246 lines
7.4 KiB
C++
246 lines
7.4 KiB
C++
/*
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* This program source code file is part of KiCad, a free EDA CAD application.
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*
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* Copyright (C) 2012 Torsten Hueter, torstenhtr <at> gmx.de
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* Copyright (C) 2013 CERN
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* @author Tomasz Wlostowski <tomasz.wlostowski@cern.ch>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, you may find one here:
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* http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
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* or you may search the http://www.gnu.org website for the version 2 license,
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* or you may write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
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*
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*/
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/**
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* @file view_controls.h
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* @brief VIEW_CONTROLS class definition.
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*/
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#ifndef __VIEW_CONTROLS_H
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#define __VIEW_CONTROLS_H
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#include <math/box2.h>
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namespace KIGFX
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{
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class VIEW;
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/**
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* Class VIEW_CONTROLS
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* is an interface for classes handling user events controlling the view behaviour
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* (such as zooming, panning, mouse grab, etc.)
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*/
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class VIEW_CONTROLS
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{
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public:
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VIEW_CONTROLS( VIEW* aView ) : m_view( aView ),
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m_forceCursorPosition( false ), m_cursorCaptured( false ), m_snappingEnabled( false ),
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m_grabMouse( false ), m_autoPanEnabled( false ), m_autoPanMargin( 0.1 ),
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m_autoPanSpeed( 0.15 ), m_warpCursor( false )
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{
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}
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virtual ~VIEW_CONTROLS()
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{}
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/**
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* Function SetSnapping()
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* Enables/disables snapping cursor to grid.
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*
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* @param aEnabled says whether the opion should be enabled or disabled.
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*/
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virtual void SetSnapping( bool aEnabled )
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{
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m_snappingEnabled = aEnabled;
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}
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/**
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* Function SetGrabMouse
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* Turns on/off mouse grabbing. When the mouse is grabbed, it cannot go outside the VIEW.
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* @param aEnabled tells if mouse should be grabbed or not.
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*/
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virtual void SetGrabMouse( bool aEnabled )
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{
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m_grabMouse = aEnabled;
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}
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/**
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* Function SetAutoPan
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* Turns on/off auto panning (this feature is used when there is a tool active (eg. drawing a
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* track) and user moves mouse to the VIEW edge - then the view can be translated or not).
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* @param aEnabled tells if the autopanning should be active.
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*/
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virtual void SetAutoPan( bool aEnabled )
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{
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m_autoPanEnabled = aEnabled;
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}
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/**
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* Function SetAutoPanSpeed()
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* Sets speed of autopanning.
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* @param aSpeed is a new speed for autopanning.
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*/
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virtual void SetAutoPanSpeed( float aSpeed )
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{
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m_autoPanSpeed = aSpeed;
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}
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/**
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* Function SetAutoPanMArgin()
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* Sets margin for autopanning (ie. the area when autopanning becomes active).
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* @param aMargin is a new margin for autopanning.
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*/
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virtual void SetAutoPanMargin( float aMargin )
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{
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m_autoPanMargin = aMargin;
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}
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/**
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* Function GetMousePosition()
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* Returns the current mouse pointer position in screen coordinates. Note, that it may be
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* different from the cursor position if snapping is enabled (@see GetCursorPosition()).
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*
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* @return The current mouse pointer position in the screen coordinates.
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*/
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virtual VECTOR2I GetMousePosition() const = 0;
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/**
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* Function GetCursorPosition()
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* Returns the current cursor position in world coordinates. Note, that it may be
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* different from the mouse pointer position if snapping is enabled or cursor position
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* is forced to specific point.
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*
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* @return The current cursor position in world coordinates.
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*/
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virtual VECTOR2D GetCursorPosition() const = 0;
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/**
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* Function ForceCursorPosition()
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* Places the cursor immediately at a given point. Mouse movement is ignored.
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* @param aEnabled enable forced cursor position
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* @param aPosition the position (world coordinates).
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*/
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virtual void ForceCursorPosition( bool aEnabled, const VECTOR2D& aPosition = VECTOR2D( 0, 0 ) )
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{
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m_forcedPosition = aPosition;
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m_forceCursorPosition = aEnabled;
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}
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/**
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* Function ShowCursor()
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* Enables or disables display of cursor.
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* @param aEnabled decides if the cursor should be shown.
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*/
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virtual void ShowCursor( bool aEnabled );
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/**
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* Function CaptureCursor()
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* Forces the cursor to stay within the drawing panel area.
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* @param aEnabled determines if the cursor should be captured.
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*/
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virtual void CaptureCursor( bool aEnabled )
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{
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m_cursorCaptured = aEnabled;
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}
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inline bool IsCursorPositionForced() const
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{
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return m_forceCursorPosition;
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}
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/**
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* Function WarpCursor()
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* If enabled (@see SetEnableCursorWarping(), warps the cursor to the specified position,
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* expressed either in the screen coordinates or the world coordinates.
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* @param aPosition is the position where the cursor should be warped.
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* @param aWorldCoordinates if true treats aPosition as the world coordinates, otherwise it
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* uses it as the screen coordinates.
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* @param aWarpView determines if the view can be warped too (only matters if the position is
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* specified in the world coordinates and its not visible in the current viewport).
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*/
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virtual void WarpCursor( const VECTOR2D& aPosition, bool aWorldCoordinates = false,
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bool aWarpView = false ) const = 0;
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/**
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* Function EnableCursorWarping()
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* Enables or disables warping the cursor.
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* @param aEnabled is true if the cursor is allowed to be warped.
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*/
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void EnableCursorWarping( bool aEnable )
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{
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m_warpCursor = aEnable;
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}
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/**
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* Function IsCursorWarpingEnabled()
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* Returns the current setting for cursor warping.
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*/
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bool IsCursorWarpingEnabled() const
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{
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return m_warpCursor;
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}
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/**
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* Function CenterOnCursor()
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* Sets the viewport center to the current cursor position and warps the cursor to the
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* screen center.
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*/
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virtual void CenterOnCursor() const = 0;
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/**
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* Function Reset()
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* Restores the default VIEW_CONTROLS settings.
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*/
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virtual void Reset();
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protected:
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/// Pointer to controlled VIEW.
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VIEW* m_view;
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/// Current cursor position
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VECTOR2D m_cursorPosition;
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/// Forced cursor position
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VECTOR2D m_forcedPosition;
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/// Is the forced cursor position enabled
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bool m_forceCursorPosition;
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/// Should the cursor be locked within the parent window area
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bool m_cursorCaptured;
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/// Should the cursor snap to grid or move freely
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bool m_snappingEnabled;
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/// Flag for grabbing the mouse cursor
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bool m_grabMouse;
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/// Flag for turning on autopanning
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bool m_autoPanEnabled;
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/// Distance from cursor to VIEW edge when panning is active
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float m_autoPanMargin;
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/// How fast is panning when in auto mode
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float m_autoPanSpeed;
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/// If the cursor is allowed to be warped
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bool m_warpCursor;
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};
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} // namespace KIGFX
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#endif
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