pl_point_editor.cpp

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/*
 * This program source code file is part of KiCad, a free EDA CAD application.
 *
 * Copyright (C) 2019 CERN
 * Copyright (C) 2019-2021 KiCad Developers, see AUTHORS.txt for contributors.
 *
 * 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 <functional>
using namespace std::placeholders;
 
#include <tool/tool_manager.h>
#include <tool/actions.h>
#include <view/view_controls.h>
#include <gal/graphics_abstraction_layer.h>
#include <confirm.h>
#include <bitmaps.h>
#include <status_popup.h>
#include <drawing_sheet/ds_draw_item.h>
#include <drawing_sheet/ds_data_item.h>
#include "pl_editor_frame.h"
#include "pl_point_editor.h"
#include "properties_frame.h"
#include "tools/pl_selection_tool.h"
 
// Few constants to avoid using bare numbers for point indices
enum RECTANGLE_POINTS
{
 RECT_TOPLEFT, RECT_TOPRIGHT, RECT_BOTLEFT, RECT_BOTRIGHT
};
 
enum LINE_POINTS
{
 LINE_START, LINE_END
};
 
class EDIT_POINTS_FACTORY
{
public:
 static std::shared_ptr<EDIT_POINTS> Make( EDA_ITEM* aItem )
 {
 std::shared_ptr<EDIT_POINTS> points = std::make_shared<EDIT_POINTS>( aItem );
 
 if( !aItem )
 return points;
 
 // Generate list of edit points based on the item type
 switch( aItem->Type() )
 {
 case WSG_LINE_T:
 {
 DS_DRAW_ITEM_LINE* line = static_cast<DS_DRAW_ITEM_LINE*>( aItem );
 points->AddPoint( line->GetStart() );
 points->AddPoint( line->GetEnd() );
 break;
 }
 case WSG_RECT_T:
 {
 DS_DRAW_ITEM_RECT* rect = static_cast<DS_DRAW_ITEM_RECT*>( aItem );
 VECTOR2I topLeft = rect->GetStart();
 VECTOR2I botRight = rect->GetEnd();
 
 if( topLeft.y > botRight.y )
 std::swap( topLeft.y, botRight.y );
 
 if( topLeft.x > botRight.x )
 std::swap( topLeft.x, botRight.x );
 
 points->AddPoint( topLeft );
 points->AddPoint( VECTOR2I( botRight.x, topLeft.y ) );
 points->AddPoint( VECTOR2I( topLeft.x, botRight.y ) );
 points->AddPoint( botRight );
 break;
 }
 default:
 points.reset();
 break;
 }
 
 return points;
 }
 
private:
 EDIT_POINTS_FACTORY() {};
};
 
 
PL_POINT_EDITOR::PL_POINT_EDITOR() :
 TOOL_INTERACTIVE( "plEditor.PointEditor" ),
 m_frame( nullptr ),
 m_selectionTool( nullptr ),
 m_editedPoint( nullptr )
{
}
 
 
void PL_POINT_EDITOR::Reset( RESET_REASON aReason )
{
 if( aReason == MODEL_RELOAD )
 {
 // Init variables used by every drawing tool
 m_frame = getEditFrame<PL_EDITOR_FRAME>();
 }
 
 m_editPoints.reset();
}
 
 
bool PL_POINT_EDITOR::Init()
{
 m_frame = getEditFrame<PL_EDITOR_FRAME>();
 m_selectionTool = m_toolMgr->GetTool<PL_SELECTION_TOOL>();
 return true;
}
 
 
void PL_POINT_EDITOR::updateEditedPoint( const TOOL_EVENT& aEvent )
{
 EDIT_POINT* point = m_editedPoint;
 
 if( aEvent.IsMotion() )
 point = m_editPoints->FindPoint( aEvent.Position(), getView() );
 else if( aEvent.IsDrag( BUT_LEFT ) )
 point = m_editPoints->FindPoint( aEvent.DragOrigin(), getView() );
 else
 point = m_editPoints->FindPoint( getViewControls()->GetCursorPosition(), getView() );
 
