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tdeaccessibility/kmag/kmagzoomview.cpp

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/***************************************************************************
kmagview.cpp - description
-------------------
begin : Mon Feb 12 23:45:41 EST 2001
copyright : (C) 2001-2003 by Sarang Lakare
email : sarang#users.sourceforge.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; either version 2 of the License, or *
* (at your option) any later version. *
* *
***************************************************************************/
// application specific includes
#include "kmagzoomview.h"
#include "kmagzoomview.moc"
// include files for TQt
#include <tqbitmap.h>
#include <tqpixmap.h>
#include <tqimage.h>
#include <tqcursor.h>
#include <tqglobal.h>
#include <tqpainter.h>
#include <tqwhatsthis.h>
#include <tqwidget.h>
// include files for KDE
#include <kapplication.h>
#include <kcursor.h>
#include <kdebug.h>
#include <klocale.h>
#include <X11/Xlib.h>
#include <X11/Xatom.h>
// include bitmaps for cursors
static uchar left_ptr_bits[] = {
0x00, 0x00, 0x08, 0x00, 0x18, 0x00, 0x38, 0x00, 0x78, 0x00, 0xf8, 0x00,
0xf8, 0x01, 0xf8, 0x03, 0xf8, 0x07, 0xf8, 0x00, 0xd8, 0x00, 0x88, 0x01,
0x80, 0x01, 0x00, 0x03, 0x00, 0x03, 0x00, 0x00};
static uchar left_ptrmsk_bits[] = {
0x0c, 0x00, 0x1c, 0x00, 0x3c, 0x00, 0x7c, 0x00, 0xfc, 0x00, 0xfc, 0x01,
0xfc, 0x03, 0xfc, 0x07, 0xfc, 0x0f, 0xfc, 0x0f, 0xfc, 0x01, 0xdc, 0x03,
0xcc, 0x03, 0x80, 0x07, 0x80, 0x07, 0x00, 0x03};
static uchar phand_bits[] = {
0x00, 0x00, 0x00, 0x00, 0xfe, 0x01, 0x00, 0x00, 0x01, 0x02, 0x00, 0x00,
0x7e, 0x04, 0x00, 0x00, 0x08, 0x08, 0x00, 0x00, 0x70, 0x08, 0x00, 0x00,
0x08, 0x08, 0x00, 0x00, 0x70, 0x14, 0x00, 0x00, 0x08, 0x22, 0x00, 0x00,
0x30, 0x41, 0x00, 0x00, 0xc0, 0x20, 0x00, 0x00, 0x40, 0x12, 0x00, 0x00,
0x80, 0x08, 0x00, 0x00, 0x00, 0x05, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
static uchar phandm_bits[] = {
0xfe, 0x01, 0x00, 0x00, 0xff, 0x03, 0x00, 0x00, 0xff, 0x07, 0x00, 0x00,
0xff, 0x0f, 0x00, 0x00, 0xfe, 0x1f, 0x00, 0x00, 0xf8, 0x1f, 0x00, 0x00,
0xfc, 0x1f, 0x00, 0x00, 0xf8, 0x3f, 0x00, 0x00, 0xfc, 0x7f, 0x00, 0x00,
0xf8, 0xff, 0x00, 0x00, 0xf0, 0x7f, 0x00, 0x00, 0xe0, 0x3f, 0x00, 0x00,
0xc0, 0x1f, 0x00, 0x00, 0x80, 0x0f, 0x00, 0x00, 0x00, 0x07, 0x00, 0x00,
0x00, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
static bool obscuredRegion (TQRegion &region, Window winId, Window ignoreId, Window start = 0, int level = -1) {
Window root, tqparent, *tqchildren; uint ntqchildren;
if (0 == start)
start = qt_xrootwin();
bool winIdFound = false;
if (0 != XQueryTree (qt_xdisplay(), start, &root, &tqparent, &tqchildren, &ntqchildren)) {
for (uint i=0; i < ntqchildren; ++i) {
if (winIdFound) {
if (ignoreId != tqchildren [i]) {
XWindowAttributes atts;
XGetWindowAttributes (qt_xdisplay(), tqchildren [i], &atts);
if (atts.map_state == IsViewable)
region -= TQRegion (atts.x, atts.y, atts.width, atts.height, TQRegion::Rectangle);
}
}
else if (winId == tqchildren [i])
winIdFound = true;
// According to tests, my own window ID is either on toplevel or two levels below.
