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glwidget.cpp
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#include <QtGui>
#include <QtOpenGL>
#include <QBitmap>
#if defined(Q_WS_MAC)
#include <OpenGL/glu.h>
#else
#ifndef QT_LINUXBASE
# include <GL/glu.h>
#endif
#endif
#include <algorithm>
#include <math.h>
#include <sstream>
#include <vector>
#include <utility> //includes std::pair
#include <stdlib.h>
#include <ctime>
#include "glwidget.h"
#include "NucleotideDisplay.h"
#include "BiasDisplay.h"
#include "RepeatMap.h"
#include "AnnotationDisplay.h"
#include "CylinderDisplay.h"
#include "RepeatOverviewDisplay.h"
#include "OligomerDisplay.h"
#include "HighlightDisplay.h"
#include "GtfReader.h"
#include "FastaReader.h"
#include "SkittleUtil.h"
using std::string;
using std::pair;
/** ***********************************
GLWidget is the primary display interface for Skittle. It handles the OpenGL
rendering and layout of all of the Graph display classes (everything that inherits
AbstractGraph). It is the primary workhorse that instantiates all the file readers
and all the displays. It also handles mouse tracking inside of OpenGL coordinate frame
since it controls the OpenGL viewframe settings (position, zoom, etc). Skittle
uses a largely 2D isometric display surface.
GLWidget keeps track of what Graphs are currently displayed and arranges the position
of the Graphs on the screen accordingly. It handles all of the mouse driven tools from
the toolbar. For example, when the select tool is used and clicked at (302, 57) glwidget
figures out which display is within that x range (>302), adjusts the coordinate for margins
and then passes it to the Graph for processing. The left-right displacement of the
horizontal scrollbar is handled by GLWidget. Finally, key presses are sent to the active
GLWidget for interpretation.
There is one GLWidget per MdiChildWindow. Each on connects to exactly one file. New windows
with unique files can be created through the addViewAction which will create a new glWidget.
GLWidget inherits from QGLWidget which is the Qt interface layer.
Development: GLWidget has always threatened to be the god object of Skittle. It has been
stripped down several times but it is still one of the largest class files. More functionality,
such as mouse and keyboard interaction could be moved to new helper classes.
*/
GLWidget::GLWidget(UiVariables* gui, QWidget* parentWidget)
: QGLWidget(parentWidget)
{
ui = gui;
glWidget = this;
parent = dynamic_cast<MdiChildWindow*>(parentWidget);
setMouseTracking(true);
setMinimumWidth(100);
setMinimumHeight(100);
frame = 0;
setupColorTable();
reader = new FastaReader(this, ui);
trackReader = new GtfReader(ui);
nuc = new NucleotideDisplay(ui, this);
bias = new BiasDisplay(ui, this);
freq = new RepeatMap(ui, this);
freq->link(nuc);
cylinder = new CylinderDisplay(ui, this);
align = new RepeatOverviewDisplay(ui, this);
olig = new OligomerDisplay(ui, this);
highlight = new HighlightDisplay(ui, this);
addGraph(olig);
addGraph(align);
addGraph(freq);
addGraph(bias);
addGraph(highlight);
addGraph(nuc);
addGraph(cylinder);
selectionBoxVisible = false;
border = 10;
xPosition = 0;
mouseMovePosition = QPoint();//you may want to initialize press and release points, start/end
setTool(RESIZE_TOOL);
setMouseTracking(true);
setFocusPolicy(Qt::ClickFocus);
createConnections();
createCursors();
// createButtons();
srand(time(0));
}
GLWidget::~GLWidget()
{
delete reader;
delete trackReader;
for(int i = graphs.size() -1; i >= 0; --i)
{
delete graphs[i];
}
makeCurrent();
}
void GLWidget::addGraph(AbstractGraph* graph)
{
graphs.insert(graphs.begin(), graph );//these are added in reverse order for the sake of AnnotationDisplay
//Note: The connection between displayChanged and updateDisplay is specifically used
//for the case where the settingsUi tab causes an update that is only relevant to
//one of the graphs. This means that one graph is already invalidated and the others
//do not need to change their data.
