picker_tool.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 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 <tool/actions.h>
#include <tool/picker_tool.h>
#include <view/view_controls.h>
#include <eda_draw_frame.h>


void PICKER_TOOL_BASE::reset()
{
 m_cursor = KICURSOR::ARROW;
 m_snap = true;

 m_picked = NULLOPT;
 m_clickHandler = NULLOPT;
 m_motionHandler = NULLOPT;
 m_cancelHandler = NULLOPT;
 m_finalizeHandler = NULLOPT;
}


PICKER_TOOL::PICKER_TOOL( const std::string& aName ) :
 TOOL_INTERACTIVE( aName ),
 PICKER_TOOL_BASE()
{
}


PICKER_TOOL::PICKER_TOOL() :
 TOOL_INTERACTIVE( "common.InteractivePicker" ),
 PICKER_TOOL_BASE()
{
}


bool PICKER_TOOL::Init()
{
 m_frame = getEditFrame<EDA_DRAW_FRAME>();

 auto& ctxMenu = m_menu.GetMenu();

 // cancel current tool goes in main context menu at the top if present
 ctxMenu.AddItem( ACTIONS::cancelInteractive, SELECTION_CONDITIONS::ShowAlways, 1 );
 ctxMenu.AddSeparator( 1 );

 // Finally, add the standard zoom/grid items
 m_frame->AddStandardSubMenus( m_menu );

 return true;
}


int PICKER_TOOL::Main( const TOOL_EVENT& aEvent )
{
 KIGFX::VIEW_CONTROLS* controls = getViewControls();
 int finalize_state = WAIT_CANCEL;

 std::string tool = *aEvent.Parameter<std::string*>();
 m_frame->PushTool( tool );
 Activate();

 setControls();

 auto setCursor =
 [&]()
 {
 m_frame->GetCanvas()->SetCurrentCursor( m_cursor );
 };

 // Set initial cursor
 setCursor();

 while( TOOL_EVENT* evt = Wait() )
 {
 setCursor();
 VECTOR2D cursorPos = controls->GetCursorPosition( m_snap && m_frame->IsGridVisible() );

 if( evt->IsCancelInteractive() || evt->IsActivate() )
 {
 if( m_cancelHandler )
 {
 try
 {
 (*m_cancelHandler)();
 }
 catch( std::exception& )
 {
 }
 }

 // Activating a new tool may have alternate finalization from canceling the current
 // tool
 if( evt->IsActivate() )
 {
 finalize_state = END_ACTIVATE;
 }
 else
 {
 evt->SetPassEvent( false );
 finalize_state = EVT_CANCEL;
 }

 break;
 }

 else if( evt->IsClick( BUT_LEFT ) )
 {
 bool getNext = false;

 m_picked = cursorPos;

 if( m_clickHandler )
 {
 try
 {
 getNext = (*m_clickHandler)( *m_picked );
 }
 catch( std::exception& )
 {
 finalize_state = EXCEPTION_CANCEL;
 break;
 }
 }

 if( !getNext )
 {
 finalize_state = CLICK_CANCEL;
 break;
 }
 else
 setControls();
 }

 else if( evt->IsMotion() )
 {
 if( m_motionHandler )
 {
 try
 {
 (*m_motionHandler)( cursorPos );
 }
 catch( std::exception& )
 {
 }
 }
 }

 else if( evt->IsDblClick( BUT_LEFT ) || evt->IsDrag( BUT_LEFT ) )
 {
 // Not currently used, but we don't want to pass them either
 }

 else if( evt->IsClick( BUT_RIGHT ) )
 {
 m_menu.ShowContextMenu();
 }

 else
 evt->SetPassEvent();
 }

 if( m_finalizeHandler )
 {
 try
 {
 (*m_finalizeHandler)( finalize_state );
 }
 catch( std::exception& )
 {
 }
 }

 reset();
 controls->ForceCursorPosition( false );
 m_frame->PopTool( tool );
 return 0;
}


void PICKER_TOOL::setTransitions()
{
 Go( &PICKER_TOOL::Main, ACTIONS::pickerTool.MakeEvent() );
}


void PICKER_TOOL::setControls()
{
 KIGFX::VIEW_CONTROLS* controls = getViewControls();

 controls->CaptureCursor( false );
 controls->SetAutoPan( false );
}