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kicad/eeschema/locate.cpp

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/******************************************************/
/* Routines for locating an element of a schematic. */
/******************************************************/
#include "fctsys.h"
#include "common.h"
#include "trigo.h"
#include "macros.h"
#include "class_sch_screen.h"
#include "general.h"
#include "protos.h"
#include "class_library.h"
#include "sch_bus_entry.h"
#include "sch_marker.h"
#include "sch_items.h"
#include "sch_component.h"
#include "sch_line.h"
#include "sch_no_connect.h"
#include "sch_polyline.h"
#include "sch_sheet.h"
#include "lib_pin.h"
#include "template_fieldnames.h"
static SCH_ITEM* LastSnappedStruct = NULL;
static bool SnapPoint2( const wxPoint& aPosRef, int SearchMask, SCH_ITEM* DrawList );
/**
* Search the smaller (considering its area) component under the mouse
* cursor or the pcb cursor
*
* If more than 1 component is found, a pointer to the smaller component is
* returned
*/
SCH_COMPONENT* LocateSmallestComponent( SCH_SCREEN* Screen )
{
SCH_COMPONENT* component = NULL, * lastcomponent = NULL;
SCH_ITEM* DrawList;
EDA_Rect BoundaryBox;
float sizeref = 0, sizecurr;
DrawList = Screen->GetDrawItems();
while( DrawList )
{
if( !SnapPoint2( Screen->m_MousePosition, LIBITEM, DrawList ) )
{
if( !SnapPoint2( Screen->m_Curseur, LIBITEM, DrawList ) )
break;
}
component = (SCH_COMPONENT*) LastSnappedStruct;
DrawList = component->Next();
if( lastcomponent == NULL ) // First time a component is located
{
lastcomponent = component;
BoundaryBox = lastcomponent->GetBoundingBox();
sizeref = ABS( (float) BoundaryBox.GetWidth() * BoundaryBox.GetHeight() );
}
else
{
BoundaryBox = component->GetBoundingBox();
sizecurr = ABS( (float) BoundaryBox.GetWidth() * BoundaryBox.GetHeight() );
if( sizeref > sizecurr ) // a smallest component is found
{
sizeref = sizecurr;
lastcomponent = component;
}
}
}
return lastcomponent;
}
/* Search an item at pos refpos
* SearchMask = (bitwise OR):
* LIBITEM
* WIREITEM
* BUSITEM
* RACCORDITEM
* JUNCTIONITEM
* DRAWITEM
* TEXTITEM
* LABELITEM
* SHEETITEM
* MARKERITEM
* NOCONNECTITEM
* SEARCH_PINITEM
* SHEETLABELITEM
* FIELDCMPITEM
*
* if EXCLUDE_WIRE_BUS_ENDPOINTS is set, in wire or bus search and locate,
* start and end points are not included in search
* if WIRE_BUS_ENDPOINTS_ONLY is set, in wire or bus search and locate,
* only start and end points are included in search
*
*
* Return:
* pointer on item found or NULL
*
*/
SCH_ITEM* PickStruct( const wxPoint& refpos, SCH_SCREEN* screen, int SearchMask )
{
if( screen == NULL || screen->GetDrawItems() == NULL )
return NULL;
if( SnapPoint2( refpos, SearchMask, screen->GetDrawItems() ) )
{
return LastSnappedStruct;
}
return NULL;
}
/**
* Function PickStruct
* Search items in a block
* @return items count
* @param aBlock a BLOCK_SELECTOR that gives the search area boundary
* @param aScreen - The screen to pick items from.