connect( graph, SIGNAL(displayChanged()), this, SLOT(updateDisplay()) );
connect( graph, SIGNAL(hideSettings(QScrollArea*)), this, SIGNAL(hideSettings(QScrollArea*)));
connect( graph, SIGNAL(showSettings(QScrollArea*)), this, SIGNAL(showSettings(QScrollArea*)));
emit addGraphMode(graph);
}
void GLWidget::createButtons()
{
for(int i = (int)graphs.size()-1; i >= 0 ; --i)
emit addGraphMode( graphs[i] );
emit addDivider();
}
void GLWidget::createConnections()
{
connect(trackReader,SIGNAL(BookmarkAdded(track_entry,string)), this,SLOT(addTrackEntry(track_entry,string)));
/****CONNECT LOCAL VARIABLES*******/
connect(ui, SIGNAL(internalsUpdated()), this, SLOT(changeZoom()));
connect(ui, SIGNAL(colorsChanged(int)), this, SLOT(invalidateDisplayGraphs()));
}
QSize GLWidget::minimumSizeHint() const
{
return QSize(160, 60);
}
QSize GLWidget::sizeHint() const
{
return QSize(450, 300);
}
double GLWidget::pixelsToOpenGlGridRatio()
{
return ui->getZoom() / 100.0 * 3.0;//this make pixel->gl 3x size by default
//these are not 1:1 so that users have an easy time seeing the Skittle pixels
}
int GLWidget::setHorizontalScrollbarRange()
{
int fullPixelWidth = getTotalPixelWidth();
int val = (int)max(0.0, ((double)(fullPixelWidth)/(double)pixelsToOpenGlGridRatio() - openGlGridWidth()) ) ;
qDebug() << "HorizontalBar Width: " << val;
emit totalWidthChanged(val);
return val;
}
//***********SLOTS*******************
const string* GLWidget::seq()
{
return reader->seq();
}
void GLWidget::displayString(const string* sequence)
{
ui->print("New sequence received. Size:", sequence->size());
for(int i = 0; i < (int)graphs.size(); ++i)
{
graphs[i]->setSequence(sequence);
graphs[i]->invalidate();
}
ui->setAllVariables(128, 1, 100, 1, -1);
}
void GLWidget::zoomExtents()
{
zoomRange(1,seq()->size());
}
void GLWidget::zoomRange(int startIndex, int endIndex)
{//TODO:refactor this with pixelToGlCoords
int newZoom = -1;
float pixelWidth = (float)ui->getWidth() / (float)ui->getScale();
float skixelsOnScreen = pixelWidth * (openGlGridHeight()-10);
int selectionSize = abs(endIndex - startIndex);
float requiredScale = (selectionSize) / skixelsOnScreen;
int newScale = max(1, (int)(requiredScale + 0.5) );
if (newScale == 1)
{
float requiredLines = selectionSize / pixelWidth;
float screenHeight = openGlGridHeight() * ((float)ui->getZoom() / 100); //how many pixels at zoom 100
float screenWidth = openGlGridWidth() * ((float)ui->getZoom() / 100) - 50;
float requiredZoom = (screenHeight / requiredLines); // not percent based
if (pixelWidth * (requiredZoom) > screenWidth) // if the zoom level makes the line wider than the screen just zoom to fit the widt
requiredZoom = screenWidth / pixelWidth;
newZoom = max(100,(int)(requiredZoom * 100)); //now it's in percent
}
ui->setAllVariables(-1, newScale, newZoom, min(startIndex,endIndex), -1 );
}
void GLWidget::on_moveButton_clicked()
{
setTool(MOVE_TOOL);
}
void GLWidget::on_selectButton_clicked()
{
setTool(SELECT_TOOL);
}
void GLWidget::on_findButton_clicked()
{
setTool(FIND_TOOL);
highlight->ensureVisible();
}
void GLWidget::on_addAnnotationButton_clicked()
{
ui->print("ANNOTATE selected");
setTool(ANNOTATE_TOOL);
