From 4dd741db6fda89810d7d37083c979c9b1ef23905 Mon Sep 17 00:00:00 2001
From: Mark Watkins <jedimark@users.sourceforge.net>
Date: Sat, 6 Aug 2011 19:17:26 +1000
Subject: [PATCH] Minor Ticks for gXAxis

---
 Graphs/gXAxis.cpp | 210 +++++++++-------------------------------------
 1 file changed, 41 insertions(+), 169 deletions(-)

diff --git a/Graphs/gXAxis.cpp b/Graphs/gXAxis.cpp
index 11173cd2..98aeb8cb 100644
--- a/Graphs/gXAxis.cpp
+++ b/Graphs/gXAxis.cpp
@@ -32,7 +32,7 @@ gXAxis::~gXAxis()
 }
 void gXAxis::Plot(gGraphWindow & w,float scrx,float scry)
 {
-    float px,py;
+    double px,py;
 
     int start_px=w.GetLeftMargin();
     int start_py=w.GetBottomMargin();
@@ -53,25 +53,23 @@ void gXAxis::Plot(gGraphWindow & w,float scrx,float scry)
     qint64 xx=maxx-minx;
     if (xx<=0) return;
 
-    qint64 rxx=w.rmax_x-w.rmin_x;
 
-    QString fd,fmt;
+    QString fd,tmpstr;
     int divisors[]={86400000,3600000,2700000,1800000,1200000,900000,600000,300000,120000,60000,45000,30000,20000,15000,10000,5000,2000,1000,100,50};
     int divcnt=sizeof(divisors)/sizeof(int);
     int divmax,dividx;
     int fitmode;
     if (xx>86400000L) {         // Day
         fd="00 MMM";
-        fmt="dd MMM";
         dividx=0;
         divmax=1;
         fitmode=0;
-    } else if (xx>60000) {    // Minutes
+    } else if (xx>600000) {    // Minutes
         fd="00:00";
         dividx=1;
         divmax=10;
         fitmode=1;
-    } else if (xx>5000) {      // Seconds
+    } else if (xx>60000) {      // Seconds
         fd="00:00:00";
         dividx=9;
         divmax=16;
@@ -107,48 +105,48 @@ void gXAxis::Plot(gGraphWindow & w,float scrx,float scry)
         }
     }
     if (fit_ticks==0) {
-        qDebug() << "FitTicks==0!";
+        qDebug() << "gXAxis::Plot() FitTicks==0!";
         return;
     }
-    if (div<0) {
-        qDebug() << "div<0";
+    if ((div<0) || (div>divcnt)) {
+        qDebug() << "gXAxis::Plot() div out of bounds";
         return;
     }
     qint64 step=divisors[div];
 
-    qint64 zqvx=minx-w.rmin_x;              // Amount of time before minx
-    qint64 zz=zqvx/step;                  // Number of ticks that fit up to minx
-
-    //Align left minimum to divisor
+    //Align left minimum to divisor by losing precision
     qint64 aligned_start=minx/step;
     aligned_start*=step;
 
-    /*qint64 rm=w.rmin_x % step;     // Offset from rminx of an aligned time
-    rm=step-rm;
-    rm+=w.rmin_x;
-    //qint64 rd=w.rmin_x / divisors[div];
-    //rd*=divisors[div];
-    qint64 aligned_start=(zz*step)+rm; // First location of aligned point.
-*/
+    qint32 vertcnt=0;
+    GLshort * vertarray=vertex_array[0];
+    if (vertarray==NULL) {
+        qWarning() << "VertArray==NULL";
+        return;
+    }
 
     while (aligned_start<minx) {
         aligned_start+=step;
     }
-    aligned_start/=step;
-    aligned_start*=step;
 
