kicad/eeschema/bus-wire-junction.cpp

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/*
* This program source code file is part of KiCad, a free EDA CAD application.
*
* Copyright (C) 2004 Jean-Pierre Charras, jean-pierre.charras@gipsa-lab.inpg.fr
* Copyright (C) 2004-2011 KiCad Developers, see change_log.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
*/
/**
* @file bus-wire-junction.cpp
* @brief Code for editing buses, wires, and junctions.
*/
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#include <fctsys.h>
#include <gr_basic.h>
#include <class_drawpanel.h>
#include <schframe.h>
#include <lib_draw_item.h>
#include <lib_pin.h>
#include <general.h>
#include <sch_bus_entry.h>
#include <sch_junction.h>
#include <sch_line.h>
#include <sch_no_connect.h>
#include <sch_text.h>
#include <sch_component.h>
#include <sch_sheet.h>
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static void AbortCreateNewLine( EDA_DRAW_PANEL* aPanel, wxDC* aDC );
static void ComputeBreakPoint( SCH_LINE* segment, const wxPoint& new_pos );
static DLIST< SCH_ITEM > s_wires; // when creating a new set of wires,
// stores here the new wires.
/**
* In a contiguous list of wires, remove wires that backtrack over the previous
* wire. Example:
*
* Wire is added:
* ---------------------------------------->
*
* A second wire backtracks over it:
* -------------------<====================>
*
* RemoveBacktracks is called:
* ------------------->
*/
static void RemoveBacktracks( DLIST<SCH_ITEM>& aWires )
{
SCH_LINE* last_line = NULL;
EDA_ITEM* first = aWires.GetFirst();
for( EDA_ITEM* p = first; p; )
{
SCH_LINE *line = dynamic_cast<SCH_LINE*>( p );
if( !line )
{
wxFAIL_MSG( "RemoveBacktracks() requires SCH_LINE items" );
break;
}
p = line->Next();
if( last_line )
{
wxASSERT_MSG( last_line->GetEndPoint() == line->GetStartPoint(),
"RemoveBacktracks() requires contiguous lines" );
if( IsPointOnSegment( last_line->GetStartPoint(), line->GetStartPoint(),
line->GetEndPoint() ) )
{
last_line->SetEndPoint( line->GetEndPoint() );
delete s_wires.Remove( line );
}
else
last_line = line;
}
else
last_line = line;
}
}
/**
* Mouse capture callback for drawing line segments.
*/
static void DrawSegment( EDA_DRAW_PANEL* aPanel, wxDC* aDC, const wxPoint& aPosition,
bool aErase )
{
SCH_LINE* segment;
if( s_wires.GetCount() == 0 )
return;
segment = (SCH_LINE*) s_wires.begin();
EDA_COLOR_T color = GetLayerColor( segment->GetLayer() );
ColorChangeHighlightFlag( &color, !(color & HIGHLIGHT_FLAG) );
if( aErase )
{
while( segment )
{
if( !segment->IsNull() ) // Redraw if segment length != 0
segment->Draw( aPanel, aDC, wxPoint( 0, 0 ), g_XorMode, color );
segment = segment->Next();
}
}
SCH_EDIT_FRAME* frame = (SCH_EDIT_FRAME*) aPanel->GetParent();
wxPoint endpos = frame->GetCrossHairPosition();
if( frame->GetForceHVLines() ) /* Coerce the line to vertical or horizontal one: */
ComputeBreakPoint( (SCH_LINE*) s_wires.GetLast()->Back(), endpos );
else
( (SCH_LINE*) s_wires.GetLast() )->SetEndPoint( endpos );
segment = (SCH_LINE*) s_wires.begin();
while( segment )
{
if( !segment->IsNull() ) // Redraw if segment length != 0
segment->Draw( aPanel, aDC, wxPoint( 0, 0 ), g_XorMode, color );
segment = segment->Next();
}
}
void SCH_EDIT_FRAME::BeginSegment( wxDC* DC, int type )
{
SCH_LINE* segment;
SCH_LINE* nextSegment;
wxPoint cursorpos = GetCrossHairPosition();