}
void GLWidget::on_screenCaptureButton_clicked()
{
makeCurrent();
QImage image;
int pictureWidth = getTotalPixelWidth();
//Set the gl render width to the total graph's pixel widths
int tempWidth = width();
resize(pictureWidth, height());
paintGL();
if (format().rgba())
{
image = read_framebuffer(QSize(pictureWidth, height()), format().alpha(), false);
}
else
{
#if defined(Q_WS_WIN) && !defined(QT_OPENGL_ES)
image = QImage(pictureWidth, height(), QImage::Format_Indexed8);
glReadPixels(0, 0, pictureWidth, height(), GL_COLOR_INDEX, GL_UNSIGNED_BYTE, image.bits());
const QVector<QColor> pal = QColormap::instance().colormap();
if(pal.size())
{
image.setNumColors(pal.size());
for(int i = 0; i < pal.size(); i++)
{
image.setColor(i, pal.at(i).rgb());
}
}
image = image.mirrored();
#endif
}
stringstream namestream;
namestream << chromosomeName << "_w-" << ui->getWidth() << "_st-" << ui->getStart(glWidget) << "_sc-" << ui->getScale() << ".png";
QString filename = QFileDialog::getSaveFileName(this, tr("Save Image"), namestream.str().c_str(), tr("Images (*.png *.jpg)"));
image.save(filename);
filename.prepend("Saved image: ");
ui->print(filename.toStdString());
//Set width back to what it should be
this->resize(tempWidth, height());
paintGL();
}
int GLWidget::getTotalPixelWidth()
{
int skixelWidth = border;
for(int i = 0; i < (int)graphs.size(); ++i)
{
if(graphs[i]->hidden == false)
skixelWidth += graphs[i]->width() + border;
}
return skixelWidth * pixelsToOpenGlGridRatio();
}
QImage GLWidget::read_framebuffer(const QSize &size, bool alpha_format, bool include_alpha)
{
QImage image(size, alpha_format ? QImage::Format_ARGB32 : QImage::Format_RGB32);
int w = size.width();
int h = size.height();
glReadPixels(0, 0, w, h, GL_RGBA, GL_UNSIGNED_BYTE, image.bits());
convertFromGLImage(image, w, h, alpha_format, include_alpha);
return image;
}
void GLWidget::convertFromGLImage(QImage &image, int w, int h, bool alpha_format, bool include_alpha)
{
if (QSysInfo::ByteOrder == QSysInfo::BigEndian) {
// OpenGL gives RGBA; Qt wants ARGB
uint *p = (uint*)image.bits();
uint *end = p + w*h;
if (alpha_format && include_alpha) {
while (p < end) {
uint a = *p << 24;
*p = (*p >> 8) | a;
p++;
}
} else {
// This is an old legacy fix for PowerPC based Macs, which
// we shouldn't remove
while (p < end) {
*p = 0xff000000 | (*p>>8);
++p;
}
}
} else {
// OpenGL gives ABGR (i.e. RGBA backwards); Qt wants ARGB
for (int y = 0; y < h; y++) {
uint *q = (uint*)image.scanLine(y);
for (int x=0; x < w; ++x) {
const uint pixel = *q;
*q = ((pixel << 16) & 0xff0000) | ((pixel >> 16) & 0xff) | (pixel & 0xff00ff00);
q++;
}
}
}
image = image.mirrored();
}
void GLWidget::on_resizeButton_clicked()
{
setTool(RESIZE_TOOL);
}
void GLWidget::on_zoomButton_clicked()
{
setTool(ZOOM_TOOL);
}
void GLWidget::setTool(int tool)
{
int oldTool = currentTool;
currentTool = tool;
switch(tool)
{
case MOVE_TOOL:
changeCursor(Qt::OpenHandCursor);//previously Qt::SizeAllCursor
break;
case RESIZE_TOOL:
changeCursor(Qt::SplitHCursor);//previously Qt::SizeHorCursor
break;
case FIND_TOOL:
changeCursor(Qt::CrossCursor);
break;
case SELECT_TOOL:
