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tdeaccessibility/kmag/kmagzoomview.h

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/***************************************************************************
kmagview.h - description
-------------------
begin : Mon Feb 12 23:45:41 EST 2001
copyright : (C) 2001-2003 by Sarang Lakare
email : sarang#users.sf.net
copyright : (C) 2003-2005 by Olaf Schmidt
email : ojschmidt@kde.org
***************************************************************************/
/***************************************************************************
* *
* 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; version 2 of the License *
* *
***************************************************************************/
#ifndef KMagZoomView_h_
#define KMagZoomView_h_
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
// include files for TQt
#include <tqwidget.h>
#include <tqpainter.h>
#include <tqpixmap.h>
#include <tqtimer.h>
#include <tqscrollview.h>
#include <tqstringlist.h>
#include <tqrect.h>
#include <tqcursor.h>
//class KMagSelRect;
#include "kmagselrect.h"
/**
* The KMagZoomView class provides the view widget for the KmagApp instance.
*
* @author Olaf Schmikt <ojschmidt@kde.org>
* @author Sarang Lakare <sarang#users.sourceforge.net>
*/
class KMagZoomView : public TQScrollView
{
Q_OBJECT
public:
/// Constructor for the main view
KMagZoomView(TQWidget *parent = 0, const char *name=0);
/// Destructor for the main view
~KMagZoomView();
/// Toggles the refreshing of the window
void toggleRefresh();
/// Returns the currently displayed zoomed view
TQPixmap getPixmap();
/// Returns the state of the refresh switch
bool getRefreshStatus() const { return m_refreshSwitch; };
/// Returns teh status of followMouse
bool getFollowMouse() const { return m_followMouse; };
/// Get the status of "show rect. always"
bool getShowSelRect() const { return (m_selRect.getAlwaysVisible()); };
/// Get the coordinates of the selection rectangle
TQRect getSelRectPos() const { return (TQRect&)(m_selRect); };
/// Returns the current state of show mouse
unsigned int getShowMouseType() const;
/// Returns the different ways of showing mouse cursor
TQStringList getShowMouseStringList() const;
/// Returns the status of "fit to window" option
bool getFitToWindow() const { return (m_fitToWindow); };
public slots:
/// Sets zoom to the given value
void setZoom(float zoom = 0.0);
/// Sets the rotation to the given value
void setRotation(int rotation = 0);
/// Sets whether the magnified image is shown inverted
void setInvertation(bool invert);
/// Grabs a frame from the given portion of the display
void grabFrame();
/// Update the mouse cursor in the zoom view
void updateMouseView();
/// Set grab-window-follows-mouse mode
void followMouse(bool follow = true);
/// Shows/Hides the selection marker
void showSelRect(bool show=true);
/// Set the position of the selection region to the given pos
void setSelRectPos(const TQRect & rect);
/// Set the refresh rate in fps (frames per second)
void setRefreshRate(float fps);
/// Shows/Hides mouse cursor in the zoomed view
bool showMouse(unsigned int type);
/// Set the status of "fit to window" option
void setFitToWindow (bool fit=true);
/// Fits the zoom view to the zoom view window
void fitToWindow();
signals:
void contextMenu(TQPoint pos);
protected:
/// Called when the widget is hidden
void hideEvent( TQHideEvent * e);
/// Called when the widget is shown
void showEvent( TQShowEvent * e);
/// Called when the widget has been resized
void resizeEvent(TQResizeEvent *e);
/// Called when the widget is to be repainted
void drawContents ( TQPainter * p, int clipx, int clipy, int clipw, int cliph );
/// This function calculates the mouse position relative to the image
TQPoint calcMousePos(bool updateMousePos=true);
/// This function draws the mouse cursor
void paintMouseCursor(TQPaintDevice *dev, TQPoint mousePos);
/// Called when mouse click is detected
void mousePressEvent (TQMouseEvent *e);
/// Called when mouse is moved
void mouseMoveEvent(TQMouseEvent *e);
/// Mouse button release event handler
void mouseReleaseEvent(TQMouseEvent *e);
/// Mouse button release event handler
void keyPressEvent(TQKeyEvent *e);
/// Mouse button release event handler
void keyReleaseEvent(TQKeyEvent *e);
/// Catch context menu events
void contextMenuEvent (TQContextMenuEvent *e);
/// Mouse button release event handler
void focusOutEvent(TQFocusEvent *e);
/// Returns the rectangle where the pixmap will be drawn
TQRect pixmapRect();
private:
/// Stores the pixmap grabbed from the screen - to be zoomed
TQPixmap m_grabbedPixmap;
/// The selected rectangle which is to be grabbed
KMagSelRect m_selRect;
/// Grabs a window when the timer goes off
TQTimer m_grabTimer;
/// Updates the mouse view
TQTimer m_mouseViewTimer;
/// Zoom matrix
TQWMatrix m_zoomMatrix;
/// Inverted zoom matrix
TQWMatrix m_invertedMatrix;
/// Saves the mouse position when a button is clicked and b4 the cursor is moved to new position
TQPoint m_oldMousePos;
/// Saves the center of the grab window
TQPoint m_oldCenter;
/// Possible modes for the mouse to be in
enum KMagMouseMode {
Normal,
StartSelect,
ResizeSelection,
MoveSelection,
GrabSelection
};
/// The current mode which the mouse is
KMagMouseMode m_mouseMode;
/// stores the state of the Ctrl key
bool m_ctrlKeyPressed;
/// stores the state of the Shift key
bool m_shiftKeyPressed;
/// Store the more recent updated cursor position
TQPoint m_latestCursorPos;
/// Various ways of showing mouse cursor
TQStringList m_showMouseTypes;
// configuration options:
/// To follow mouse motion or not when no key is pressed
bool m_followMouse;
/// State of refreshing - on or off
bool m_refreshSwitch;
/// Stores the state of the refresh switch on hide event
bool m_refreshSwitchStateOnHide;
/// Show mouse cursor type - 0 : do not show, non zero: show
unsigned int m_showMouse;
/// Frames per second for refresh
unsigned int m_fps;
/// Stores the amount to zoom the pixmap
float m_zoom;
/// Stores the degrees to rotate the pixmap
int m_rotation;
/// Whether the magnified image is to be shown inverted
int m_invert;
/// Fit the zoom view to the zoom window
bool m_fitToWindow;
/// Update the magnification matrix
void updateMatrix();
};
#endif // KMagZoomView_h_