make a PercentFieldWrap that wraps a MetricField

rather than inheriting from one, which means
we don't need yet-another-custom-widget

Change-Id: Iddaeedfe45fb06ee72e59143974c9a4d0d2478f6

sw/source/ui/inc/prcntfld.hxx

@@ -21,6 +21,74 @@
 
 #include <vcl/field.hxx>
 #include "swdllapi.h"
+#include "uitool.hxx"
+
+//Wraps a MetricField with extra features, preferred to PercentField
+class SW_DLLPUBLIC PercentFieldWrap
+{
+    MetricField* m_pField;
+
+    sal_Int64   nRefValue;      // 100% value for conversion (in Twips)
+    sal_Int64   nOldMax;
+    sal_Int64   nOldMin;
+    sal_Int64   nOldSpinSize;
+    sal_Int64   nOldBaseValue;
+    sal_Int64   nLastPercent;
+    sal_Int64   nLastValue;
+    sal_uInt16  nOldDigits;
+    FieldUnit   eOldUnit;
+    bool bLockAutoCalculation; //prevent recalcution of percent values when the
+                               //reference value is changed
+
+    SW_DLLPRIVATE sal_Int64      ImpPower10(sal_uInt16 n);
+
+public:
+
+    PercentFieldWrap();
+    void set(MetricField *pField);
+    void SetUpHdl(const Link& rLink) { m_pField->SetUpHdl(rLink); }
+    void SetDownHdl(const Link& rLink) { m_pField->SetDownHdl(rLink); }
+    void SetLoseFocusHdl(const Link& rLink) { m_pField->SetLoseFocusHdl(rLink); }
+    void SetMetric(FieldUnit eUnit) { ::SetMetric(*m_pField, eUnit); }
+    void Enable(bool bEnable = true, bool bChild = true) { m_pField->Enable(bEnable, bChild); }
+    void SetAccessibleName(const OUString& rName) { m_pField->SetAccessibleName(rName); }
+    void SetText(const OUString& rStr) { m_pField->SetText(rStr); }
+    void SetMetricFieldMin(sal_Int64 nNewMin) { m_pField->SetMin(nNewMin); }
+    void SetMetricFieldMax(sal_Int64 nNewMax) { m_pField->SetMax(nNewMax); }
+
+    void SetValue(sal_Int64 nNewValue, FieldUnit eInUnit = FUNIT_NONE);
+
+    void SetPrcntValue(sal_Int64 nNewValue, FieldUnit eInUnit = FUNIT_NONE);
+
+    void SetUserValue(sal_Int64 nNewValue, FieldUnit eInUnit = FUNIT_NONE);
+
+    void SetBaseValue(sal_Int64 nNewValue, FieldUnit eInUnit = FUNIT_NONE);
+
+    sal_Int64 GetValue(FieldUnit eOutUnit = FUNIT_NONE);
+
+    bool IsValueModified();
+
+    void SetMax(sal_Int64 nNewMax, FieldUnit eInUnit = FUNIT_NONE);
+
+    void SetMin(sal_Int64 nNewMin, FieldUnit eInUnit = FUNIT_NONE);
+
+    sal_Int64 NormalizePercent(sal_Int64 nValue);
+    sal_Int64 DenormalizePercent(sal_Int64 nValue);
+
+    void SetRefValue(sal_Int64 nValue);
+    sal_Int64 GetRefValue() const { return nRefValue; }
+    sal_Int64 GetRealValue(FieldUnit eOutUnit = FUNIT_NONE);
+
+    sal_Int64 Convert(sal_Int64 nValue, FieldUnit eInUnit, FieldUnit eOutUnit);
+
+    void ShowPercent(bool bPercent);
+
+    sal_uInt16 GetOldDigits() const {return nOldDigits;}
+
+    void LockAutoCalculation(bool bLock) {bLockAutoCalculation = bLock;}
+    bool IsAutoCalculationLocked() const {return bLockAutoCalculation;}
+};
+
 
 class SW_DLLPUBLIC PercentField : public MetricField
 {

sw/source/ui/utlui/prcntfld.cxx

@@ -37,6 +37,25 @@ PercentField::PercentField( Window* pWin, const ResId& rResId ) :
     SetCustomUnitText(rtl::OUString('%'));
 }
 