changeCursor(Qt::WhatsThisCursor);//previously Qt::CrossCursor);
break;
case ZOOM_TOOL:
setCursor(zoomInCursor);
break;
case ANNOTATE_TOOL:
changeCursor(Qt::IBeamCursor);
break;
default:
currentTool = oldTool;
ui->print("Error: Tool ID unrecognized: ", tool);
}
}
int GLWidget::tool()
{
return currentTool;
}
void GLWidget::slideHorizontal(int x)
{
if(x != xPosition && x > 0 && x < setHorizontalScrollbarRange())
{
xPosition = x;
emit xOffsetChange((int)(x));
updateDisplay();
}
}
void GLWidget::invalidateDisplayGraphs()
{
setupColorTable();
qDebug() << "GlWidget::invalidateDisplayGraphs " << ++frame;
for(int i = 0; i < (int)graphs.size(); ++i)
{
graphs[i]->invalidate();
}
updateDisplay();
}
void GLWidget::updateDisplay()
{
redraw();
}
void GLWidget::updateDisplaySize()
{
int w = ui->getWidth();
ui->setSize( w * openGlGridHeight() );
}
AnnotationDisplay* GLWidget::addAnnotationDisplay(QString fName)
{
string fileName = fName.toStdString();
if( fileName.empty() )
{
fileName = trackReader->outputFile();
}
AnnotationDisplay* tempTrackDisplay = findMatchingAnnotationDisplay(fileName);
if( tempTrackDisplay != NULL)
{
//if the display already exists, then it will simply return that one,
//otherwise it will create a new Display
// ErrorBox msg("The file is already open");
}
else
{
vector<track_entry> track = trackReader->readFile(QString(fileName.c_str()));
ui->print("Annotations Received: ", track.size());
if( track.size() > 0)// || trackReader->outputFile().compare(fileName) == 0 )//
{
tempTrackDisplay = new AnnotationDisplay(ui, this, fileName);
addGraph(tempTrackDisplay);
tempTrackDisplay->newTrack( track );
}
}
return tempTrackDisplay;
}
void GLWidget::jumpToAnnotation(bool forward)
{
//scan for all the AnnotationDisplays
vector<AnnotationDisplay*> annotations = getAllAnnotationDisplays();
int startPosition = 1000000000;//end of file
if (!forward)
startPosition = 1;
//have each submit the position of the next annotation
for(int i = 0; i < (int)annotations.size(); ++i)
{
if(forward)
startPosition = min(startPosition, annotations[i]->getNextAnnotationPosition());
else //go backwards
startPosition = max(startPosition, annotations[i]->getPrevAnnotationPosition());
}
//jump to the first one (min)
if(startPosition < (int)seq()->size())
ui->setStart(glWidget, startPosition);
else if (startPosition <= 1)
ui->print("You have reached the beginning of the file.");
else
ui->print("There are no annotations further in the file.");
}
AnnotationDisplay* GLWidget::findMatchingAnnotationDisplay(string fileName)
{
vector<AnnotationDisplay*> aDisplays = getAllAnnotationDisplays();
AnnotationDisplay* tempTrackDisplay = NULL;
for ( int n = 0; n < (int)aDisplays.size(); n++)
{
if (aDisplays[n] != NULL && aDisplays[n]->getFileName().compare(fileName) == 0 )
{
tempTrackDisplay = aDisplays[n];
break;
}
}
return tempTrackDisplay;
}
vector<AnnotationDisplay*> GLWidget::getAllAnnotationDisplays()
{
vector<AnnotationDisplay*> annotations;
for ( int n = 0; n < (int)graphs.size(); n++)
{
AnnotationDisplay* testPtr = dynamic_cast<AnnotationDisplay*>(graphs[n]);
if ( testPtr != NULL )
annotations.push_back(testPtr);
}
return annotations;
}