 if( m_editedPoint != point )
 setEditedPoint( point );
}
 
 
int PL_POINT_EDITOR::Main( const TOOL_EVENT& aEvent )
{
 KIGFX::VIEW_CONTROLS* controls = getViewControls();
 const PL_SELECTION& selection = m_selectionTool->GetSelection();
 
 if( selection.Size() != 1 || !selection.Front()->IsType( { WSG_LINE_T, WSG_RECT_T } ) )
 return 0;
 
 EDA_ITEM* item = (EDA_ITEM*) selection.Front();
 
 // Wait till drawing tool is done
 if( item->IsNew() )
 return 0;
 
 Activate();
 // Must be done after Activate() so that it gets set into the correct context
 controls->ShowCursor( true );
 
 m_editPoints = EDIT_POINTS_FACTORY::Make( item );
 
 if( !m_editPoints )
 return 0;
 
 getView()->Add( m_editPoints.get() );
 setEditedPoint( nullptr );
 updateEditedPoint( aEvent );
 bool inDrag = false;
 bool modified = false;
 
 // Main loop: keep receiving events
 while( TOOL_EVENT* evt = Wait() )
 {
 if( !m_editPoints || evt->IsSelectionEvent() )
 break;
 
 if ( !inDrag )
 updateEditedPoint( *evt );
 
 if( evt->IsDrag( BUT_LEFT ) && m_editedPoint )
 {
 if( !inDrag )
 {
 m_frame->SaveCopyInUndoList();
 controls->ForceCursorPosition( false );
 inDrag = true;
 modified = true;
 }
 
 m_editedPoint->SetPosition( controls->GetCursorPosition( !evt->DisableGridSnapping() ) );
 
 updateItem();
 updatePoints();
 }
 
 else if( inDrag && evt->IsMouseUp( BUT_LEFT ) )
 {
 controls->SetAutoPan( false );
 inDrag = false;
 }
 
 else if( evt->IsCancelInteractive() || evt->IsActivate() )
 {
 if( inDrag ) // Restore the last change
 {
 m_frame->RollbackFromUndo();
 inDrag = false;
 modified = false;
 }
 else if( evt->IsCancelInteractive() )
 break;
 
 if( evt->IsActivate() && !evt->IsMoveTool() )
 break;
 }
 
 else
 evt->SetPassEvent();
 
 controls->SetAutoPan( inDrag );
 controls->CaptureCursor( inDrag );
 }
 
 controls->SetAutoPan( false );
 controls->CaptureCursor( false );
 
 if( m_editPoints )
 {
 getView()->Remove( m_editPoints.get() );
 
 if( modified )
 m_frame->OnModify();
 
 m_editPoints.reset();
 m_frame->GetCanvas()->Refresh();
 }
 
 return 0;
}
 
 
void pinEditedCorner( int editedPointIndex, int minWidth, int minHeight, VECTOR2I& topLeft,
 VECTOR2I& topRight, VECTOR2I& botLeft, VECTOR2I& botRight )
{
 switch( editedPointIndex )
 {
 case RECT_TOPLEFT:
 // pin edited point within opposite corner
 topLeft.x = std::min( topLeft.x, botRight.x - minWidth );
 topLeft.y = std::min( topLeft.y, botRight.y - minHeight );
 
 // push edited point edges to adjacent corners
 topRight.y = topLeft.y;
 botLeft.x = topLeft.x;
 
 break;
 
 case RECT_TOPRIGHT:
 // pin edited point within opposite corner
 topRight.x = std::max( topRight.x, botLeft.x + minWidth );
 topRight.y = std::min( topRight.y, botLeft.y - minHeight );
 