// To avoid unneccessary recursion, we limit the search to two recursion levels,
// then to five recursion levels, and make a full recursive search only if that
// was unsuccessful.
else if (level > 1)
winIdFound = obscuredRegion (region, winId, ignoreId, tqchildren [i], level-1);
else if (level == -1)
if (! (winIdFound = obscuredRegion (region, winId, ignoreId, tqchildren [i], 0)))
if (! (winIdFound = obscuredRegion (region, winId, ignoreId, tqchildren [i], 1)))
winIdFound = obscuredRegion (region, winId, ignoreId, tqchildren [i], -1);
}
if (tqchildren != NULL)
XFree (tqchildren);
}
return winIdFound;
}
KMagZoomView::KMagZoomView(TQWidget *tqparent, const char *name)
: TQScrollView(tqparent, name),
m_selRect(0, 0, 128, 128, this),
m_grabTimer(0),
m_mouseViewTimer(0),
m_latestCursorPos(0,0),
m_followMouse(false),
m_showMouse(1),
m_zoom(1.0),
m_rotation(0),
m_invert(false),
m_fitToWindow(true)
{
KApplication::setGlobalMouseTracking(TRUE);
viewport()->setMouseTracking(TRUE);
viewport()->setBackgroundMode (NoBackground);
viewport()->setFocusPolicy(TQ_StrongFocus);
m_ctrlKeyPressed = false;
m_shiftKeyPressed = false;
m_refreshSwitch = true;
m_refreshSwitchStateOnHide = m_refreshSwitch;
// set the refresh rate
setRefreshRate(10);
// connect it to grabFrame()
connect(&m_grabTimer, TQT_SIGNAL(timeout()), TQT_SLOT(grabFrame()));
// start the grabTimer
m_grabTimer.start(static_cast<int>(1000.0/m_fps));
// connect it to updateMouseView()
connect(&m_mouseViewTimer, TQT_SIGNAL(timeout()), TQT_SLOT(updateMouseView()));
// start the grabTimer @ 25 frames per second!
m_mouseViewTimer.start(25);
TQWhatsThis::add(this, i18n("This is the main window which shows the contents of the\
selected region. The contents will be magnified according to the zoom level that is set."));
// different ways to show the cursor.
m_showMouseTypes << "Hidden" << "Box" << "Arrow" << "Actual";
updateMatrix();
}
KMagZoomView::~KMagZoomView()
{
KApplication::setGlobalMouseTracking(FALSE);
}
/**
* This function will set/reset mouse following of grab window.
*/
void KMagZoomView::followMouse(bool follow)
{
if(follow) {
m_followMouse = true;
m_mouseMode = Normal;
setVScrollBarMode (TQScrollView::AlwaysOff);
setHScrollBarMode (TQScrollView::AlwaysOff);
} else {
m_followMouse = false;
m_mouseMode = Normal;
setVScrollBarMode (TQScrollView::AlwaysOn);
setHScrollBarMode (TQScrollView::AlwaysOn);
}
}
/**
* Called when the widget is hidden. Stop refresh when this happens.
*/
void KMagZoomView::hideEvent( TQHideEvent* )
{
// Save the state of the refresh switch.. the state will be restored
// when showEvent is called
m_refreshSwitchStateOnHide = m_refreshSwitch;
// Check if refresh is ON
if(m_refreshSwitch) {
toggleRefresh();
}
}
/**
* Called when the widget is shown. Start refresh when this happens.