void GLWidget::addTrackEntry(track_entry entry, string gtfFileName)
{
AnnotationDisplay* trackDisplay = addAnnotationDisplay(QString(gtfFileName.c_str()));
if (trackDisplay != NULL )
{
trackDisplay->addEntry(entry);
}
makeCurrent();
}
/*****************FUNCTIONS*******************/
void GLWidget::zoomToolActivate(bool zoomOut)
{
if(zoomOut || (abs(endPoint.y - startPoint.y) < 2 && abs(endPoint.x - startPoint.x) < 2))
{
float zoomFactor = 1.2;
if(zoomOut)
zoomFactor = 0.8;
int scale = ui->getScale();//take current scale
int index = startPoint.y * (ui->getWidth()/scale) + startPoint.x;
index *= scale;
index = max(0, index + ui->getStart(glWidget));
int newSize = (int)(ui->getSize() / zoomFactor);//calculate new projected size
int newStart = index - (newSize/2);//set start as centered point - size/2
//size should recalculate
int newScale = (int)(scale / zoomFactor) + (zoomFactor > 1.0? 0 : 1);//reduce scale by 10-20% (Nx4)
int zoom = ui->getZoom();
int newZoom = -1;
if( zoomFactor > 1.0 ) // we're zooming in
{
if(scale == 1)
{
newZoom = zoom * zoomFactor ;
newScale = -1;
}
}
else //zooming out
{
if(zoom > 100)
{
newZoom = max(100, ((int) (zoom * zoomFactor))) ;
newScale = -1;
}
}
ui->setAllVariables(-1, newScale, newZoom, newStart, newSize);
}
else // user selected range
{
pair<int,int> results = getSelectionOutcome();
if(results.first != -1)
{
zoomRange(results.first, results.second);
}
}
}
pair<int, int> GLWidget::getSelectionOutcome(bool getGraphConstraints)
{
int startIndex = 1;
int endIndex = 1;
int xOffset = 0;
for(int i = 0; i < (int)graphs.size(); ++i)
{
if(!graphs[i]->hidden)
{
pair<int,int> indices = graphs[i]->getIndicesFromPoints(point2D((startPoint.x - xOffset),startPoint.y), point2D((endPoint.x - xOffset),endPoint.y));
startIndex = min(indices.first, indices.second);
endIndex = max(indices.first, indices.second);
if (startIndex > 0 && endIndex > 0 )//&& endIndex < seq()->size())
{
if(getGraphConstraints)
{
return pair<int,int>(xOffset,(xOffset + graphs[i]->width()));
}
else // default behavior returns indicies
return pair<int,int>(startIndex,endIndex);
}
xOffset += graphs[i]->width() + border;
}
}
return pair<int,int>(-1,-1);
}
//***********KEY HANDLING**************
void GLWidget::keyPressEvent( QKeyEvent *event )
{
if( event->modifiers() & Qt::SHIFT && tool() == ZOOM_TOOL)
setCursor(zoomOutCursor);
int step = 10;
int tenLines = ui->getWidth() * step;
switch ( event->key() )//the keys should be passed directly to the widgets
{
case Qt::Key_Down:
ui->setStart(glWidget, ui->getStart(glWidget) + tenLines);
break;
case Qt::Key_Up:
ui->setStart(glWidget, ui->getStart(glWidget) - tenLines);
break;
case Qt::Key_Right:
ui->setWidth(ui->getWidth() + ui->getScale());
break;
case Qt::Key_Left:
ui->setWidth(ui->getWidth() - ui->getScale());
break;
default:
event->ignore();
return;
}
event->accept();
}
void GLWidget::keyReleaseEvent( QKeyEvent *event )
{
if( event->key() == Qt::Key_Shift && tool() == ZOOM_TOOL)
{
setCursor(zoomInCursor);
event->accept();
}
else{
QGLWidget::keyReleaseEvent( event );
}
}
//***********Functions*************
point2D GLWidget::pixelToGlCoords(QPoint mouse)
{
