qt - Draw text on scrollbar -


i wondering if possible draw text inside scrollbar. more specifically, inside "grab-able block" of scroll widget.
i'm using pythonqt, can't make own widgets. need default widgets.
way purely in qt?

a more graphical representation of need:

(vanilla: 'x's 'grabbale handle')
-------------------------------------------------------
|......xxxxxxxxxxxx......................................|
-------------------------------------------------------

(target)
-------------------------------------------------------
|......xx custom text here! xx.......................|
-------------------------------------------------------

thanks!

edit: removed claustrophobic pythonqt requirement :)

http://www.qtcentre.org/threads/15032-qscrollbar-subclass-constructor-ignores-orientation-qt4-4

you want similar qscrollbar subclass.

mainwindow.cpp

#include "mainwindow.h" #include <qscrollarea> #include "scrollbar.h"  mainwindow::mainwindow(qwidget *parent)     : qmainwindow(parent) {     qscrollarea * sa = new qscrollarea;      sa->setverticalscrollbar(new scrollbar(qt::vertical));     sa->sethorizontalscrollbar(new scrollbar(qt::horizontal));     qwidget *w = new qwidget;     sa->setwidget(w);      w->setfixedsize(1000, 1000);     this->setcentralwidget(sa); }

scrollbar.h

#ifndef scrollbar_h #define scrollbar_h  #include <qscrollbar> #include <qpaintevent>  class scrollbar : public qscrollbar {     q_object public:     scrollbar ( qt::orientation orientation, qwidget * parent = 0 ); public slots:  signals:  protected:     void paintevent(qpaintevent* event); };  #endif // scrollbar_h

scrollbar.cpp

#include "scrollbar.h" #include <qpainter>  double map(double x1, double x, double x2, double y1, double y2) {     return y1 + (y2 -y1)*(x - x1)/(x2 - x1); }  scrollbar::scrollbar( qt::orientation orientation, qwidget * parent ):      qscrollbar (orientation, parent) {  }  void scrollbar::paintevent(qpaintevent * event) {     int x, y, w, h;     this->rect().getrect(&x,&y,&w,&h);     // calls base class's paint calls     qscrollbar::paintevent(event);     // following painted on top of     qpainter p(this);     p.setpen(qpen(qt::red,1));     if(this->orientation() == qt::horizontal)     {         // difficult inspect size of slider out of qscrollbar         // , position.  draws red box moves slider pos         int delta = map(this->minimum(), this->sliderposition(),                          this->maximum(), 0, this->width()*3/4);         p.drawrect(sliderposition(),y,width()/4,h);     }     else     {         int delta = map(this->minimum(), this->sliderposition(),                          this->maximum(), 0, this->height()*3/4);         p.drawrect(x,sliderposition(),w,height()/4);     }     // draw text inside p.drawtext }

determining exact size of slider might possible other methods used qstyle. here information digging through of qt sources:

qscrollbar.cpp

excerpts qt sources

void qscrollbar::paintevent(qpaintevent *) {     q_d(qscrollbar);     qpainter p(this);     qstyleoptionslider opt;     initstyleoption(&opt);     opt.subcontrols = qstyle::sc_all;     if (d->pressedcontrol) {         opt.activesubcontrols = (qstyle::subcontrol)d->pressedcontrol;         if (!d->pointeroutsidepressedcontrol)             opt.state |= qstyle::state_sunken;     } else {         opt.activesubcontrols = (qstyle::subcontrol)d->hovercontrol;     }     style()->drawcomplexcontrol(qstyle::cc_scrollbar, &opt, &p, this); }