// We should know if a segment is currently in progress
segment = (SCH_LINE*) GetScreen()->GetCurItem();
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if( segment ) // a current item exists, but not necessary a currently edited item
{
if( !segment->GetFlags() || ( segment->Type() != SCH_LINE_T ) )
{
if( segment->GetFlags() )
{
wxLogDebug( wxT( "BeginSegment: item->GetFlags()== %X" ),
segment->GetFlags() );
}
// no wire, bus or graphic line in progress
segment = NULL;
}
}
if( !segment ) // first point : Create the first wire or bus segment
{
switch( type )
{
default:
segment = new SCH_LINE( cursorpos, LAYER_NOTES );
break;
case LAYER_WIRE:
segment = new SCH_LINE( cursorpos, LAYER_WIRE );
/* A junction will be created later, when we'll know the
* segment end position, and if the junction is really needed */
break;
case LAYER_BUS:
segment = new SCH_LINE( cursorpos, LAYER_BUS );
break;
}
segment->SetFlags( IS_NEW );
s_wires.PushBack( segment );
GetScreen()->SetCurItem( segment );
// We need 2 segments to go from a given start pin to an end point when the horizontal
// and vertical lines only switch is on.
if( GetForceHVLines() )
{
nextSegment = new SCH_LINE( *segment );
nextSegment->SetFlags( IS_NEW );
s_wires.PushBack( nextSegment );
GetScreen()->SetCurItem( nextSegment );
}
m_canvas->SetMouseCapture( DrawSegment, AbortCreateNewLine );
SetRepeatItem( NULL );
}
else // A segment is in progress: terminates the current segment and add a new segment.
{
SCH_LINE* prevSegment = segment->Back();
// Be aware prevSegment can be null when the horizontal and vertical lines only switch is off
// when we create the first segment.
if( !GetForceHVLines() )
{
// If only one segment is needed and it has a zero length, do not create a new one.
if( segment->IsNull() )
return;
}
else
{
wxCHECK_RET( prevSegment != NULL, wxT( "Failed to create second line segment." ) );
// If two segments are required and they both have zero length, do not
// create a new one.
if( prevSegment && prevSegment->IsNull() && segment->IsNull() )
return;
}
m_canvas->CallMouseCapture( DC, wxDefaultPosition, false );
// Terminate the command if the end point is on a pin, junction, or another wire or bus.
if( GetScreen()->IsTerminalPoint( cursorpos, segment->GetLayer() ) )
{
EndSegment( DC );
return;
}
// Create a new segment, and chain it after the current new segment.
nextSegment = new SCH_LINE( *segment );
nextSegment->SetStartPoint( cursorpos );
s_wires.PushBack( nextSegment );
segment->SetEndPoint( cursorpos );
segment->ClearFlags( IS_NEW );
segment->SetFlags( SELECTED );
nextSegment->SetFlags( IS_NEW );
GetScreen()->SetCurItem( nextSegment );
m_canvas->CallMouseCapture( DC, wxDefaultPosition, false );
}
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}
void SCH_EDIT_FRAME::EndSegment( wxDC* DC )
{
SCH_SCREEN* screen = GetScreen();
SCH_LINE* segment = (SCH_LINE*) screen->GetCurItem();
if( segment == NULL || segment->Type() != SCH_LINE_T || !segment->IsNew() )
return;
// Delete zero length segments and clear item flags.
SCH_ITEM* item = s_wires.begin();
while( item )
{
item->ClearFlags();
wxCHECK_RET( item->Type() == SCH_LINE_T, wxT( "Unexpected object type in wire list." ) );
segment = (SCH_LINE*) item;
item = item->Next();
if( segment->IsNull() )
delete s_wires.Remove( segment );
}
if( s_wires.GetCount() == 0 )
return;
// Get the last non-null wire (this is the last created segment).