int x = mouse.x() / pixelsToOpenGlGridRatio() - border + xPosition;//TODO: scrollbar problem may be here
int y = mouse.y() / pixelsToOpenGlGridRatio();
return point2D(x, y);
}
int GLWidget::openGlGridHeight()
{
QSize dimensions = size();
double pixelHeight = dimensions.height();
return pixelToGlCoords(QPoint(0,pixelHeight)).y;
}
int GLWidget::openGlGridWidth()
{
QSize dimensions = size();
double pixelWidth = dimensions.width();
// double adjustedX = pixelWidth;// + xPosition * pixelsToOpenGlGridRatio();//TODO: scrollbar problem may be here
return pixelWidth / pixelsToOpenGlGridRatio();
}
void GLWidget::initializeGL()
{
qglClearColor(QColor::fromRgbF(0.5, 0.5, 0.5));//50% grey
glShadeModel(GL_FLAT);
glEnable(GL_DEPTH_TEST);
glDisable(GL_CULL_FACE);
marker = 0;//glGenLists(1);
for(int i = 0; i < (int)graphs.size(); ++i)
graphs[i]->setSequence(seq());
}
void GLWidget::paintGL()
{
updateDisplaySize();
setHorizontalScrollbarRange();
makeCurrent();
// qDebug() << "GlWidget Frame: " << ++frame;
glMatrixMode(GL_MODELVIEW);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glLoadIdentity();
glPushMatrix();
glTranslated(-xPosition * pixelsToOpenGlGridRatio() , 0, 0);
double zoom = pixelsToOpenGlGridRatio();
glScaled(zoom, zoom, zoom);
glTranslated(border,0,0);//to get zoom working right
if( tool() == SELECT_TOOL || tool() == FIND_TOOL)
{
glCallList(marker);//possibly replace this with a blinking cursor
}
if (selectionBoxVisible)// tool() == ZOOM_TOOL && )
{
drawSelectionBox(startPoint, endPoint);
}
for(int i = 0; i < (int)graphs.size(); ++i)
{
if(!graphs[i]->hidden)
{
graphs[i]->display();
graphs[i]->displayLegend(openGlGridWidth(), openGlGridHeight());
glTranslated(graphs[i]->width() + border, 0 , 0);
}
}
glPopMatrix();
}
void GLWidget::resizeGL(int width, int height)
{
glViewport(0, 0, width, height);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
float left = 0;
float right = left + width;
float top = 0;
float bottom = top - height;
glOrtho(left, right, bottom, top, 0, 5000);
gluLookAt(0, 0, 40, //position and direction
0, 0, 0,
0, 1, 0);
glMatrixMode(GL_MODELVIEW);
setHorizontalScrollbarRange();
updateDisplaySize();
}
void pushNonEmpty(vector<string>& arr, string str)
{
if(!str.empty())
arr.push_back(str);
}
QString grabFirstNonEmpty(vector<string> array)
{
for(int i = 0; i < (int)array.size(); ++i)
if(!array[i].empty())
return QString(array[i].substr(0,1000).c_str());//truncating the string in the case where NucleotideDisplay dumps a 1Mbp sequence
return QString();
}
bool GLWidget::event(QEvent* event)
{
if (event->type() == QEvent::ToolTip)
{
QHelpEvent *helpEvent = static_cast<QHelpEvent *>(event);
point2D oglCoords = pixelToGlCoords(helpEvent->pos());
QString text = grabFirstNonEmpty(mouseOverText(oglCoords));
if( !text.isEmpty() )
{
QToolTip::showText(helpEvent->globalPos(), text);
}
else{
QToolTip::hideText();
event->ignore();
}
return true;
}
return QGLWidget::event(event);
}
vector<string> GLWidget::mouseOverText(point2D oglCoords)
{
vector<string> responses;
/*Progressively decrement x based on the cumulative width of modules
The order here is important and should match the left to right display order*/
for(int i = 0; i < (int)graphs.size(); ++i)