+PercentFieldWrap::PercentFieldWrap()
+    : nOldMax(0)
+    , nOldMin(0)
+    , nLastPercent(-1)
+    , nLastValue(-1)
+    , eOldUnit(FUNIT_NONE)
+    , bLockAutoCalculation(sal_False)
+{
+}
+
+void PercentFieldWrap::set(MetricField *pField)
+{
+    m_pField = pField;
+    nOldSpinSize = m_pField->GetSpinSize();
+    nRefValue = DenormalizePercent(m_pField->GetMax(FUNIT_TWIP));
+    nOldDigits = m_pField->GetDecimalDigits();
+    m_pField->SetCustomUnitText(rtl::OUString('%'));
+}
+
 void PercentField::SetRefValue(sal_Int64 nValue)
 {
     sal_Int64 nRealValue = GetRealValue(eOldUnit);
@@ -47,6 +66,16 @@ void PercentField::SetRefValue(sal_Int64 nValue)
         SetPrcntValue(nRealValue, eOldUnit);
 }
 
+void PercentFieldWrap::SetRefValue(sal_Int64 nValue)
+{
+    sal_Int64 nRealValue = GetRealValue(eOldUnit);
+
+    nRefValue = nValue;
+
+    if (!bLockAutoCalculation && (m_pField->GetUnit() == FUNIT_CUSTOM))
+        SetPrcntValue(nRealValue, eOldUnit);
+}
+
 void PercentField::ShowPercent(sal_Bool bPercent)
 {
     if ((bPercent && GetUnit() == FUNIT_CUSTOM) ||
@@ -113,6 +142,72 @@ void PercentField::ShowPercent(sal_Bool bPercent)
     }
 }
 
+void PercentFieldWrap::ShowPercent(bool bPercent)
+{
+    if ((bPercent && m_pField->GetUnit() == FUNIT_CUSTOM) ||
+        (!bPercent && m_pField->GetUnit() != FUNIT_CUSTOM))
+        return;
+
+    sal_Int64 nOldValue;
+
+    if (bPercent)
+    {
+        sal_Int64 nAktWidth, nPercent;
+
+        nOldValue = GetValue();
+
+        eOldUnit = m_pField->GetUnit();
+        nOldDigits = m_pField->GetDecimalDigits();
+        nOldMin = m_pField->GetMin();
+        nOldMax = m_pField->GetMax();
+        nOldSpinSize = m_pField->GetSpinSize();
+        nOldBaseValue = m_pField->GetBaseValue();
+        m_pField->SetUnit(FUNIT_CUSTOM);
+        m_pField->SetDecimalDigits( 0 );
+
+        nAktWidth = m_pField->ConvertValue(nOldMin, 0, nOldDigits, eOldUnit, FUNIT_TWIP);
+        // round to 0.5 percent
+        nPercent = ((nAktWidth * 10) / nRefValue + 5) / 10;
+
+        m_pField->SetMin(Max(static_cast< sal_Int64 >(1), nPercent));
+        m_pField->SetMax(100);
+        m_pField->SetSpinSize(5);
+        m_pField->SetBaseValue(0);
+        if (nOldValue != nLastValue)
+        {
+            nAktWidth = m_pField->ConvertValue(nOldValue, 0, nOldDigits, eOldUnit, FUNIT_TWIP);
+            nPercent = ((nAktWidth * 10) / nRefValue + 5) / 10;
+            m_pField->SetValue(nPercent);
+            nLastPercent = nPercent;
+            nLastValue = nOldValue;
+        }
+        else
+            m_pField->SetValue(nLastPercent);
+    }
+    else
+    {
+        sal_Int64 nOldPercent = GetValue(FUNIT_CUSTOM);
+
+        nOldValue = Convert(GetValue(), m_pField->GetUnit(), eOldUnit);
+
+        m_pField->SetUnit(eOldUnit);
+        m_pField->SetDecimalDigits(nOldDigits);
+        m_pField->SetMin(nOldMin);
+        m_pField->SetMax(nOldMax);
+        m_pField->SetSpinSize(nOldSpinSize);
+        m_pField->SetBaseValue(nOldBaseValue);
+
+        if (nOldPercent != nLastPercent)
+        {
+            SetPrcntValue(nOldValue, eOldUnit);
+            nLastPercent = nOldPercent;
+            nLastValue = nOldValue;
+        }
+        else
+            SetPrcntValue(nLastValue, eOldUnit);
+    }
+}
+
 void PercentField::SetValue(sal_Int64 nNewValue, FieldUnit eInUnit)
 {
    MetricFormatter::SetValue(nNewValue, eInUnit);
@@ -141,6 +236,28 @@ void PercentField::SetPrcntValue(sal_Int64 nNewValue, FieldUnit eInUnit)
     }
 }
 
