Remove that empty action

imageinfodata.cpp

@@ -266,6 +266,16 @@ QString SkyPoint::toString() const
     return QString("RA: %1 DEC: %2° %3' %4\"").arg(t.toString("HH'h' mm'm' ss's'")).arg(deg, 2, 'f', 0, '0').arg(min, 2, 'f', 0, '0').arg(sec, 2, 'f', 0, '0');
 }
 
+QString SkyPoint::RAString() const
+{
+    return toHMS(ra / 15);
+}
+
+QString SkyPoint::DECString() const
+{
+    return toDMS(dec);
+}
+
 double SkyPoint::fromHMS(const QString &hms)
 {
     double deg = fromDMS(hms);
@@ -308,11 +318,13 @@ QString SkyPoint::toHMS(double decHour)
 
 QString SkyPoint::toDMS(double deg)
 {
+    int sign = deg < 0.0 ? -1 : 1;
+    deg *= sign;
     double d,m,s,md;
     md = std::modf(deg, &d) * 60.0;
     s = std::modf(md, &m) * 60.0;
 
-    return QString("%1˚ %2' %3\"").arg((int)d, 2, 10, QChar('0')).arg((int)m, 2, 10, QChar('0')).arg((int)s, 2, 10, QChar('0'));
+    return QString("%1˚ %2' %3\"").arg((int)d * sign, 2, 10, QChar('0')).arg((int)m, 2, 10, QChar('0')).arg((int)s, 2, 10, QChar('0'));
 }
 
 SkyPointScale ImageInfoData::getCenterRaDec() const

imageinfodata.h

@@ -36,6 +36,8 @@ public:
     double RAHour() const { return ra / 15.0; }
     double DEC() const { return dec; }
     QString toString() const;
+    QString RAString() const;
+    QString DECString() const;
     static double fromHMS(const QString &hms);
     static double fromDMS(const QString &dms);
     static QString toHMS(double decHour);

imagewidget.cpp

@@ -26,6 +26,8 @@ struct RawImageType
     QOpenGLTexture::PixelType dataType;
 };
 
+void prepareGrid(WCSDataT *wcs, uint32_t w, uint32_t h, QPainterPath &grid, QPainterPath &text);
+
 RawImageType getRawImageType(const RawImage *img)
 {
     RawImageType type;
@@ -180,6 +182,10 @@ void ImageWidgetGL::setImage(std::shared_ptr<RawImage> image, int index)
 void ImageWidgetGL::setWCS(std::shared_ptr<WCSDataT> wcs)
 {
     m_wcs = wcs;
+    m_grid.clear();
+    m_text.clear();
+    if(m_drawGrid)
+        prepareGrid(m_wcs.get(), m_imgWidth, m_imgHeight, m_grid, m_text);
 }
 
 void ImageWidgetGL::zoom(int zoom, const QPointF &mousePos)
@@ -496,6 +502,119 @@ void swPaint(std::shared_ptr<RawImage> &rawImage, float dx, float dy, float scal
     painter.drawImage(0, 0, img);
 }
 