{
if(!graphs[i]->hidden)
{
if(tool() == SELECT_TOOL )
pushNonEmpty(responses, graphs[i]->SELECT_MouseClick(oglCoords));
if(tool() == FIND_TOOL)
pushNonEmpty(responses, graphs[i]->FIND_MouseClick(oglCoords));
oglCoords.x -= graphs[i]->width() + border;
}
}
return responses;
}
void GLWidget::mousePressEvent(QMouseEvent* event)
{
parent->mousePressEvent(event);
startPoint = pixelToGlCoords(event->pos());
if(tool() == SELECT_TOOL || tool() == FIND_TOOL)
placeMarker(event->pos());
if(tool() == SELECT_TOOL || tool() == FIND_TOOL)
{
vector<string> responses = mouseOverText( startPoint);
if(tool() == SELECT_TOOL)
{
for(int i = 0; i < (int)responses.size(); ++i)
ui->print(responses[i]);
}
if(tool() == FIND_TOOL)
{
for(int i = 0; i < (int)responses.size(); ++i)
highlight->setHighlightSequence(QString(responses[i].c_str()));
}
}
if(tool() == MOVE_TOOL )
changeCursor(Qt::ClosedHandCursor);
if(tool() == ZOOM_TOOL || tool() == ANNOTATE_TOOL )
{
selectionBoxVisible = true;
}
endPoint = startPoint;
mousePressPosition = event->pos();
}
void GLWidget::mouseMoveEvent(QMouseEvent *event)
{
point2D old = pixelToGlCoords(mouseMovePosition);
endPoint = pixelToGlCoords(event->pos());
if(tool() == SELECT_TOOL || tool() == FIND_TOOL)
placeMarker(event->pos());
float dx = (endPoint.x - old.x);
float dy = (endPoint.y - old.y);
if (event->buttons() & Qt::LeftButton)
{
if((tool()== RESIZE_TOOL || tool()== MOVE_TOOL) && (event->modifiers() & Qt::ControlModifier))
{
translateOffset(-dx, dy);
}
else{
if(tool() == MOVE_TOOL)
translate(-dx, dy);
if(tool() == RESIZE_TOOL)
{
translate(0, dy);//still scroll up/down
int value = static_cast<int>(dx * ui->getScale() + ui->getWidth() + 0.5);
ui->setWidth(value);
}
}
if(tool() == ZOOM_TOOL && selectionBoxVisible )
{
}
invalidateDisplayGraphs();
}
mouseMovePosition = event->pos();
}
void GLWidget::mouseReleaseEvent(QMouseEvent *event)
{
mouseReleasePosition = event->pos();
endPoint = pixelToGlCoords(event->pos());
if(tool() == MOVE_TOOL )
changeCursor(Qt::OpenHandCursor);
if( selectionBoxVisible)
{
selectionBoxVisible = false;
if(tool() == ZOOM_TOOL )
{
bool zoomingOut = (event->modifiers() & Qt::SHIFT) || (event->button() == Qt::RightButton);
if(zoomingOut)
setCursor(zoomOutCursor);
else
setCursor(zoomInCursor);
zoomToolActivate(zoomingOut);
}
if (tool() == ANNOTATE_TOOL )
{
pair<int,int> results = getSelectionOutcome();
if(results.first != -1)
trackReader->addBookmark(results.first, results.second);
}
}
}
//m:draw Selection box
void GLWidget::drawSelectionBox(point2D start,point2D end) //, int lineStart, int lineEnd
{
if(selectionBoxVisible)
{
if (start.y > end.y || (start.y == end.y && start.x > end.x)) //if you drag up,
{
point2D temp = start;//swap the top and bottom of the box
start = end;
end = temp;
}
pair<int,int> graphConstraints = getSelectionOutcome(true); //
int lineStart = graphConstraints.first;
int lineEnd = graphConstraints.second;
if (lineStart != -1) // force points to be in bounds and make pretty squared off boxes
{
if (start.x < lineStart)
start.x = lineStart;
if (start.x >= lineEnd)
{
start.x = lineStart;
++start.y;
}
if (end.x > lineEnd)
end.x = lineEnd;
