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      1 /*
      2  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
      3  *
      4  * This library is free software; you can redistribute it and/or
      5  * modify it under the terms of the GNU Library General Public
      6  * License as published by the Free Software Foundation; either
      7  * version 2 of the License, or (at your option) any later version.
      8  *
      9  * This library is distributed in the hope that it will be useful,
     10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
     11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     12  * Library General Public License for more details.
     13  *
     14  * You should have received a copy of the GNU Library General Public License
     15  * along with this library; see the file COPYING.LIB.  If not, write to
     16  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
     17  * Boston, MA 02110-1301, USA.
     18  *
     19  */
     20 
     21 #ifndef HTMLMeterElement_h
     22 #define HTMLMeterElement_h
     23 
     24 #include "core/html/LabelableElement.h"
     25 
     26 namespace blink {
     27 
     28 class ExceptionState;
     29 class MeterValueElement;
     30 class RenderMeter;
     31 
     32 class HTMLMeterElement FINAL : public LabelableElement {
     33     DEFINE_WRAPPERTYPEINFO();
     34 public:
     35     static PassRefPtrWillBeRawPtr<HTMLMeterElement> create(Document&);
     36 
     37     enum GaugeRegion {
     38         GaugeRegionOptimum,
     39         GaugeRegionSuboptimal,
     40         GaugeRegionEvenLessGood
     41     };
     42 
     43     double value() const;
     44     void setValue(double);
     45 
     46     double min() const;
     47     void setMin(double);
     48 
     49     double max() const;
     50     void setMax(double);
     51 
     52     double low() const;
     53     void setLow(double);
     54 
     55     double high() const;
     56     void setHigh(double);
     57 
     58     double optimum() const;
     59     void setOptimum(double);
     60 
     61     double valueRatio() const;
     62     GaugeRegion gaugeRegion() const;
     63 
     64     virtual bool canContainRangeEndPoint() const OVERRIDE { return false; }
     65 
     66     virtual void trace(Visitor*) OVERRIDE;
     67 
     68 private:
     69     explicit HTMLMeterElement(Document&);
     70     virtual ~HTMLMeterElement();
     71 
     72     virtual bool areAuthorShadowsAllowed() const OVERRIDE { return false; }
     73     RenderMeter* renderMeter() const;
     74 
     75     virtual bool supportLabels() const OVERRIDE { return true; }
     76 
     77     virtual RenderObject* createRenderer(RenderStyle*) OVERRIDE;
     78     virtual void parseAttribute(const QualifiedName&, const AtomicString&) OVERRIDE;
     79 
     80     void didElementStateChange();
     81     virtual void didAddUserAgentShadowRoot(ShadowRoot&) OVERRIDE;
     82 
     83     RefPtrWillBeMember<MeterValueElement> m_value;
     84 };
     85 
     86 } // namespace blink
     87 
     88 #endif // HTMLMeterElement_h
     89