*/
void KMagZoomView::showEvent( TQShowEvent* )
{
// Check if refresh switch was ON when hide was called and if currently it is OFF
if(m_refreshSwitchStateOnHide && !m_refreshSwitch) {
// start the refresh in that case
toggleRefresh();
}
}
/**
* Called when the widget is resized. Check if fitToWindow is active when this happens.
*/
void KMagZoomView::resizeEvent( TQResizeEvent * e )
{
TQScrollView::resizeEvent (e);
if(m_fitToWindow)
fitToWindow();
}
/**
* Called when the widget is to be tqrepainted
*
* @param p
*/
void KMagZoomView::drawContents ( TQPainter * p, int clipx, int clipy, int clipw, int cliph )
{
if(m_grabbedPixmap.isNull())
return;
// A pixmap which will be eventually displayed
TQRect areaToPaint = m_invertedMatrix.mapRect (TQRect(clipx, clipy, clipw, cliph));
TQPixmap clippedPixmap (areaToPaint.size());
clippedPixmap.fill (TQColor (128, 128, 128));
areaToPaint &= TQRect (TQPoint (0,0), m_selRect.size());
bitBlt(&clippedPixmap, TQPoint (0,0), &m_grabbedPixmap, areaToPaint);
// show the pixel under mouse cursor
if(m_showMouse) {
// paint the mouse cursor
paintMouseCursor(TQT_TQPAINTDEVICE(&clippedPixmap), calcMousePos (m_refreshSwitch)-TQPoint (areaToPaint.x(), areaToPaint.y()));
}
TQPixmap zoomedPixmap;
zoomedPixmap = clippedPixmap.xForm (m_zoomMatrix);
if (m_invert) {
TQImage zoomedImage;
zoomedImage = zoomedPixmap.convertToImage();
zoomedImage.tqinvertPixels (false);
p->drawImage (TQPoint (clipx-contentsX(), clipy-contentsY()), zoomedImage, zoomedImage.rect(),
TQt::ThresholdDither | TQt::ThresholdAlphaDither | TQt::AvoidDither);
} else {
p->drawPixmap (TQPoint (clipx, clipy), zoomedPixmap, zoomedPixmap.rect());
}
}
/**
* Draws the mouse cursor according to the current selection of the type of
* mouse cursor to draw.
*/
void KMagZoomView::paintMouseCursor(TQPaintDevice *dev, TQPoint mousePos)
{
if(!dev)
return;
TQPainter pz(dev);
if(m_latestCursorPos.x() >= 0 && m_latestCursorPos.x() < m_selRect.width() &&
m_latestCursorPos.y() >= 0 && m_latestCursorPos.y() < m_selRect.height() ) {
// mouse position is indeed inside the selRect
// How to show the mouse :
switch(m_showMouse) {
case 1:
// 1. Square around the pixel
pz.setPen(TQt::white);
pz.setRasterOp(TQt::XorROP);
pz.drawRect(mousePos.x()-1, mousePos.y()-1, 3, 3);
break;
case 2:
{
// 2. Arrow cursor
pz.setPen(TQt::black);
pz.setBackgroundColor(TQt::white);
TQBitmap sCursor( 16, 16, left_ptr_bits, TRUE );
TQBitmap tqmask( 16, 16, left_ptrmsk_bits, TRUE );
sCursor.setMask(tqmask);
// since hot spot is at 3,1
pz.drawPixmap(mousePos.x()-3, mousePos.y()-1, sCursor);
}
break;
case 3:
{
// 3. Actual cursor
// Get the current cursor type
TQWidget *dummy = KApplication::widgetAt(TQCursor::pos(), FALSE);
if(!dummy)
break;
kdDebug() << ">" << dummy->name() << ":" << dummy->cursor().shape() << "-" << endl;
switch(this->cursor().shape()) {
case ArrowCursor :
{
// 2. Arrow cursor
pz.setPen(TQt::black);
pz.setBackgroundColor(TQt::white);
TQBitmap sCursor( 16, 16, left_ptr_bits, TRUE );
TQBitmap tqmask( 16, 16, left_ptrmsk_bits, TRUE );
sCursor.setMask(tqmask);
// since hot spot is at 3,1
pz.drawPixmap(mousePos.x()-3, mousePos.y()-1, sCursor);
}
break;
default:
TQBitmap sCursor( 32, 32, phand_bits, TRUE );
TQBitmap tqmask( 32, 32, phandm_bits, TRUE );
sCursor.setMask(tqmask);
pz.drawPixmap(mousePos.x(), mousePos.y(), sCursor);
