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tdeedu/kgeography/src/mapwidget.cpp

333 lines
7.1 KiB

/***************************************************************************
* Copyright (C) 2004-2005 by Albert Astals Cid *
* tsdgeos@terra.es *
* *
* 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. *
***************************************************************************/
#include <math.h> // for rint
#include <stdlib.h>
#include <tdeapplication.h>
#include <tdelocale.h>
#include <tqcursor.h>
#include <tqpainter.h>
#include "mapwidget.h"
mapWidget::mapWidget(TQWidget *parent) : TQWidget(parent)
{
p_wantZoom = false;
p_zooming = false;
p_wantMove = false;
p_moving = false;
p_zoomW = 0;
p_zoomH = 0;
p_scrollBarWidth = 0;
p_scrollBarHeight = 0;
p_scrollBarsVisible = 0;
}
void mapWidget::init(const TQString &path, int scrollBarWidth, int scrollBarHeight)
{
p_scrollBarWidth = scrollBarWidth;
p_scrollBarHeight = scrollBarHeight;
p_originalImage.load(path);
emit updateMaximumSize(p_originalImage.width(), p_originalImage.height());
setOriginalImage();
}
void mapWidget::setMapMove(bool b)
{
p_wantMove = b;
if (b)
{
emit setZoomActionChecked(false);
p_wantZoom = false;
}
}
void mapWidget::setMapZoom(bool b)
{
p_wantZoom = b;
if (b)
{
emit setMoveActionChecked(false);
p_wantMove = false;
}
}
TQSize mapWidget::sizeHint() const
{
return maximumSize();
}
void mapWidget::updateHPosition(int value)
{
p_zoomX = value;
updateShownImage();
}
void mapWidget::updateVPosition(int value)
{
p_zoomY = value;
updateShownImage();
}
void mapWidget::mousePressEvent(TQMouseEvent *e)
{
if (e -> button() == Qt::LeftButton)
{
if (p_wantZoom)
{
p_initial = e -> pos();
p_prev = e -> pos();
p_zooming = true;
}
else if (p_wantMove)
{
p_initial = e -> pos();
setCursor(TQt::SizeAllCursor);
p_moving = true;
}
else
{
TQRgb rgb;
TQImage *currentImage;
currentImage = getCurrentImage();
rgb = currentImage -> pixel(e -> x(), e -> y());
emit clicked(rgb, e -> pos());
}
}
else
{
if (p_wantZoom)
{
setOriginalImage();
}
else e->ignore(); // that makes the event go to mapasker and clear the popup
}
}
void mapWidget::mouseMoveEvent(TQMouseEvent *e)
{
if (p_zooming)
{
TQPainter p(this);
p.setRasterOp(TQt::XorROP);
p.setPen(TQPen(TQt::white, 1, TQt::DotLine));
// remove previous rectangle
p.drawRect(TQRect(p_initial, p_prev));
// put new rectangle
p.drawRect(TQRect(p_initial, e -> pos()));
p_prev = e -> pos();
}
else if (p_moving)
{
int oW, oH;
int auxX, auxY;
bool updatePos = false;
// some shortcuts :-D
oW = p_originalImage.width();
oH = p_originalImage.height();
// where next x and y will be
auxX = (int) ((p_initial.x() - e -> pos().x()) * p_lastFactorX);
if (abs(auxX) > 0)
{
p_zoomX += auxX;
updatePos = true;
}
auxY = (int) ((p_initial.y() - e -> pos().y()) * p_lastFactorY);
if (abs(auxY) > 0)
{
p_zoomY += auxY;
updatePos = true;
}
// make sure we don't go out of bounds
if (p_zoomX < 0) p_zoomX = 0;
if (p_zoomY < 0) p_zoomY = 0;
if (p_zoomX > oW - width() * p_lastFactorX) p_zoomX = (int)rint(oW - width() * p_lastFactorX);
if (p_zoomY > oH - height() * p_lastFactorY) p_zoomY = (int)rint(oH - height() * p_lastFactorY);
if (updatePos) p_initial = e -> pos();
updateShownImage();
emit updatePosition(p_zoomX, p_zoomY);
}
}