SetRepeatItem( segment = (SCH_LINE*) s_wires.GetLast() );
screen->SetCurItem( NULL );
m_canvas->EndMouseCapture( -1, -1, wxEmptyString, false );
// store the terminal point of this last segment: a junction could be needed
// (the last wire could be merged/deleted/modified, and lost)
wxPoint endpoint = segment->GetEndPoint();
// store the starting point of this first segment: a junction could be needed
SCH_LINE* firstsegment = (SCH_LINE*) s_wires.GetFirst();
wxPoint startPoint = firstsegment->GetStartPoint();
// Save the old wires for the undo command
DLIST< SCH_ITEM > oldWires; // stores here the old wires
GetScreen()->ExtractWires( oldWires, true ); // Save them in oldWires list
// Put the snap shot of the previous wire, buses, and junctions in the undo/redo list.
PICKED_ITEMS_LIST oldItems;
oldItems.m_Status = UR_WIRE_IMAGE;
while( oldWires.GetCount() != 0 )
{
ITEM_PICKER picker = ITEM_PICKER( oldWires.PopFront(), UR_WIRE_IMAGE );
oldItems.PushItem( picker );
}
SaveCopyInUndoList( oldItems, UR_WIRE_IMAGE );
// Remove segments backtracking over others
RemoveBacktracks( s_wires );
// Add the new wires
screen->Append( s_wires );
// Correct and remove segments that need to be merged.
screen->SchematicCleanUp( NULL, DC );
// A junction could be needed to connect the end point of the last created segment.
if( screen->IsJunctionNeeded( endpoint ) )
screen->Append( AddJunction( DC, endpoint ) );
// A junction could be needed to connect the start point of the set of new created wires
if( screen->IsJunctionNeeded( startPoint ) )
screen->Append( AddJunction( DC, startPoint ) );
m_canvas->Refresh();
OnModify();
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}
/**
* Function ComputeBreakPoint
* computes the middle coordinate for 2 segments from the start point to \a aPosition
* with the segments kept in the horizontal or vertical axis only.
*
* @param aSegment A pointer to a #SCH_LINE object containing the first line break point
* to compute.
* @param aPosition A reference to a wxPoint object containing the coordinates of the
* position used to calculate the line break point.
*/
static void ComputeBreakPoint( SCH_LINE* aSegment, const wxPoint& aPosition )
{
wxCHECK_RET( aSegment != NULL, wxT( "Cannot compute break point of NULL line segment." ) );
SCH_LINE* nextSegment = aSegment->Next();
wxPoint midPoint = aPosition;
wxCHECK_RET( nextSegment != NULL,
wxT( "Cannot compute break point of NULL second line segment." ) );
#if 0
if( ABS( midPoint.x - aSegment->GetStartPoint().x ) <
ABS( midPoint.y - aSegment->GetStartPoint().y ) )
midPoint.x = aSegment->GetStartPoint().x;
else
midPoint.y = aSegment->GetStartPoint().y;
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#else
int iDx = aSegment->GetEndPoint().x - aSegment->GetStartPoint().x;
int iDy = aSegment->GetEndPoint().y - aSegment->GetStartPoint().y;
if( iDy != 0 ) // keep the first segment orientation (currently horizontal)
{
midPoint.x = aSegment->GetStartPoint().x;
}
else if( iDx != 0 ) // keep the first segment orientation (currently vertical)
{
midPoint.y = aSegment->GetStartPoint().y;
}
else
{
if( std::abs( midPoint.x - aSegment->GetStartPoint().x ) <
std::abs( midPoint.y - aSegment->GetStartPoint().y ) )
midPoint.x = aSegment->GetStartPoint().x;
else
midPoint.y = aSegment->GetStartPoint().y;
}
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#endif
aSegment->SetEndPoint( midPoint );
nextSegment->SetStartPoint( midPoint );
