kicad/pagelayout_editor/tools/pl_selection_tool.h

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/*
* This program source code file is part of KiCad, a free EDA CAD application.
*
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* 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
*/
#ifndef PL_SELECTION_TOOL_H
#define PL_SELECTION_TOOL_H
#include <tool/tool_interactive.h>
#include <tool/tool_menu.h>
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#include "tools/pl_selection.h"
class PL_EDITOR_FRAME;
class SCH_ITEM;
class COLLECTOR;
namespace KIGFX
{
class GAL;
}
class PL_SELECTION_TOOL : public TOOL_INTERACTIVE
{
public:
PL_SELECTION_TOOL();
~PL_SELECTION_TOOL() override { }
/// @copydoc TOOL_BASE::Init()
bool Init() override;
/// @copydoc TOOL_INTERACTIVE::Reset()
void Reset( RESET_REASON aReason ) override;
int UpdateMenu( const TOOL_EVENT& aEvent );
/**
* The main loop.
*/
int Main( const TOOL_EVENT& aEvent );
/**
* Return the set of currently selected items.
*/
PL_SELECTION& GetSelection();
/**
* Return either an existing selection (filtered), or the selection at the current
* cursor if the existing selection is empty.
*/
PL_SELECTION& RequestSelection();
/**
* Select an item pointed by the parameter aWhere. If there is more than one item at that
* place, there is a menu displayed that allows one to choose the item.
*
* @param aWhere is the place where the item should be selected.
* @param aSelectionCancelledFlag allows the function to inform its caller that a selection
* was canceled (for instance, by clicking outside of the
* disambiguation menu).
*/
void SelectPoint( const VECTOR2I& aWhere, bool* aSelectionCancelledFlag = nullptr );
int AddItemToSel( const TOOL_EVENT& aEvent );
void AddItemToSel( EDA_ITEM* aItem, bool aQuietMode = false );
int AddItemsToSel( const TOOL_EVENT& aEvent );
void AddItemsToSel( EDA_ITEMS* aList, bool aQuietMode = false );
int RemoveItemFromSel( const TOOL_EVENT& aEvent );
void RemoveItemFromSel( EDA_ITEM* aItem, bool aQuietMode = false );
int RemoveItemsFromSel( const TOOL_EVENT& aEvent );
void RemoveItemsFromSel( EDA_ITEMS* aList, bool aQuietMode = false );
void BrightenItem( EDA_ITEM* aItem );
void UnbrightenItem( EDA_ITEM* aItem );
int ClearSelection( const TOOL_EVENT& aEvent );
void ClearSelection();
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/**
* Rebuild the selection from the flags in the view items. Useful after a hard redraw
* or an undo or redo operation.
*/
void RebuildSelection();
/**
* Shows a popup menu to trim the COLLECTOR passed as aEvent's parameter down to a single
* item.
*
* @note This routine **does not** modify the selection.
*/
int SelectionMenu( const TOOL_EVENT& aEvent );
private:
/**
* Handle drawing a selection box that allows one to select many items at the same time.
*
* @return true if the function was canceled (i.e. CancelEvent was received).
*/
bool selectMultiple();
/**
* Apply heuristics to try and determine a single object when multiple are found under the
* cursor.
*/
void guessSelectionCandidates( COLLECTOR& collector, const VECTOR2I& aWhere );
/**
* Allow the selection of a single item from a list via pop-up menu. The items are
* highlighted on the canvas when hovered in the menu. The collector is trimmed to
* the picked item.
*
* @return true if an item was picked.
*/
bool doSelectionMenu( COLLECTOR* aItems );
/**
* Takes necessary action mark an item as selected.
*
* @param aItem is an item to be selected.
*/
void select( EDA_ITEM* aItem );
/**
* Take necessary action mark an item as unselected.
*
* @param aItem is an item to be unselected.
*/
void unselect( EDA_ITEM* aItem );
/**
* Highlight the item visually.
*
* @param aItem is an item to be be highlighted.
* @param aHighlightMode should be either SELECTED or BRIGHTENED
* @param aGroup is the group to add the item to in the BRIGHTENED mode.
*/
void highlight( EDA_ITEM* aItem, int aHighlightMode, PL_SELECTION* aGroup = nullptr );
/**
* Unhighlight the item visually.
*
* @param aItem is an item to be be highlighted.
* @param aHighlightMode should be either SELECTED or BRIGHTENED
* @param aGroup is the group to remove the item from.
*/
void unhighlight( EDA_ITEM* aItem, int aHighlightMode, PL_SELECTION* aGroup = nullptr );
/**
* @return True if the given point is contained in any of selected items' bounding box.
*/
bool selectionContains( const VECTOR2I& aPoint ) const;
///< Set up handlers for various events.
void setTransitions() override;
private:
PL_EDITOR_FRAME* m_frame; // Pointer to the parent frame
PL_SELECTION m_selection; // Current state of selection
bool m_additive; // Items should be added to selection (instead of replacing)
bool m_subtractive; // Items should be removed from selection
bool m_exclusive_or; // Items' selection state should be toggled
bool m_multiple; // Multiple selection mode is active
bool m_skip_heuristics; // Heuristics are not allowed when choosing item under cursor
};
#endif //PL_SELECTION_TOOL_H