+void prepareGrid(WCSDataT *wcs, uint32_t w, uint32_t h, QPainterPath &grid, QPainterPath &text)
+{
+    if(!wcs)return;
+
+    double minRa, maxRa, minDec, maxDec, crVal1, crVal2;
+    wcs->calculateBounds(minRa, maxRa, minDec, maxDec, crVal1, crVal2);
+
+    double raStep = 15;
+    double decStep = 15;
+    double raRange = maxRa - minRa;
+    double decRange = maxDec - minDec;
+    const QVector<double> raSteps = {15, 5, 2.5, 1.25, 0.25, 20/240.0, 10/240.0, 5/240.0, 1/240.0};
+    const QVector<double> decSteps = {20, 10, 5, 2, 1, 20/60.0, 10/60.0, 5/60.0, 2/60.0, 1/60.0, 20/3600.0, 10/3600.0, 5/3600.0, 2/3600.0, 1/3600.0};
+
+    for(double ra : raSteps)
+    {
+        if(ra * 5 <= raRange)
+        {
+            raStep = ra;
+            break;
+        }
+    }
+
+    for(double dec : decSteps)
+    {
+        if(dec * 5 <= decRange)
+        {
+            decStep = dec;
+            break;
+        }
+    }
+
+    minRa -= std::fmod(minRa, raStep);
+    minDec -= std::fmod(minDec, decStep);
+    if(minRa < 0)minRa -= raStep;
+    if(minDec < 0)minDec -= decStep;
+
+    QRectF clip(0, 0, w, h);
+
+    maxRa += raStep;
+    maxDec += decStep;
+    for(double ra = minRa; ra <= maxRa; ra += raStep)
+    {
+        QPointF p;
+        wcs->worldToPixel(SkyPoint(ra, minDec), p);
+        grid.moveTo(p);
+        for(double dec = minDec + decStep * 0.02; dec <= maxDec; dec += decStep * 0.02)
+        {
+            wcs->worldToPixel(SkyPoint(ra, dec), p);
+            grid.lineTo(p);
+        }
+    }
+
+    for(double dec = minDec; dec <= maxDec; dec += decStep)
+    {
+        QPointF p;
+        wcs->worldToPixel(SkyPoint(minRa, dec), p);
+        grid.moveTo(p);
+        for(double ra = minRa + raStep * 0.02; ra <= maxRa; ra += raStep * 0.02)
+        {
+            wcs->worldToPixel(SkyPoint(ra, dec), p);
+            grid.lineTo(p);
+        }
+    }
+
+    SkyPoint sp1, sp2,orig;
+    wcs->pixelToWorld(QPointF(-1, -1), orig);
+    sp1 = orig;
+    QFont font("Sans", 12);
+    for(uint32_t x = 0; x < w; x++)
+    {
+        QPointF p(x, 0);
+        if(!wcs->pixelToWorld(p, sp2))
+            break;
+
+        if(static_cast<int>(sp1.RA() / raStep) != static_cast<int>(sp2.RA() / raStep))
+            text.addText(p + QPointF(0, 14), font, std::abs(sp1.RA()) > std::abs(sp2.RA()) ? sp1.RAString() : sp2.RAString());
+
+        if(static_cast<int>(sp1.DEC() / decStep) != static_cast<int>(sp2.DEC() / decStep))
+            text.addText(p + QPointF(0, 14), font, std::abs(sp1.DEC()) > std::abs(sp2.DEC()) ? sp1.DECString() : sp2.DECString());
+
+        sp1 = sp2;
+    }
+
+    sp1 = orig;
+    for(uint32_t y = 0; y < h; y++)
+    {
+        QPointF p(0, y);
+        if(!wcs->pixelToWorld(p, sp2))
+            break;
+
+        if(static_cast<int>(sp1.RA() / raStep) != static_cast<int>(sp2.RA() / raStep))
+            text.addText(p + QPointF(2, 0), font, std::abs(sp1.RA()) > std::abs(sp2.RA()) ? sp1.RAString() : sp2.RAString());
+
+        if(static_cast<int>(sp1.DEC() / decStep) != static_cast<int>(sp2.DEC() / decStep))
+            text.addText(p + QPointF(2, 0), font, std::abs(sp1.DEC()) > std::abs(sp2.DEC()) ? sp1.DECString() : sp2.DECString());
+
+        sp1 = sp2;
+    }
+}
+
+void ImageWidgetGL::drawGrid(bool enable)
+{
+    if(m_grid.elementCount() == 0)
+        prepareGrid(m_wcs.get(), m_imgWidth, m_imgHeight, m_grid, m_text);
+
+    if(enable != m_drawGrid)
+    {
+        m_drawGrid = enable;
+        update();
+    }
+}
+
 void ImageWidgetGL::paintGL()
 {
     float dx = m_dx;
@@ -613,6 +732,25 @@ void ImageWidgetGL::paintGL()
             m_program->setUniformValue("colormapIdx", m_colormapIdx);
             f->glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
             m_vao->release();
+
+            if(m_drawGrid)
+            {
+                QPainter painter(this);
+                painter.setRenderHint(QPainter::Antialiasing);
+                painter.setRenderHint(QPainter::TextAntialiasing);
+
+                painter.setPen(QPen(Qt::yellow, 1.0 / m_scale));
+                QTransform tran;
+                tran.translate(-std::floor(dx), -std::floor(dy));
+                tran.scale(m_scale, m_scale);
+                painter.setTransform(tran);
+                painter.setClipRect(0, 0, m_imgWidth, m_imgHeight);
+                painter.drawPath(m_grid);
+                painter.setPen(Qt::NoPen);
+                painter.setBrush(Qt::yellow);
+                painter.drawPath(m_text);
+            }
+
         }
     }
 

imagewidget.h

@@ -8,6 +8,7 @@
 #include <QOpenGLTexture>
 #include <QOpenGLVertexArrayObject>
 #include <QOpenGLFunctions>
+#include <QPainterPath>
 #include "database.h"
 #include "rawimage.h"
 #include "imageinfodata.h"
@@ -37,6 +38,7 @@ public:
     virtual QImage renderToImage() = 0;
     virtual void thumbnailLoaded(const Image *image) = 0;
     virtual void showThumbnail(bool enable) = 0;
+    virtual void drawGrid(bool enable) = 0;
 
     static QImage loadColormap();
 };
@@ -70,6 +72,8 @@ class ImageWidgetGL : public QOpenGLWidget, public ImageWidget
     GLuint m_debayerTex = 0;
     std::shared_ptr<RawImage> m_rawImage;
     std::shared_ptr<WCSDataT> m_wcs;
+    QPainterPath m_grid;
+    QPainterPath m_text;
     int m_width, m_height;
     int m_imgWidth = -1, m_imgHeight = -1;
     int m_currentImg = 0;
@@ -87,6 +91,7 @@ class ImageWidgetGL : public QOpenGLWidget, public ImageWidget
     bool m_selecting = false;
     bool m_sizesDirty = false;
     bool m_srgb = false;
+    bool m_drawGrid = false;
     int m_thumbnailCount = 0;
     int m_maxTextureSize = 0;
     int m_maxArrayLayers = 0;
@@ -116,6 +121,7 @@ public:
     QImage renderToImage() override;
     void thumbnailLoaded(const Image *image) override;
     void showThumbnail(bool enable) override;
+    void drawGrid(bool enable) override;
 protected:
     void paintGL() override;
     void resizeGL(int w, int h) override;

mainwindow.cpp

@@ -263,7 +263,9 @@ MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent)
     QAction *slideshowAction = viewMenu->addAction(tr("Slideshow"), Qt::Key_F3, m_ringList, &ImageRingList::toggleSlideshow);
     slideshowAction->setCheckable(true);
     viewMenu->addSeparator();
-    viewMenu->addActions(m_stretchPanel->actions());
+    auto actionList = m_stretchPanel->actions();
+    actionList.removeFirst();
+    viewMenu->addActions(actionList);
     menuBar()->addMenu(viewMenu);
 
     QMenu *selectMenu = new QMenu(tr("Select"), this);