* list of items is stored in aBlock
*/
int PickItemsInBlock( BLOCK_SELECTOR& aBlock, SCH_SCREEN* aScreen )
{
int itemcount = 0;
if( aScreen == NULL )
return itemcount;
EDA_Rect area;
area.SetOrigin( aBlock.GetOrigin());
area.SetSize( aBlock.GetSize() );
area.Normalize();
ITEM_PICKER picker;
SCH_ITEM* item = aScreen->GetDrawItems();
for( ; item != NULL; item = item->Next() )
{
// an item is picked if its bounding box intersects the reference area
if( item->HitTest( area ) )
{
/* Put this structure in the picked list: */
picker.m_PickedItem = item;
picker.m_PickedItemType = item->Type();
aBlock.PushItem( picker );
itemcount++;
}
}
return itemcount;
}
/*****************************************************************************
* Routine to search all objects for the closest point to a given point, in *
* drawing space, and snap it to that points if closer than SnapDistance. *
* Note we use L1 norm as distance measure, as it is the fastest. *
* This routine updates LastSnappedStruct to the last object used in to snap *
* a point. This variable is global to this module only (see above). *
* The routine returns true if point was snapped. *
*****************************************************************************/
bool SnapPoint2( const wxPoint& aPosRef, int SearchMask, SCH_ITEM* DrawList )
{
for( ; DrawList != NULL; DrawList = DrawList->Next() )
{
int hitminDist = MAX( g_DrawDefaultLineThickness, 3 );
switch( DrawList->Type() )
{
case SCH_POLYLINE_T:
#undef STRUCT
#define STRUCT ( (SCH_POLYLINE*) DrawList )
if( !( SearchMask & (DRAWITEM | WIREITEM | BUSITEM) ) )
break;
for( unsigned i = 0; i < STRUCT->GetCornerCount() - 1; i++ )
{
if( TestSegmentHit( aPosRef, STRUCT->m_PolyPoints[i],
STRUCT->m_PolyPoints[i + 1], hitminDist ) )
{
LastSnappedStruct = DrawList;
return true;
}
}
break;
case SCH_LINE_T:
#undef STRUCT
#define STRUCT ( (SCH_LINE*) DrawList )
if( !( SearchMask & (DRAWITEM | WIREITEM | BUSITEM) ) )
break;
if( TestSegmentHit( aPosRef, STRUCT->m_Start, STRUCT->m_End, 0 ) )
{
if( ( ( SearchMask & DRAWITEM ) && ( STRUCT->GetLayer() == LAYER_NOTES ) )
|| ( ( SearchMask & WIREITEM ) && ( STRUCT->GetLayer() == LAYER_WIRE ) )
|| ( ( SearchMask & BUSITEM ) && ( STRUCT->GetLayer() == LAYER_BUS ) ) )
{
if( SearchMask & EXCLUDE_WIRE_BUS_ENDPOINTS && STRUCT->IsEndPoint( aPosRef ) )
break;
if( SearchMask & WIRE_BUS_ENDPOINTS_ONLY && !STRUCT->IsEndPoint( aPosRef ) )
break;
LastSnappedStruct = DrawList;
return true;
}
}
break;
case SCH_BUS_ENTRY_T:
#undef STRUCT
#define STRUCT ( (SCH_BUS_ENTRY*) DrawList )
if( !( SearchMask & (RACCORDITEM) ) )
break;
if( TestSegmentHit( aPosRef, STRUCT->m_Pos, STRUCT->m_End(), hitminDist ) )
{
LastSnappedStruct = DrawList;
return true;
}
break;
case SCH_JUNCTION_T:
#undef STRUCT
#define STRUCT ( (SCH_JUNCTION*) DrawList )
if( !(SearchMask & JUNCTIONITEM) )
break;
if( STRUCT->HitTest( aPosRef ) )
{
LastSnappedStruct = DrawList;
return true;
}
break;
case SCH_NO_CONNECT_T:
#undef STRUCT