if (end.x < lineStart)
{
end.x = lineEnd;
--end.y;
}
// hairline edge
color c = color(200,185,60);
double lineThickness = 0.3;
//draw the ragged box edge
nuc->paint_line(point((lineStart - lineThickness), -(start.y + 1 - lineThickness),0), point(start.x, -(start.y + 1),0), c); //top left
nuc->paint_line(point((start.x - lineThickness), -(start.y - lineThickness),0), point(start.x, -(start.y + 1),0), c); //top jog
nuc->paint_line(point((start.x - lineThickness), -(start.y - lineThickness),0), point((lineEnd + lineThickness), -start.y,0), c); //top right
nuc->paint_line(point((lineStart - lineThickness), -(end.y + 1),0), point((end.x + lineThickness), -(end.y + 1 + lineThickness),0), c); //bottom left
nuc->paint_line(point(end.x, -end.y,0), point((end.x + lineThickness), -(end.y + 1 + lineThickness),0), c); //bottom jog
nuc->paint_line(point(end.x, -end.y,0), point((lineEnd + lineThickness), -(end.y + lineThickness),0), c); //bottom right
nuc->paint_line(point((lineStart - lineThickness), -(start.y + 1 - lineThickness),0), point(lineStart, -(end.y + 1 + lineThickness),0), c); //left
nuc->paint_line(point(lineEnd, -start.y,0), point((lineEnd + lineThickness), -(end.y + lineThickness),0), c); //right
// adjust to taste
c = color(255,235,80);
lineThickness = max(1.0, (double)(2.75 - (ui->getZoom())/400)); // thickness scales inversely to zoom level
// double lineThickness = 1.5;
//draw the ragged box
nuc->paint_line(point((lineStart - lineThickness), -(start.y + 1 - lineThickness),0), point(start.x, -(start.y + 1),0), c); //top left
nuc->paint_line(point((start.x - lineThickness), -(start.y - lineThickness),0), point((lineEnd + lineThickness), -start.y,0), c); //top right
nuc->paint_line(point((lineStart - lineThickness), -(end.y + 1),0), point((end.x + lineThickness), -(end.y + 1 + lineThickness),0), c); //bottom left
nuc->paint_line(point(end.x, -end.y,0), point((lineEnd + lineThickness), -(end.y + lineThickness),0), c); //bottom right
nuc->paint_line(point((lineStart - lineThickness), -(start.y + 1 - lineThickness),0), point(lineStart, -(end.y + 1 + lineThickness),0), c); //left
nuc->paint_line(point(lineEnd, -start.y,0), point((lineEnd + lineThickness), -(end.y + lineThickness),0), c); //right
}
}
}
void GLWidget::translate(float dx, float dy)
{
if(dy != 0.0)
{
int sign = (int)(dy / fabs(dy));
int move = -1* static_cast<int>(dy + (sign*0.5)) * ui->getWidth();
int current = ui->getStart(glWidget);
ui->setStart(glWidget, max(1, current+move) );
}
slideHorizontal((int)(xPosition + dx + .5));
}
void GLWidget::translateOffset(float dx, float dy)
{
int moveUp = 0;
if(dy != 0.0)
{
int sign = (int)(dy / fabs(dy));
moveUp = -1* static_cast<int>(dy + (sign*0.5)) * ui->getWidth() * 2;
}
// int current = ui->offsetDial->value();
if(dx != 0.0)
{
int sign = (int)(dx / fabs(dx));
dx = (int)(dx + (0.5 * sign));
}
ui->setOffsetDelta( this, (int)( moveUp + dx));
}
void GLWidget::changeCursor(Qt::CursorShape cNumber)
{
setCursor(QCursor(cNumber));
}
void GLWidget::placeMarker(QPoint pixelCoords)
{
point2D pt = pixelToGlCoords(pixelCoords);
//glDeleteLists(marker, 1);
marker = glGenLists(1);
glNewList(marker, GL_COMPILE);