     double xmult=double(width)/double(xx);
-    w.qglColor(Qt::black);
-    QString tmpstr;
+    double step_pixels=double(step/10.0)*xmult;
+    py=start_px+double(aligned_start-minx)*xmult;
+    for (int i=0;i<10;i++) {
+        py-=step_pixels;
+        if (py<start_px) continue;
+        vertarray[vertcnt++]=py;
+        vertarray[vertcnt++]=start_py;
+        vertarray[vertcnt++]=py;
+        vertarray[vertcnt++]=start_py-4;
+    }
     for (qint64 i=aligned_start;i<maxx;i+=step) {
         px=double(i-minx)*xmult;
         px+=start_px;
-        glBegin(GL_LINES);
-        glVertex2f(px,start_py);
-        glVertex2f(px,start_py-6);
-        glEnd();
-
-
+        vertarray[vertcnt++]=px;
+        vertarray[vertcnt++]=start_py;
+        vertarray[vertcnt++]=px;
+        vertarray[vertcnt++]=start_py-6;
         if (fitmode==0) {
         } else {
             qint64 j=i+tz_offset;
@@ -164,160 +162,34 @@ void gXAxis::Plot(gGraphWindow & w,float scrx,float scry)
                 tmpstr=QString("%1:%2:%3:%4").arg(h,2,10,QChar('0')).arg(m,2,10,QChar('0')).arg(s,2,10,QChar('0')).arg(ms,3,10,QChar('0'));
             }
         }
-        DrawText(w,tmpstr,px-(x/2),scry-(w.GetBottomMargin()-12),0);
-
-    }
-    int i=0;
-  /*  return;
-    // subtract 1.. align to first div unit
-
-
-    float zwv2=zqvx/max_ticks;              // Number of ticks that would fit before
-    float gv;
-    float res=fmodf(zwv2,gv);
-
-
-
-    double jj=1/max_ticks;
-    double minor_tick=max_ticks*double(xx);
-    double st2=minx; //double(int(frac*1440.0))/1440.0;
-    double st,q;
-
-    bool show_seconds=false;
-    bool show_milliseconds=false;
-    bool show_time=true;
-
-    double min_tick;
-    if (xx<86400000) {
-        //double rounding[16]={12,24,48,72,96,144,288,720,1440,2880,5760,8640,17280,86400,172800,345600}; // time rounding
-        double rounding[16]={7200000,3600000,1800000,1200000,900000,600000,300000,120000,60000,45000,30000,15000,10000,5000,2000,1000};
-        int ri;
-        for (ri=0;ri<16;ri++) {
-            st=round(st2*rounding[ri])/rounding[ri];
-            min_tick=round(minor_tick*rounding[ri])/rounding[ri];
-            q=xx/min_tick;  // number of ticks that fits in range
-            if (q<=jj) break; // compared to number of ticks that fit on screen.
-        }
-        if (min_tick<60000) show_seconds=true;
-        if (min_tick<10000) show_milliseconds=true;
-
-        if (min_tick<=1000)
-            min_tick=1000;
-    } else { // Day ticks..
-        show_time=false;
-        st=st2;
-        min_tick=1.0;
-        double mtiks=(x+20.0)/width;
-        double mt=mtiks*xx;
-        min_tick=mt;
-        //if (min_tick<1.0) min_tick=1.0;
-        //if (min_tick>10) min_tick=10;
-    }
-    if (min_tick<=0) {
-        qWarning() << "gXAxis::Plot() min_tick<=0 :(";
-        return;
-    }
-
-    double st3=st;
-    //while (st3>minx) {
-    //    st3-=min_tick/10.0;
-    //}
-    //st3+=min_tick/10.0;
-
-    py=w.GetBottomMargin();
-
-    qint32 vertcnt=0;
-    GLshort * vertarray=vertex_array[0];
-    if (vertarray==NULL) {
-        qWarning() << "VertArray==NULL";
-        return;
-    }
-
-    if (m_show_minor_ticks) {
-        for (double i=st3; i<=maxx; i+=min_tick/10.0) {
-            if (i<minx) continue;
-            px=(i-minx)*xmult+w.GetLeftMargin();
-            vertarray[vertcnt++]=px;
+        DrawText(w,tmpstr,px-(x/2),scry-(w.GetBottomMargin()-18),0);
+        py=px;
+        for (int j=1;j<10;j++) {
+            py+=step_pixels;
+            if (py>=scrx-w.GetRightMargin()) break;
             vertarray[vertcnt++]=py;
-            vertarray[vertcnt++]=px;
-            vertarray[vertcnt++]=py-4;
-            if (vertcnt>=maxverts) {
-                qWarning() << "gXAxis::Plot() maxverts exceeded trying to draw minor ticks";
-                return;
-            }
-        }
-    }
-
-
-    //while (st<minx) {
-    //    st+=min_tick/10.0;  // mucking with this changes the scrollyness of the ticker.
-    //}
-
-    int hour,minute,second,millisecond;
-    QDateTime d;
-    // Need to use Qpainter clipping..
-    // messy. :(
-    glScissor(w.GetLeftMargin()-20,0,width+20,w.GetBottomMargin());
-    glEnable(GL_SCISSOR_TEST);
-
-    //const double extra=min_tick/10.0;
-    const double extra=0;
-
-    for (double i=st; i<=maxx+extra; i+=min_tick) {
-        d=QDateTime::fromMSecsSinceEpoch(i);
-
-        if (show_time) {
-            minute=d.time().minute();
-            hour=d.time().hour();
-            second=d.time().second();
-            millisecond=d.time().msec();
-
-            if (show_milliseconds) {
-                fd.sprintf("%02i:%02i:%02i:%03i",hour,minute,second,millisecond);
-            } else if (show_seconds) {
-                fd.sprintf("%02i:%02i:%02i",hour,minute,second);
-            } else {
-                fd.sprintf("%02i:%02i",hour,minute);
-            }
-        } else {
-            fd=d.toString("MMM dd");
-        }
-
-        px=(i-minx)*xmult+w.GetLeftMargin();
-        if ((i>=st && i<=maxx) && (m_show_major_ticks)) {
-            vertarray[vertcnt++]=px;
+            vertarray[vertcnt++]=start_py;
             vertarray[vertcnt++]=py;
-            vertarray[vertcnt++]=px;
-            vertarray[vertcnt++]=py-6;
+            vertarray[vertcnt++]=start_py-4;
             if (vertcnt>=maxverts) {
-                qWarning() << "gXAxis::Plot() maxverts exceeded trying to draw Major ticks";
-                return;
+                break;
             }
         }
 
-        GetTextExtent(fd,x,y);
-        if (!show_time) {
-            DrawText(w,fd, px+y, scry-(py-(x/2)-8), 90.0);
-        } else {
-            DrawText(w,fd, px-(x/2), scry-(py-8-y));
+        if (vertcnt>=maxverts) {
+            qWarning() << "maxverts exceeded in gXAxis::Plot()";
+            break;
         }
-
-    }
-    // Draw the little ticks.
-    if (vertcnt>=maxverts) {
-        qWarning() << "maxverts exceeded in gYAxis::Plot()";
-        return;
     }
 
-    glLineWidth(1);
-    glColor3f(0,0,0);
     glEnableClientState(GL_VERTEX_ARRAY);
+    glLineWidth(1);
+    w.qglColor(Qt::black);
     glVertexPointer(2, GL_SHORT, 0, vertarray);
     glDrawArrays(GL_LINES, 0, vertcnt>>1);
     glDisableClientState(GL_VERTEX_ARRAY); // deactivate vertex arrays after drawing
 
     glDisable(GL_SCISSOR_TEST);
 
-*/
 }