1 // NumericValControl.h 2 // * PURPOSE 3 // Extends ValControl to provide the basis for a variety 4 // of numeric UI controls. 5 // * HISTORY 6 // e.moon 18sep99 General cleanup; values are now stored 7 // in fixed-point form only. 8 // e.moon 17jan99 Begun 9 // +++++ 31jan99: negatives are still handled wrong... 10 // 11 // CLASS: NumericValControl 12 #ifndef NUMERIC_VAL_CONTROL_H 13 #define NUMERIC_VAL_CONTROL_H 14 15 #include "cortex_defs.h" 16 #include "ValControl.h" 17 18 #include <MediaDefs.h> 19 20 21 class BContinuousParameter; 22 23 24 __BEGIN_CORTEX_NAMESPACE 25 26 class ValControlDigitSegment; 27 28 29 class NumericValControl : public ValControl { 30 public: 31 typedef ValControl _inherited; 32 33 public: 34 35 // +++++ need control over number of segments +++++ 36 37 // parameter-linked ctor 38 NumericValControl(BRect frame, const char* name, BContinuousParameter* param, 39 uint16 wholeDigits, uint16 fractionalDigits = 0, align_mode alignMode = ALIGN_FLUSH_RIGHT, 40 align_flags alignFlags = ALIGN_NONE); 41 42 // 'plain' ctor 43 NumericValControl(BRect frame, const char* name, BMessage* message, uint16 wholeDigits, 44 uint16 fractionalDigits = 0, bool negativeVisible = true, 45 align_mode alignMode = ALIGN_FLUSH_RIGHT, align_flags alignFlags = ALIGN_NONE); 46 47 ~NumericValControl(); 48 49 BContinuousParameter* param() const; 50 // bound parameter, or 0 if none 51 52 void getConstraints(double* outMinValue, double* outMaxValue); 53 // value constraints (by default, the min/max allowed by the ctor 54 // settings: wholeDigits, fractionalDigits, and negativeVisible) 55 56 status_t setConstraints(double minValue, double maxValue); 57 // the current value is not yet re-constrained by this call 58 59 double value() const; 60 // fetches the current value (calculated on the spot from each 61 // segment.) 62 63 void setValue(double value, bool setParam = false); 64 // set the displayed value (and, if setParam is true, the 65 // linked parameter.) The value will be constrained if necessary. 66 67 public: // segment interface 68 // 18sep99: old segment interface 69 // virtual void offsetValue(double dfDelta); 70 71 // 18sep99: new segment interface. 'offset' is given 72 // in the segment's units. 73 74 virtual void offsetSegmentValue(ValControlDigitSegment* segment, int64 offset); 75 76 public: 77 virtual void mediaParameterChanged(); 78 79 virtual void updateParameter(double value); 80 // writes the stored value to the bound parameter 81 82 virtual void initSegments(); 83 virtual void initConstraintsFromParam(); 84 85 public: // ValControl impl. 86 void setValue(const void* data, size_t size); //nyi 87 88 void getValue(void* data, size_t* ioSize); //nyi 89 90 // string value access 91 virtual status_t setValueFrom(const char* text); 92 virtual status_t getString(BString& buffer); 93 94 public: 95 virtual void MessageReceived(BMessage* message); 96 97 protected: // internal operations 98 virtual void _SetDefaultConstraints(bool negativeVisible); 99 100 private: 101 int64 _ValueFixed() const; //nyi 102 // calculates the current value as an int64 103 104 void _SetValueFixed(int64 fixed); //nyi 105 // sets the value of each segment based on an int64 value; 106 // does not constrain the value 107 108 protected: 109 // double m_dfValue; removed 18sep99 110 111 BContinuousParameter* fParam; 112 // bound parameter 113 114 uint16 fWholeDigits; 115 uint16 fFractionalDigits; 116 117 // constraints 118 int64 fMinFixed; 119 int64 fMaxFixed; 120 121 122 }; 123 124 __END_CORTEX_NAMESPACE 125 #endif /* NUMERIC_VAL_CONTROL_H */ 126