->CanRotate() && !m_View->IsRotating())
                OnStepOnceClockwise(e.m_shiftDown);
            break;
        case ']': case '}':
            if (m_View->GetLock() != lock_POINT)
                OnZoomIn(e.m_shiftDown);
            break;
        case '[': case '{':
            if (m_View->GetLock() != lock_POINT)
                OnZoomOut(e.m_shiftDown);
            break;
        case 'N': case 'n':
            if (!(m_View->GetLock() & lock_X))
                OnMoveNorth();
            break;
        case 'S': case 's':
            if (!(m_View->GetLock() & lock_X))
                OnMoveSouth();
            break;
        case 'E': case 'e':
            if (!(m_View->GetLock() & lock_Y))
                OnMoveEast();
            break;
        case 'W': case 'w':
            if (!(m_View->GetLock() & lock_Y))
                OnMoveWest();
            break;
        case 'Z': case 'z':
            if (m_View->CanRotate())
                OnSpeedUp(e.m_shiftDown);
            break;
        case 'X': case 'x':
            if (m_View->CanRotate())
                OnSlowDown(e.m_shiftDown);
            break;
        case 'R': case 'r':
            if (m_View->CanRotate())
                OnReverseDirectionOfRotation();
            break;
        case 'P': case 'p':
            if (m_View->GetLock() == lock_NONE && !m_View->ShowingPlan())
                OnPlan();
            break;
        case 'L': case 'l':
            if (m_View->GetLock() == lock_NONE && !m_View->ShowingElevation())
                OnElevation();
            break;
        case 'O': case 'o':
            OnDisplayOverlappingNames();
            break;
        case WXK_DELETE:
            OnDefaults();
            break;
        case WXK_RETURN:
            if (m_View->CanRotate() && !m_View->IsRotating())
                OnStartRotation();
            break;
        case WXK_SPACE:
            if (m_View->IsRotating())
                OnStopRotation();
            break;
        case WXK_LEFT:
            if (e.m_controlDown) {
                if (m_View->CanRotate() && !m_View->IsRotating())
                    OnStepOnceAnticlockwise(e.m_shiftDown);
            } else {
                OnShiftDisplayLeft(e.m_shiftDown);
            }
            break;
        case WXK_RIGHT:
            if (e.m_controlDown) {
                if (m_View->CanRotate() && !m_View->IsRotating())
                    OnStepOnceClockwise(e.m_shiftDown);
            } else {
                OnShiftDisplayRight(e.m_shiftDown);
            }
            break;
        case WXK_UP:
            if (e.m_controlDown) {
                if (m_View->CanRaiseViewpoint() && m_View->GetLock() == lock_NONE)
                    OnHigherViewpoint(e.m_shiftDown);
            } else {
                OnShiftDisplayUp(e.m_shiftDown);
            }
            break;
        case WXK_DOWN:
            if (e.m_controlDown) {
                if (m_View->CanLowerViewpoint() && m_View->GetLock() == lock_NONE)
                    OnLowerViewpoint(e.m_shiftDown);
            } else {
                OnShiftDisplayDown(e.m_shiftDown);
            }
            break;
        case WXK_ESCAPE:
            if (m_View->ShowingMeasuringLine()) {
                OnCancelDistLine();
            }
            break;
        default:
            e.Skip();
    }
 
    //if (refresh) m_View->ForceRefresh();
}

void GUIControl::OnViewFullScreenUpdate(wxUpdateUIEvent& cmd)
{
    cmd.Enable(m_View->HasData());
    cmd.Check(m_View->IsFullScreen());
}

void GUIControl::OnViewFullScreen()
{
    m_View->FullScreenMode();
}