break;
} // switch(cursor)
}
break;
default:
// do not show anything
break;
} // switch(m_showMouse)
}
}
TQPoint KMagZoomView::calcMousePos(bool updateMousePos)
{
// get position of mouse wrt selRect
if(updateMousePos) { // get a new position only if asked
m_latestCursorPos = TQCursor::pos();
m_latestCursorPos -= TQPoint(m_selRect.x(), m_selRect.y());
}
// get coordinates of the pixel w.r.t. the pixmap
return TQPoint (m_latestCursorPos.x(), m_latestCursorPos.y());
}
// MOUSE ACTIONS
/**
* Called when mouse is clicked inside the window
*
* @param e
*/
void KMagZoomView::mousePressEvent(TQMouseEvent *e)
{
switch(e->button()) {
case Qt::LeftButton :
if(m_ctrlKeyPressed) {
// check if currently in resize mode
// don't do anything if fitToWindow is enabled
if ((m_mouseMode != ResizeSelection) && !m_fitToWindow) {
// set the mode to ResizeSelection
m_mouseMode = ResizeSelection;
// set mouse cursor to "resize all direction"
setCursor(sizeAllCursor);
// backup the old position
m_oldMousePos.setX(e->globalX());
m_oldMousePos.setY(e->globalY());
// set the cursor position to the bottom-right of the selected region
TQCursor::setPos(m_selRect.bottomRight());
// show the selection rectangle
m_selRect.show();
}
else {
// ignore this button press.. so it goes to the tqparent
e->ignore();
}
} else if(m_shiftKeyPressed) {
// check if currently in move mode
// don't do anything if follow mouse is enabled
if ((m_mouseMode != MoveSelection) && !m_followMouse) {
m_mouseMode = MoveSelection;
// set mouse cursor to cross hair
setCursor(crossCursor);
// backup the old position
m_oldMousePos.setX(e->globalX());
m_oldMousePos.setY(e->globalY());
// set the cursor position to the center of the selected region
TQCursor::setPos(m_selRect.center());
// show the selected rectangle
m_selRect.show();
}
else {
// ignore this button press.. so it goes to the tqparent
e->ignore();
}
} else {
// check if currently in move mode
// don't do anything if follow mouse is enabled
if ((m_mouseMode != GrabSelection) && !m_followMouse) {
m_mouseMode = GrabSelection;
// set mouse cursor to hand
setCursor(KCursor::handCursor());
// store the old position
m_oldMousePos.setX(e->globalX());
m_oldMousePos.setY(e->globalY());
m_oldCenter = m_selRect.center();
// show the selected rectangle
m_selRect.show();
}
else {
// ignore this button press.. so it goes to the tqparent
e->ignore();
}
}
break;
case Qt::MidButton :
// check if currently in move mode
// don't do anything if follow mouse is enabled
if ((m_mouseMode != MoveSelection) && !m_followMouse) {
m_mouseMode = MoveSelection;
// set mouse cursor to cross hair
setCursor(crossCursor);
// backup the old position
m_oldMousePos.setX(e->globalX());
m_oldMousePos.setY(e->globalY());
// set the cursor position to the center of the selected region
TQCursor::setPos(m_selRect.center());
// show the selected rectangle
m_selRect.show();
}
else {
// ignore this button press.. so it goes to the tqparent
e->ignore();
}
break;
// do nothing
default:
// ignore this button press.. so it goes to the tqparent
e->ignore();
break;
}
}
/**
* Called when a mouse button is released
*
* @param e
*/
void KMagZoomView::mouseReleaseEvent(TQMouseEvent *e)
{
switch(e->button()) {
case Qt::LeftButton :
case Qt::MidButton :
// check if currently in move mode
if(m_mouseMode == MoveSelection) {
