TGSlider+¶

Slider widgets allow easy selection of a range.Sliders can be either horizontal or vertical oriented and there isa choice of two different slider types and three different typesof tick marks.

TGSlider is an abstract base class. Use the concrete TGVSlider and TGHSlider.

Dragging the slider will generate the event:                         
kC_VSLIDER, kSL_POS, slider id, position  (for vertical slider)      
kC_HSLIDER, kSL_POS, slider id, position  (for horizontal slider)    
                                                                   
Pressing the mouse will generate the event:                         
kC_VSLIDER, kSL_PRESS, slider id, 0  (for vertical slider)           
kC_HSLIDER, kSL_PRESS, slider id, 0  (for horizontal slider)         

Releasing the mouse will generate the event:                         
kC_VSLIDER, kSL_RELEASE, slider id, 0  (for vertical slider)         
kC_HSLIDER, kSL_RELEASE, slider id, 0  (for horizontal slider) 

TGSlider 继承 TGFrame, TGWidget

TGVSlider 继承 TGSliderVertical slider widget

TGHSlider 继承 TGSliderHorizontal slider widget

class¶

//--- sizes for vert. and horz. sliders

enum ESliderSize {
   kSliderWidth  = 24,
   kSliderHeight = kSliderWidth
};


enum ESliderType {
   //--- slider types (type of slider picture)
   kSlider1        = BIT(0),
   kSlider2        = BIT(1),

   //--- scaling of slider
   kScaleNo        = BIT(2),
   kScaleDownRight = BIT(3),
   kScaleBoth      = BIT(4)
};

TGSlider

   TGSlider(const TGWindow *p = 0, UInt_t w = 1, UInt_t h = 1,
            UInt_t type = kSlider1 | kScaleBoth, Int_t id = -1,
            UInt_t options = kChildFrame,
            Pixel_t back = GetDefaultFrameBackground());

   virtual ~TGSlider() { }

   virtual Bool_t HandleButton(Event_t *event) = 0;
   virtual Bool_t HandleConfigureNotify(Event_t* event) = 0;
   virtual Bool_t HandleMotion(Event_t *event) = 0;

   virtual void  SetEnabled(Bool_t flag = kTRUE) { SetState( flag ); }              //*TOGGLE* *GETTER=IsEnabled
   virtual void  SetState(Bool_t state);
   virtual void  SetScale(Int_t scale) { fScale = scale; }                          //*MENU*
   virtual void  SetRange(Int_t min, Int_t max) { fVmin = min; fVmax = max; }       //*MENU*
   virtual void  SetPosition(Int_t pos) { fPos = pos; fClient->NeedRedraw(this); }  //*MENU*
   virtual Int_t GetPosition() const { return fPos; }
   virtual Int_t GetMinPosition() const { return fVmin; }
   virtual Int_t GetMaxPosition() const { return fVmax; }
   virtual Int_t GetScale() const { return fScale; }
   virtual void  MapSubwindows() { TGWindow::MapSubwindows(); }
   virtual void  ChangeSliderPic(const char *name) {
                    if (fSliderPic) fClient->FreePicture(fSliderPic);
                    fSliderPic = fClient->GetPicture(name);
                 }

   virtual void  PositionChanged(Int_t pos) { Emit("PositionChanged(Int_t)", pos); } // *SIGNAL*
   virtual void  Pressed() { Emit("Pressed()"); }    // *SIGNAL*
   virtual void  Released() { Emit("Released()"); }  // *SIGNAL*

TGVSlider

   TGVSlider(const TGWindow *p = 0, UInt_t h = 40,
             UInt_t type = kSlider1 | kScaleBoth, Int_t id = -1,
             UInt_t options = kVerticalFrame,
             Pixel_t back = GetDefaultFrameBackground());
   virtual ~TGVSlider();

   virtual Bool_t HandleButton(Event_t *event);
   virtual Bool_t HandleConfigureNotify(Event_t* event);
   virtual Bool_t HandleMotion(Event_t *event);
   virtual TGDimension GetDefaultSize() const
                     { return TGDimension(kSliderWidth, fHeight); }
   virtual void   Resize(UInt_t w, UInt_t h) { TGFrame::Resize(w, h ? h+16 : fHeight + 16); }
   virtual void   Resize(TGDimension size) { Resize(size.fWidth, size.fHeight); }
   virtual void   SavePrimitive(std::ostream &out, Option_t *option = "");

TGHSlider

   TGHSlider(const TGWindow *p = 0, UInt_t w = 40,
             UInt_t type = kSlider1 | kScaleBoth, Int_t id = -1,
             UInt_t options = kHorizontalFrame,
             Pixel_t back = GetDefaultFrameBackground());
   virtual ~TGHSlider();

   virtual Bool_t HandleButton(Event_t *event);
   virtual Bool_t HandleConfigureNotify(Event_t* event);
   virtual Bool_t HandleMotion(Event_t *event);
   virtual TGDimension GetDefaultSize() const
                     { return TGDimension(fWidth, kSliderHeight); }
   virtual void   Resize(UInt_t w, UInt_t h) { TGFrame::Resize(w ? w+16 : fWidth + 16, h); }
   virtual void   Resize(TGDimension size) { Resize(size.fWidth, size.fHeight); }
   virtual void   SavePrimitive(std::ostream &out, Option_t *option = "");

TGSlider+¶

class¶

code¶

example¶