kicad/common/tool/zoom_tool.cpp

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/*
* This program source code file is part of KiCad, a free EDA CAD application.
*
* Copyright (C) 2017 KiCad Developers, see AUTHORS.txt for contributors.
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*
* 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 3 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, see <http://www.gnu.org/licenses/>.
*/
#include <class_draw_panel_gal.h>
#include <eda_draw_frame.h>
#include <id.h>
#include <preview_items/selection_area.h>
#include <tool/actions.h>
#include <tool/tool_manager.h>
#include <tool/zoom_tool.h>
#include <view/view.h>
#include <view/view_controls.h>
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ZOOM_TOOL::ZOOM_TOOL() :
TOOL_INTERACTIVE( "common.Control.zoomTool" )
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{
m_frame = NULL;
}
ZOOM_TOOL::~ZOOM_TOOL() {}
void ZOOM_TOOL::Reset( RESET_REASON aReason )
{
m_frame = getEditFrame<EDA_DRAW_FRAME>();
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}
int ZOOM_TOOL::Main( const TOOL_EVENT& aEvent )
{
std::string tool = aEvent.GetCommandStr().get();
m_frame->PushTool( tool );
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auto setCursor =
[&]()
{
m_frame->GetCanvas()->SetCurrentCursor( KICURSOR::ZOOM_IN );
};
// Set initial cursor
setCursor();
while( TOOL_EVENT* evt = Wait() )
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{
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setCursor();
if( evt->IsCancelInteractive() || evt->IsActivate() )
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break;
else if( evt->IsDrag( BUT_LEFT ) || evt->IsDrag( BUT_RIGHT ) )
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{
if( selectRegion() )
break;
}
else
evt->SetPassEvent();
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}
// Exit zoom tool
m_frame->PopTool( tool );
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return 0;
}
bool ZOOM_TOOL::selectRegion()
{
bool cancelled = false;
KIGFX::VIEW* view = getView();
EDA_DRAW_PANEL_GAL* canvas = m_frame->GetCanvas();
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getViewControls()->SetAutoPan( true );
KIGFX::PREVIEW::SELECTION_AREA area;
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view->Add( &area );
while( TOOL_EVENT* evt = Wait() )
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{
if( evt->IsCancelInteractive() || evt->IsActivate() )
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{
cancelled = true;
break;
}
if( evt->IsDrag( BUT_LEFT ) || evt->IsDrag( BUT_RIGHT ) )
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{
area.SetOrigin( evt->DragOrigin() );
area.SetEnd( evt->Position() );
view->SetVisible( &area, true );
view->Update( &area, KIGFX::GEOMETRY );
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}
if( evt->IsMouseUp( BUT_LEFT ) || evt->IsMouseUp( BUT_RIGHT ) )
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{
view->SetVisible( &area, false );
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auto selectionBox = area.ViewBBox();
if( selectionBox.GetWidth() == 0 || selectionBox.GetHeight() == 0 )
{
break;
}
else
{
VECTOR2D sSize = view->ToWorld( canvas->GetClientSize(), false );
VECTOR2D vSize = selectionBox.GetSize();
double scale;
double ratio = std::max( fabs( vSize.x / sSize.x ), fabs( vSize.y / sSize.y ) );
if( evt->IsMouseUp( BUT_LEFT ) )
scale = view->GetScale() / ratio;
else
scale = view->GetScale() * ratio;
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view->SetScale( scale );
view->SetCenter( selectionBox.Centre() );
break;
}
}
}
view->SetVisible( &area, false );
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view->Remove( &area );
getViewControls()->SetAutoPan( false );
return cancelled;
}
void ZOOM_TOOL::setTransitions()
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{
Go( &ZOOM_TOOL::Main, ACTIONS::zoomTool.MakeEvent() );
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}