// hide the selection window
m_selRect.hide();
// set the mouse mode to normal
m_mouseMode = Normal;
// restore the cursor tqshape
setCursor(arrowCursor);
// restore the cursor position
TQCursor::setPos(m_oldMousePos);
} else if(m_mouseMode == ResizeSelection) {
// hide the selection window
m_selRect.hide();
// set the mouse mode to normal
m_mouseMode = Normal;
// restore the cursor tqshape
setCursor(arrowCursor);
// restore the cursor position
TQCursor::setPos(m_oldMousePos);
} else if(m_mouseMode == GrabSelection) {
// hide the selection window
m_selRect.hide();
// set the mouse mode to normal
m_mouseMode = Normal;
// restore the cursor tqshape
setCursor(arrowCursor);
}
break;
case Qt::RightButton :
break;
case Qt::NoButton :
break;
// do nothing
default:
;
}
}
/**
* Called when mouse is moved inside the window
*
* @param e
*/
void KMagZoomView::mouseMoveEvent(TQMouseEvent *e)
{
if(m_mouseMode == ResizeSelection) {
// In resize selection mode
// set the current mouse position as the bottom, right corner
m_selRect.setRight(e->globalX());
m_selRect.setBottom(e->globalY());
m_selRect.update();
grabFrame();
} else if(m_mouseMode == MoveSelection) {
TQPoint newCenter;
// set new center to be the current mouse position
m_selRect.moveCenter(e->globalPos());
m_selRect.update();
grabFrame();
} else if(m_mouseMode == GrabSelection) {
TQPoint newPos;
// get new position
newPos = e->globalPos();
TQPoint delta = (newPos - m_oldMousePos)/m_zoom;
m_selRect.moveCenter(m_oldCenter-delta);
m_selRect.update();
grabFrame();
}
}
void KMagZoomView::keyPressEvent(TQKeyEvent *e)
{
int offset = 16;
if (e->state() & TQt::ShiftButton)
offset = 1;
if (e->key() == TQt::Key_Control)
m_ctrlKeyPressed = true;
else if (e->key() == TQt::Key_Shift)
m_shiftKeyPressed = true;
else if (e->key() == TQt::Key_Left)
{
if (e->state() & TQt::ControlButton)
{
if (offset >= m_selRect.width())
m_selRect.setWidth (1);
else
m_selRect.setWidth (m_selRect.width()-offset);
}
else if (contentsX() > 0)
{
offset = (int)(offset*m_zoom);
if (contentsX() > offset)
setContentsPos (contentsX()-offset, contentsY());
else
setContentsPos (0, contentsY());
}
else if (m_followMouse == false)
{
if (offset > m_selRect.x())
m_selRect.setX (0);
else
m_selRect.moveBy (-offset,0);
}
m_selRect.update();
}
else if (e->key() == TQt::Key_Right)
{
if (e->state() & TQt::ControlButton)
m_selRect.setRight (m_selRect.right()+offset);
else if (contentsX() < contentsWidth()-visibleWidth())
{
offset = (int)(offset*m_zoom);
if (contentsX()+offset < contentsWidth()-visibleWidth())
setContentsPos (contentsX()+offset, contentsY());
else
setContentsPos (contentsWidth()-visibleWidth(), contentsY());
}
else if (m_followMouse == false)
m_selRect.moveBy (offset,0);
m_selRect.update();
}
else if (e->key() == TQt::Key_Up)
{
if (e->state() & TQt::ControlButton)
{
if (offset >= m_selRect.height())
m_selRect.setHeight (1);
else
m_selRect.setHeight (m_selRect.height()-offset);
}
else if (contentsY() > 0)
{
offset = (int)(offset*m_zoom);
if (contentsY() > offset)
setContentsPos (contentsX(), contentsY()-offset);
else
setContentsPos (contentsX(), 0);
}
else if (m_followMouse == false)
{
if (offset > m_selRect.y())
m_selRect.setY (0);
else
m_selRect.moveBy (0, -offset);
}
m_selRect.update();
}
else if (e->key() == TQt::Key_Down)
{
if (e->state() & TQt::ControlButton)