 // push edited point edges to adjacent corners
 topLeft.y = topRight.y;
 botRight.x = topRight.x;
 
 break;
 
 case RECT_BOTLEFT:
 // pin edited point within opposite corner
 botLeft.x = std::min( botLeft.x, topRight.x - minWidth );
 botLeft.y = std::max( botLeft.y, topRight.y + minHeight );
 
 // push edited point edges to adjacent corners
 botRight.y = botLeft.y;
 topLeft.x = botLeft.x;
 
 break;
 
 case RECT_BOTRIGHT:
 // pin edited point within opposite corner
 botRight.x = std::max( botRight.x, topLeft.x + minWidth );
 botRight.y = std::max( botRight.y, topLeft.y + minHeight );
 
 // push edited point edges to adjacent corners
 botLeft.y = botRight.y;
 topRight.x = botRight.x;
 
 break;
 }
}
 
 
void PL_POINT_EDITOR::updateItem() const
{
 EDA_ITEM* item = m_editPoints->GetParent();
 
 if( !item )
 return;
 
 DS_DATA_ITEM* dataItem = static_cast<DS_DRAW_ITEM_BASE*>( item )->GetPeer();
 
 // The current item is perhaps not the main item if we have a set of repeated items.
 // So we change the coordinate references in dataItem using move vectors of the start and
 // end points that are the same for each repeated item.
 
 switch( item->Type() )
 {
 case WSG_LINE_T:
 {
 DS_DRAW_ITEM_LINE* line = static_cast<DS_DRAW_ITEM_LINE*>( item );
 
 VECTOR2I move_startpoint = m_editPoints->Point( LINE_START ).GetPosition() - line->GetStart();
 VECTOR2I move_endpoint = m_editPoints->Point( LINE_END ).GetPosition() - line->GetEnd();
 
 dataItem->MoveStartPointToUi( dataItem->GetStartPosUi() + move_startpoint );
 dataItem->MoveEndPointToUi( dataItem->GetEndPosUi() + move_endpoint );
 
 for( DS_DRAW_ITEM_BASE* draw_item : dataItem->GetDrawItems() )
 {
 DS_DRAW_ITEM_LINE* draw_line = static_cast<DS_DRAW_ITEM_LINE*>( draw_item );
 
 draw_line->SetStart( draw_line->GetStart() + move_startpoint );
 draw_line->SetEnd( draw_line->GetEnd() + move_endpoint );
 getView()->Update( draw_item );
 }
 
 break;
 }
 
 case WSG_RECT_T:
 {
 DS_DRAW_ITEM_RECT* rect = static_cast<DS_DRAW_ITEM_RECT*>( item );
 VECTOR2I topLeft = m_editPoints->Point( RECT_TOPLEFT ).GetPosition();
 VECTOR2I topRight = m_editPoints->Point( RECT_TOPRIGHT ).GetPosition();
 VECTOR2I botLeft = m_editPoints->Point( RECT_BOTLEFT ).GetPosition();
 VECTOR2I  botRight = m_editPoints->Point( RECT_BOTRIGHT ).GetPosition();
 
 pinEditedCorner( getEditedPointIndex(), drawSheetIUScale.MilsToIU( 1 ),
 drawSheetIUScale.MilsToIU( 1 ),
 topLeft, topRight, botLeft, botRight );
 
 VECTOR2I start_delta, end_delta;
 
 if( rect->GetStart().y > rect->GetEnd().y )
 {
 start_delta.y = botRight.y - rect->GetStart().y;
 end_delta.y = topLeft.y - rect->GetEnd().y;
 }
 else
 {
 start_delta.y = topLeft.y - rect->GetStart().y;
 end_delta.y = botRight.y - rect->GetEnd().y;
 }
 
 if( rect->GetStart().x > rect->GetEnd().x )
 {
 start_delta.x = botRight.x - rect->GetStart().x;
 end_delta.x = topLeft.x - rect->GetEnd().x;
 }
 else
 {
 start_delta.x = topLeft.x - rect->GetStart().x;
 end_delta.x = botRight.x - rect->GetEnd().x;
 }
 