nextSegment->SetEndPoint( aPosition );
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}
void SCH_EDIT_FRAME::DeleteCurrentSegment( wxDC* DC )
{
SCH_SCREEN* screen = GetScreen();
SetRepeatItem( NULL );
if( ( screen->GetCurItem() == NULL ) || !screen->GetCurItem()->IsNew() )
return;
DrawSegment( m_canvas, DC, wxDefaultPosition, false );
screen->Remove( screen->GetCurItem() );
m_canvas->SetMouseCaptureCallback( NULL );
screen->SetCurItem( NULL );
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}
SCH_JUNCTION* SCH_EDIT_FRAME::AddJunction( wxDC* aDC, const wxPoint& aPosition,
bool aPutInUndoList )
{
SCH_JUNCTION* junction = new SCH_JUNCTION( aPosition );
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SetRepeatItem( junction );
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m_canvas->CrossHairOff( aDC ); // Erase schematic cursor
junction->Draw( m_canvas, aDC, wxPoint( 0, 0 ), GR_DEFAULT_DRAWMODE );
m_canvas->CrossHairOn( aDC ); // Display schematic cursor
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if( aPutInUndoList )
{
GetScreen()->Append( junction );
SaveCopyInUndoList( junction, UR_NEW );
OnModify();
}
return junction;
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}
SCH_NO_CONNECT* SCH_EDIT_FRAME::AddNoConnect( wxDC* aDC, const wxPoint& aPosition )
{
SCH_NO_CONNECT* no_connect = new SCH_NO_CONNECT( aPosition );
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SetRepeatItem( no_connect );
GetScreen()->Append( no_connect );
GetScreen()->SchematicCleanUp( m_canvas, aDC );
OnModify();
m_canvas->Refresh();
SaveCopyInUndoList( no_connect, UR_NEW );
return no_connect;
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}
/* Abort function for wire, bus or line creation
*/
static void AbortCreateNewLine( EDA_DRAW_PANEL* aPanel, wxDC* aDC )
{
SCH_SCREEN* screen = (SCH_SCREEN*) aPanel->GetScreen();
if( screen->GetCurItem() )
{
s_wires.DeleteAll(); // Free the list, for a future usage
screen->SetCurItem( NULL );
aPanel->Refresh();
}
else
{
SCH_EDIT_FRAME* parent = ( SCH_EDIT_FRAME* ) aPanel->GetParent();
parent->SetRepeatItem( NULL );
}
// Clear flags used in edit functions.
screen->ClearDrawingState();
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}
void SCH_EDIT_FRAME::RepeatDrawItem( wxDC* DC )
{
SCH_ITEM* repeater = GetRepeatItem();
if( !repeater )
return;
//D( repeater>Show( 0, std::cout ); )
// clone the repeater, move it, insert into display list, then save a copy
// via SetRepeatItem();
SCH_ITEM* my_clone = (SCH_ITEM*) repeater->Clone();
// If cloning a component then put into 'move' mode.
if( my_clone->Type() == SCH_COMPONENT_T )
{
wxPoint pos = GetCrossHairPosition() -
( (SCH_COMPONENT*) my_clone )->GetPosition();
my_clone->SetFlags( IS_NEW );
( (SCH_COMPONENT*) my_clone )->SetTimeStamp( GetNewTimeStamp() );
my_clone->Move( pos );
my_clone->Draw( m_canvas, DC, wxPoint( 0, 0 ), g_XorMode );
PrepareMoveItem( my_clone, DC );
}
else
{
my_clone->Move( GetRepeatStep() );
if( my_clone->CanIncrementLabel() )
( (SCH_TEXT*) my_clone )->IncrementLabel( GetRepeatDeltaLabel() );
GetScreen()->Append( my_clone );
GetScreen()->TestDanglingEnds();
my_clone->Draw( m_canvas, DC, wxPoint( 0, 0 ), GR_DEFAULT_DRAWMODE );
SaveCopyInUndoList( my_clone, UR_NEW );
my_clone->ClearFlags();
}
// clone my_clone, now that it has been moved, thus saving new position.
SetRepeatItem( my_clone );
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}