m_selRect.setBottom (m_selRect.bottom()+offset);
else if (contentsY() < contentsHeight()-visibleHeight())
{
offset = (int)(offset*m_zoom);
if (contentsY()+offset < contentsHeight()-visibleHeight())
setContentsPos (contentsX(), contentsY()+offset);
else
setContentsPos (contentsX(), contentsHeight()-visibleHeight());
}
else if (m_followMouse == false)
m_selRect.moveBy (0, offset);
m_selRect.update();
}
else
e->ignore();
}
void KMagZoomView::keyReleaseEvent(TQKeyEvent *e)
{
if (e->key() == TQt::Key_Control)
m_ctrlKeyPressed = false;
else if (e->key() == TQt::Key_Shift)
m_shiftKeyPressed = false;
else
e->ignore();
}
void KMagZoomView::contextMenuEvent (TQContextMenuEvent *e)
{
emit contextMenu(e->globalPos());
e->accept();
}
void KMagZoomView::focusOutEvent(TQFocusEvent *e)
{
if(e->lostFocus() == TRUE) {
m_ctrlKeyPressed = false;
m_shiftKeyPressed = false;
}
}
// SLOTS
/**
* This will fit the zoom view to the view window, thus using the maximum
* possible space in the window.
*/
void KMagZoomView::fitToWindow()
{
TQPoint currCenter = m_selRect.center();
TQRect newRect = m_invertedMatrix.mapRect (TQRect(0, 0, visibleWidth(), visibleHeight()));
m_selRect.setSize (newRect.size());
m_selRect.moveCenter(currCenter);
m_selRect.update();
viewport()->tqrepaint(false);
}
void KMagZoomView::setFitToWindow(bool fit)
{
m_fitToWindow = fit;
if (fit)
fitToWindow();
}
/**
* Grabs frame from X
*/
void KMagZoomView::grabFrame()
{
// check refresh status
if (!m_refreshSwitch)
return;
// check if follow-mouse is enabled
if(m_followMouse && (m_mouseMode != ResizeSelection)) {
// in this case grab w.r.t the current mouse position
TQPoint newCenter;
// set new center to be the current mouse position
m_selRect.moveCenter(TQCursor::pos());
m_selRect.update();
}
//TQRect r = pixmapRect();
// define a normalized rectangle
TQRect selRect = m_selRect.normalize();
// grab screenshot from the screen and put it in the pixmap
m_grabbedPixmap = TQPixmap::grabWindow(TQApplication::desktop()->winId(), selRect.x(), selRect.y(),
selRect.width(), selRect.height());
// If the KMag window itself is in the screenshot, then it need to be filled with gray to avoid recursion
TQPoint globalPos = viewport()->mapToGlobal (viewport()->rect().topLeft());
TQRegion intersection (globalPos.x(), globalPos.y(), viewport()->width(), viewport()->height(), TQRegion::Rectangle);
intersection &= TQRegion (selRect, TQRegion::Rectangle);
// We don't want to overpaint other windows that happen to be on top
obscuredRegion (intersection, tqtopLevelWidget()->winId(), m_selRect.winId());
intersection.translate (-selRect.x(), -selRect.y());
TQPainter painter (&m_grabbedPixmap, true);
TQMemArray<TQRect> rects (intersection.tqrects());
for (uint i = 0; i < rects.size(); i++)
painter.fillRect (rects[i], TQBrush (TQColor (128, 128, 128)));
// call tqrepaint to display the newly grabbed image
TQRect newSize = m_zoomMatrix.mapRect (m_grabbedPixmap.rect());
resizeContents (newSize.width(), newSize.height());
viewport()->tqrepaint(false);
}
/**
* Updates the mouse cursor in the zoom view
*/
void KMagZoomView::updateMouseView()
{
TQPoint pos(TQCursor::pos());
if(m_selRect.left() <= pos.x() && pos.x() <= m_selRect.right() &&
m_selRect.top() <= pos.y() && pos.y() <= m_selRect.bottom() &&
m_refreshSwitch)
viewport()->tqrepaint(false);
}
/**
* Toggles the state of refreshing.