#define STRUCT ( (SCH_NO_CONNECT*) DrawList )
if( !(SearchMask & NOCONNECTITEM) )
break;
if( STRUCT->HitTest( aPosRef ) )
{
LastSnappedStruct = DrawList;
return true;
}
break;
case SCH_MARKER_T:
{
#undef STRUCT
#define STRUCT ( (SCH_MARKER*) DrawList )
if( !(SearchMask & MARKERITEM) )
break;
if( STRUCT->HitTest( aPosRef ) )
{
LastSnappedStruct = DrawList;
return true;
}
break;
}
case SCH_TEXT_T:
#undef STRUCT
#define STRUCT ( (SCH_TEXT*) DrawList )
if( !( SearchMask & TEXTITEM) )
break;
if( STRUCT->HitTest( aPosRef ) )
{
LastSnappedStruct = DrawList;
return true;
}
break;
case SCH_LABEL_T:
case SCH_GLOBAL_LABEL_T:
case SCH_HIERARCHICAL_LABEL_T:
#undef STRUCT
#define STRUCT ( (SCH_TEXT*) DrawList ) // SCH_TEXT is the base
// class of these labels
if( !(SearchMask & LABELITEM) )
break;
if( STRUCT->HitTest( aPosRef ) )
{
LastSnappedStruct = DrawList;
return true;
}
break;
case SCH_COMPONENT_T:
if( !( SearchMask & (LIBITEM | FIELDCMPITEM) ) )
break;
if( SearchMask & FIELDCMPITEM )
{
SCH_COMPONENT* DrawLibItem = (SCH_COMPONENT*) DrawList;
for( int i = REFERENCE; i < DrawLibItem->GetFieldCount(); i++ )
{
SCH_FIELD* field = DrawLibItem->GetField( i );
if( field->m_Attributs & TEXT_NO_VISIBLE )
continue;
if( field->IsVoid() )
continue;
EDA_Rect BoundaryBox = field->GetBoundingBox();
if( BoundaryBox.Contains( aPosRef ) )
{
LastSnappedStruct = field;
return true;
}
}
}
else
{
#undef STRUCT
#define STRUCT ( (SCH_COMPONENT*) DrawList )
EDA_Rect BoundaryBox = STRUCT->GetBoundingBox();
if( BoundaryBox.Contains( aPosRef ) )
{
LastSnappedStruct = DrawList;
return true;
}
}
break;
case SCH_SHEET_T:
#undef STRUCT
#define STRUCT ( (SCH_SHEET*) DrawList )
if( !(SearchMask & SHEETITEM) )
break;
if( STRUCT->HitTest( aPosRef ) )
{
LastSnappedStruct = DrawList;
return true;
}
break;
default:
{
wxString msg;
msg.Printf( wxT( "SnapPoint2() error: unexpected struct type %d (" ),
DrawList->Type() );
msg << DrawList->GetClass() << wxT( ")" );
wxMessageBox( msg );
break;
}
}
}
return FALSE;
}
SCH_SHEET_PIN* LocateSheetLabel( SCH_SHEET* Sheet, const wxPoint& pos )
{
return Sheet->GetLabel( pos );
}
LIB_PIN* LocateAnyPin( SCH_ITEM* DrawList, const wxPoint& RefPos, SCH_COMPONENT** libpart )
{
SCH_ITEM* item;
SCH_COMPONENT* component = NULL;
LIB_PIN* pin = NULL;
for( item = DrawList; item != NULL; item = item->Next() )
{
if( item->Type() != SCH_COMPONENT_T )
continue;
component = (SCH_COMPONENT*) item;
pin = (LIB_PIN*) component->GetDrawItem( RefPos, LIB_PIN_T );
if( pin )
break;
}
if( libpart )
*libpart = component;
return pin;
}
SCH_SHEET_PIN* LocateAnyPinSheet( const wxPoint& RefPos, SCH_ITEM* DrawList )
{
SCH_ITEM* DrawStruct;
SCH_SHEET_PIN* PinSheet = NULL;
for( DrawStruct = DrawList; DrawStruct != NULL; DrawStruct = DrawStruct->Next() )
{
if( DrawStruct->Type() != SCH_SHEET_T )
continue;
PinSheet = LocateSheetLabel( (SCH_SHEET*) DrawStruct, RefPos );
if( PinSheet )
break;
}
return PinSheet;
}
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