qcommonstyle.cpp

 // style()->drawcomplexcontrol(qstyle::cc_scrollbar if (const qstyleoptionslider *scrollbar = qstyleoption_cast<const qstyleoptionslider *>(opt)) {     // make copy here , reset each primitive.     qstyleoptionslider newscrollbar = *scrollbar;     state saveflags = scrollbar->state;      if (scrollbar->subcontrols & sc_scrollbarsubline) {         newscrollbar.state = saveflags;         newscrollbar.rect = proxy()->subcontrolrect(cc, &newscrollbar, sc_scrollbarsubline, widget);         if (newscrollbar.rect.isvalid()) {             if (!(scrollbar->activesubcontrols & sc_scrollbarsubline))                 newscrollbar.state &= ~(state_sunken | state_mouseover);             proxy()->drawcontrol(ce_scrollbarsubline, &newscrollbar, p, widget);         }     }     if (scrollbar->subcontrols & sc_scrollbaraddline) {         newscrollbar.rect = scrollbar->rect;         newscrollbar.state = saveflags;         newscrollbar.rect = proxy()->a (cc, &newscrollbar, sc_scrollbaraddline, widget);         if (newscrollbar.rect.isvalid()) {             if (!(scrollbar->activesubcontrols & sc_scrollbaraddline))                 newscrollbar.state &= ~(state_sunken | state_mouseover);             proxy()->drawcontrol(ce_scrollbaraddline, &newscrollbar, p, widget);         }     }     if (scrollbar->subcontrols & sc_scrollbarsubpage) {         newscrollbar.rect = scrollbar->rect;         newscrollbar.state = saveflags;         newscrollbar.rect = proxy()->subcontrolrect(cc, &newscrollbar, sc_scrollbarsubpage, widget);         if (newscrollbar.rect.isvalid()) {             if (!(scrollbar->activesubcontrols & sc_scrollbarsubpage))                 newscrollbar.state &= ~(state_sunken | state_mouseover);             proxy()->drawcontrol(ce_scrollbarsubpage, &newscrollbar, p, widget);         }     }     if (scrollbar->subcontrols & sc_scrollbaraddpage) {         newscrollbar.rect = scrollbar->rect;         newscrollbar.state = saveflags;         newscrollbar.rect = proxy()->subcontrolrect(cc, &newscrollbar, sc_scrollbaraddpage, widget);         if (newscrollbar.rect.isvalid()) {             if (!(scrollbar->activesubcontrols & sc_scrollbaraddpage))                 newscrollbar.state &= ~(state_sunken | state_mouseover);             proxy()->drawcontrol(ce_scrollbaraddpage, &newscrollbar, p, widget);         }     }     if (scrollbar->subcontrols & sc_scrollbarfirst) {         newscrollbar.rect = scrollbar->rect;         newscrollbar.state = saveflags;         newscrollbar.rect = proxy()->subcontrolrect(cc, &newscrollbar, sc_scrollbarfirst, widget);         if (newscrollbar.rect.isvalid()) {             if (!(scrollbar->activesubcontrols & sc_scrollbarfirst))                 newscrollbar.state &= ~(state_sunken | state_mouseover);             proxy()->drawcontrol(ce_scrollbarfirst, &newscrollbar, p, widget);         }     }     if (scrollbar->subcontrols & sc_scrollbarlast) {         newscrollbar.rect = scrollbar->rect;         newscrollbar.state = saveflags;         newscrollbar.rect = proxy()->subcontrolrect(cc, &newscrollbar, sc_scrollbarlast, widget);         if (newscrollbar.rect.isvalid()) {             if (!(scrollbar->activesubcontrols & sc_scrollbarlast))                 newscrollbar.state &= ~(state_sunken | state_mouseover);             proxy()->drawcontrol(ce_scrollbarlast, &newscrollbar, p, widget);         }     }     if (scrollbar->subcontrols & sc_scrollbarslider) {         newscrollbar.rect = scrollbar->rect;         newscrollbar.state = saveflags;         newscrollbar.rect = proxy()->subcontrolrect(cc, &newscrollbar, sc_scrollbarslider, widget);         if (newscrollbar.rect.isvalid()) {             if (!(scrollbar->activesubcontrols & sc_scrollbarslider))                 newscrollbar.state &= ~(state_sunken | state_mouseover);             proxy()->drawcontrol(ce_scrollbarslider, &newscrollbar, p, widget);              if (scrollbar->state & state_hasfocus) {                 qstyleoptionfocusrect fropt;                 fropt.qstyleoption::operator=(newscrollbar);                 fropt.rect.setrect(newscrollbar.rect.x() + 2, newscrollbar.rect.y() + 2,                                    newscrollbar.rect.width() - 5,                                    newscrollbar.rect.height() - 5);                 proxy()->drawprimitive(pe_framefocusrect, &fropt, p, widget);             }         }     } } break;

hope helps.


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