void mapWidget::mouseReleaseEvent(TQMouseEvent *e)
{
if (p_zooming)
{
TQPainter p(this);
TQRect r(p_initial, e -> pos());
p.setRasterOp(TQt::XorROP);
p.setPen(TQPen(TQt::white, 1, TQt::DotLine));
// remove previous rectangle
p.drawRect(r);
r = r.normalize();
p_zoomX += (int)rint(r.left() * p_lastFactorX);
p_zoomY += (int)rint(r.top() * p_lastFactorY);
p_zoomW = (int)rint(r.width() * p_lastFactorX);
p_zoomH = (int)rint(r.height() * p_lastFactorY);
if (r.right() > width()) p_zoomW = width() - p_zoomX;
if (r.height() > height()) p_zoomH = height() - p_zoomY;
if (p_zoomX < 0)
{
p_zoomX = 0;
p_zoomW = (int)rint(r.right() * p_lastFactorX);
}
if (p_zoomY < 0)
{
p_zoomY = 0;
p_zoomH = (int)rint(r.bottom() * p_lastFactorY);
}
p_zooming = false;
if (p_zoomW > 1 && p_zoomH > 1)
{
double factorX, factorY;
int maxX, maxY;
updateShownImage();
factorX = (double)p_zoomW / width();
factorY = (double)p_zoomH / height();
maxX = (int)rint(p_originalImage.width() / factorX);
maxY = (int)rint(p_originalImage.height() / factorY);
setMaximumSize(maxX, maxY);
emit updateVisibleSize(p_zoomW, p_zoomH);
emit updatePosition(p_zoomX, p_zoomY);
p_lastFactorX = factorX;
p_lastFactorY = factorY;
emitMoveActionEnabled();
}
}
else if (p_moving)
{
unsetCursor();
p_moving = false;
}
}
void mapWidget::resizeEvent(TQResizeEvent *e)
{
if (p_originalImage.isNull()) return;
p_zoomW = (int)rint(e -> size().width() * p_lastFactorX);
p_zoomH = (int)rint(e -> size().height() * p_lastFactorY);
emit updateVisibleSize(p_zoomW, p_zoomH);
updateShownImage();
emitMoveActionEnabled();
}
void mapWidget::emitMoveActionEnabled()
{
int w, h;
w = p_zoomW;
h = p_zoomH;
if (p_scrollBarsVisible)
{
w += p_scrollBarWidth;
h += p_scrollBarHeight;
}
if (w < maximumWidth() * p_lastFactorX || h < maximumHeight() * p_lastFactorY)
{
p_scrollBarsVisible = true;
emit setMoveActionEnabled(true);
}
else
{
p_scrollBarsVisible = false;
emit setMoveActionChecked(false);
emit setMoveActionEnabled(false);
}
}
TQImage *mapWidget::getCurrentImage()
{
if (p_zoomedImageShown.isNull()) return &p_originalImage;
else return &p_zoomedImageShown;
}
void mapWidget::setOriginalImage()
{
setPaletteBackgroundPixmap(TQPixmap(p_originalImage));
erase();
p_zoomedImageShown = TQImage();
p_lastFactorX = 1;
p_lastFactorY = 1;
p_zoomX = 0;
p_zoomY = 0;
if (p_zoomH != 0 && p_zoomW != 0)
{
/* setting the original image not when opening the app */
p_zoomW = width();
p_zoomH = height();
}
p_oldZoomX = p_zoomX;
p_oldZoomY = p_zoomY;
p_oldZoomW = p_zoomW;
p_oldZoomH = p_zoomH;
p_oldSize = size();
emit updatePosition(0, 0);
emit updateVisibleSize(p_zoomW, p_zoomH);
setMaximumSize(p_originalImage.size());
emitMoveActionEnabled();
}
void mapWidget::updateShownImage()
{
if (p_originalImage.isNull()) return;
if (p_oldZoomX != p_zoomX || p_oldZoomY != p_zoomY || p_oldZoomW != p_zoomW || p_oldZoomH != p_zoomH || size() != p_oldSize)
{
p_zoomedImageShown = p_originalImage.copy(p_zoomX, p_zoomY, p_zoomW, p_zoomH);
p_zoomedImageShown = p_zoomedImageShown.scale(size());
setPaletteBackgroundPixmap(TQPixmap(p_zoomedImageShown));
erase();
p_oldZoomX = p_zoomX;
p_oldZoomY = p_zoomY;
p_oldZoomW = p_zoomW;
p_oldZoomH = p_zoomH;
p_oldSize = size();
}
}
TQSize mapWidget::mapSize() const
{
return p_originalImage.size();
}
#include "mapwidget.moc"