*/
void KMagZoomView::toggleRefresh()
{
if(m_refreshSwitch) {
m_refreshSwitch = false;
m_grabTimer.stop();
m_mouseViewTimer.stop();
} else {
m_refreshSwitch = true;
m_grabTimer.start(1000/m_fps);
m_mouseViewTimer.start(40);
}
}
/**
* This function sets the zoom value to be used.
*/
void KMagZoomView::setZoom(float zoom)
{
m_zoom = zoom;
updateMatrix();
viewport()->tqrepaint();
}
/**
* This function sets the rotation value to be used.
*/
void KMagZoomView::setRotation(int rotation)
{
m_rotation = rotation;
updateMatrix();
viewport()->tqrepaint();
}
/**
* This function sets whether the magnified image is shown inverted
*/
void KMagZoomView::setInvertation(bool invert)
{
m_invert = invert;
viewport()->tqrepaint();
}
/**
* Set a new refresh rate.
*/
void KMagZoomView::setRefreshRate(float fps)
{
if(fps < 0.1)
return;
m_fps = static_cast<unsigned int>(fps);
if(m_grabTimer.isActive())
m_grabTimer.changeInterval(static_cast<int>(1000.0/m_fps));
}
void KMagZoomView::showSelRect(bool show)
{
m_selRect.alwaysVisible(show);
if(show) {
m_selRect.show();
} else if(m_mouseMode == Normal) {
m_selRect.hide();
}
}
/**
* Sets the selection rectangle to the given position.
*/
void KMagZoomView::setSelRectPos(const TQRect & rect)
{
m_selRect.setRect(rect.x(), rect.y(), rect.width(), rect.height());
m_selRect.update();
grabFrame();
}
bool KMagZoomView::showMouse(unsigned int type)
{
if(type > m_showMouseTypes.count()-1)
return (false);
else
m_showMouse = type;
return(true);
}
unsigned int KMagZoomView::getShowMouseType() const
{
return (m_showMouse);
}
TQStringList KMagZoomView::getShowMouseStringList() const
{
return (m_showMouseTypes);
}
/**
* Returns the image which is being displayed. Its again drawn by adding
* the mouse cursor if needed.
*/
TQPixmap KMagZoomView::getPixmap()
{
// show the pixel under mouse cursor
if(m_showMouse && !m_grabbedPixmap.isNull()) {
// Pixmap which will have the pixmap + mouse
TQPixmap mousePixmap(m_grabbedPixmap);
// paint the mouse cursor w/o updating to a newer position
paintMouseCursor(TQT_TQPAINTDEVICE(&mousePixmap), calcMousePos(false));
return(mousePixmap);
} else { // no mouse cursor
return(m_grabbedPixmap);
}
}
/**
* Update the magnification matrix
*/
void KMagZoomView::updateMatrix()
{
// update selection window size if necessary
if (m_fitToWindow)
fitToWindow();
// recompute the zoom matrix
m_zoomMatrix.reset();
m_zoomMatrix.scale(m_zoom, m_zoom);
m_zoomMatrix.rotate(m_rotation);
bool inverted;
m_invertedMatrix = m_zoomMatrix.invert (&inverted);
}
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