 dataItem->MoveStartPointToUi( dataItem->GetStartPosUi() + start_delta );
 dataItem->MoveEndPointToUi( dataItem->GetEndPosUi() + end_delta );
 
 for( DS_DRAW_ITEM_BASE* draw_item : dataItem->GetDrawItems() )
 {
 DS_DRAW_ITEM_RECT* draw_rect = static_cast<DS_DRAW_ITEM_RECT*>( draw_item );
 
 draw_rect->SetStart( draw_rect->GetStart() + start_delta );
 draw_rect->SetEnd( draw_rect->GetEnd() + end_delta );
 getView()->Update( draw_item );
 }
 
 break;
 }
 
 default:
 break;
 }
 
 m_frame->SetMsgPanel( item );
 
 // The Properties frame will be updated. Avoid flicker during update:
 m_frame->GetPropertiesFrame()->Freeze();
 m_frame->GetPropertiesFrame()->CopyPrmsFromItemToPanel( dataItem );
 m_frame->GetPropertiesFrame()->Thaw();
}
 
 
void PL_POINT_EDITOR::updatePoints()
{
 if( !m_editPoints )
 return;
 
 EDA_ITEM* item = m_editPoints->GetParent();
 
 if( !item )
 return;
 
 switch( item->Type() )
 {
 case WSG_LINE_T:
 {
 DS_DRAW_ITEM_LINE* line = static_cast<DS_DRAW_ITEM_LINE*>( item );
 
 m_editPoints->Point( LINE_START ).SetPosition( line->GetStart() );
 m_editPoints->Point( LINE_END ).SetPosition( line->GetEnd() );
 break;
 }
 
 case WSG_RECT_T:
 {
 DS_DRAW_ITEM_RECT* rect = static_cast<DS_DRAW_ITEM_RECT*>( item );
 VECTOR2I topLeft = rect->GetPosition();
 VECTOR2I botRight = rect->GetEnd();
 
 if( topLeft.y > botRight.y )
 std::swap( topLeft.y, botRight.y );
 
 if( topLeft.x > botRight.x )
 std::swap( topLeft.x, botRight.x );
 
 m_editPoints->Point( RECT_TOPLEFT ).SetPosition( (VECTOR2I) topLeft );
 m_editPoints->Point( RECT_TOPRIGHT ).SetPosition( VECTOR2I( botRight.x, topLeft.y ) );
 m_editPoints->Point( RECT_BOTLEFT ).SetPosition( VECTOR2I( topLeft.x, botRight.y ) );
 m_editPoints->Point( RECT_BOTRIGHT ).SetPosition( (VECTOR2I) botRight );
 break;
 }
 
 default:
 break;
 }
 
 getView()->Update( m_editPoints.get() );
}
 
 
void PL_POINT_EDITOR::setEditedPoint( EDIT_POINT* aPoint )
{
 KIGFX::VIEW_CONTROLS* controls = getViewControls();
 
 if( aPoint )
 {
 m_frame->GetCanvas()->SetCurrentCursor( KICURSOR::ARROW );
 controls->ForceCursorPosition( true, aPoint->GetPosition() );
 controls->ShowCursor( true );
 }
 else
 {
 if( m_frame->ToolStackIsEmpty() )
 controls->ShowCursor( false );
 
 controls->ForceCursorPosition( false );
 }
 
 m_editedPoint = aPoint;
}
 
 
int PL_POINT_EDITOR::modifiedSelection( const TOOL_EVENT& aEvent )
{
 updatePoints();
 return 0;
}
 
 
void PL_POINT_EDITOR::setTransitions()
{
 Go( &PL_POINT_EDITOR::Main, EVENTS::SelectedEvent );
 Go( &PL_POINT_EDITOR::Main, ACTIONS::activatePointEditor.MakeEvent() );
 Go( &PL_POINT_EDITOR::modifiedSelection, EVENTS::SelectedItemsModified );
}