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Even prettier Pie Chart

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This commit is contained in:
Mark Watkins 2011-06-29 01:44:44 +10:00
parent 6f0d0cc6f2
commit d733a08a38
3 changed files with 17 additions and 9 deletions
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22
Graphs/gpiechart.cpp
View File

@ -33,14 +33,14 @@ void gPieChart::Plot(gGraphWindow & w,float scrx,float scry)
double j=0.0;
double sum=0.0;
double step=1.0/360.0;
double step=1.0/45.0;
float px,py;
//glEnable(GL_TEXTURE_2D);
//glEnable(GL_DEPTH_TEST);
glEnable(GL_BLEND);
//glEnable(GL_POLYGON_SMOOTH);
glEnable(GL_LINE_SMOOTH);
glLineWidth(1);
glLineWidth(1.5);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
//glBlendFunc( GL_SRC_ALPHA_SATURATE, GL_ONE );
//glHint(GL_POLYGON_SMOOTH_HINT, GL_NICEST);
@ -49,30 +49,38 @@ void gPieChart::Plot(gGraphWindow & w,float scrx,float scry)
j=(data->point[0][i].y()/total); // ratio of this pie slice
QColor col1=color[i % color.size()];
w.qglColor(col1);
glPolygonMode(GL_FRONT_AND_BACK,GL_FILL);
glPolygonMode(GL_BACK,GL_FILL);
glBegin(GL_POLYGON);
glVertex2f(start_px+radius+4, start_py+radius+4);
for (double q=sum;q<sum+j;q+=step) {
double q;
for (q=sum;q<sum+j;q+=step) {
px=start_px+radius+4+sin(q*2*M_PI)*radius;
py=start_py+radius+4+cos(q*2*M_PI)*radius;
glVertex2f(px,py);
}
q=sum+j;
px=start_px+radius+4+sin(q*2*M_PI)*radius;
py=start_py+radius+4+cos(q*2*M_PI)*radius;
glVertex2f(px,py);
glEnd();
glPolygonMode(GL_BACK,GL_LINE);
w.qglColor(Qt::black);
glBegin(GL_POLYGON);
glVertex2f(start_px+radius+4, start_py+radius+4);
for (double q=sum;q<sum+j;q+=step) {
for (q=sum;q<sum+j;q+=step) {
px=start_px+radius+4+sin(q*2*M_PI)*radius;
py=start_py+radius+4+cos(q*2*M_PI)*radius;
glVertex2f(px,py);
}
q=sum+j;
px=start_px+radius+4+sin(q*2*M_PI)*radius;
py=start_py+radius+4+cos(q*2*M_PI)*radius;
glVertex2f(px,py);
glEnd();
sum+=j;
sum=q;
}
glDisable(GL_POLYGON_SMOOTH);
glDisable(GL_BLEND);

2
Graphs/graphwindow.cpp
View File

@ -690,7 +690,7 @@ void gGraphWindow::Render(float w, float h)
glEnd();
} else {
glClearColor(0,0,0,255);
glClearColor(255,255,255,255);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
// glClear(GL_COLOR_BUFFER_BIT);
}

2
daily.cpp
View File

@ -210,7 +210,7 @@ Daily::Daily(QWidget *parent,QGLContext *context) :
l->color.push_back(QColor(20,20,20,255));
l->color.push_back(QColor("light green"));
G_AHI->AddLayer(l);
//G_AHI->SetDrawBackground(false);
G_AHI->SetDrawBackground(false);
//G_AHI->setMaximumSize(2000,30);
//TAP->setMaximumSize(2000,30);
NoData=new QLabel(tr("No CPAP Data"),gSplitter);