+void PercentFieldWrap::SetPrcntValue(sal_Int64 nNewValue, FieldUnit eInUnit)
+{
+    if (m_pField->GetUnit() != FUNIT_CUSTOM || eInUnit == FUNIT_CUSTOM)
+        m_pField->SetValue(Convert(nNewValue, eInUnit, m_pField->GetUnit()));
+    else
+    {
+        // Ausgangswert ueberschreiben, nicht spaeter restaurieren
+        sal_Int64 nPercent, nAktWidth;
+        if(eInUnit == FUNIT_TWIP)
+        {
+            nAktWidth = m_pField->ConvertValue(nNewValue, 0, nOldDigits, FUNIT_TWIP, FUNIT_TWIP);
+        }
+        else
+        {
+            sal_Int64 nValue = Convert(nNewValue, eInUnit, eOldUnit);
+            nAktWidth = m_pField->ConvertValue(nValue, 0, nOldDigits, eOldUnit, FUNIT_TWIP);
+        }
+        nPercent = ((nAktWidth * 10) / nRefValue + 5) / 10;
+        m_pField->SetValue(nPercent);
+    }
+}
+
 void PercentField::SetUserValue( sal_Int64 nNewValue, FieldUnit eInUnit )
 {
     if (GetUnit() != FUNIT_CUSTOM || eInUnit == FUNIT_CUSTOM)
@@ -178,6 +295,11 @@ sal_Int64 PercentField::GetValue( FieldUnit eOutUnit )
     return Convert(MetricField::GetValue(), GetUnit(), eOutUnit);
 }
 
+sal_Int64 PercentFieldWrap::GetValue(FieldUnit eOutUnit)
+{
+    return Convert(m_pField->GetValue(), m_pField->GetUnit(), eOutUnit);
+}
+
 void PercentField::SetMin(sal_Int64 nNewMin, FieldUnit eInUnit)
 {
     if (GetUnit() != FUNIT_CUSTOM)
@@ -193,6 +315,21 @@ void PercentField::SetMin(sal_Int64 nNewMin, FieldUnit eInUnit)
     }
 }
 
+void PercentFieldWrap::SetMin(sal_Int64 nNewMin, FieldUnit eInUnit)
+{
+    if (m_pField->GetUnit() != FUNIT_CUSTOM)
+        m_pField->SetMin(nNewMin, eInUnit);
+    else
+    {
+        if (eInUnit == FUNIT_NONE)
+            eInUnit = eOldUnit;
+        nOldMin = Convert(nNewMin, eInUnit, eOldUnit);
+
+        sal_Int64 nPercent = Convert(nNewMin, eInUnit, FUNIT_CUSTOM);
+        m_pField->SetMin(Max( static_cast< sal_Int64 >(1), nPercent));
+    }
+}
+
 void PercentField::SetMax(sal_Int64 nNewMax, FieldUnit eInUnit)
 {
     if (GetUnit() != FUNIT_CUSTOM)
@@ -204,6 +341,17 @@ void PercentField::SetMax(sal_Int64 nNewMax, FieldUnit eInUnit)
     }
 }
 
+void PercentFieldWrap::SetMax(sal_Int64 nNewMax, FieldUnit eInUnit)
+{
+    if (m_pField->GetUnit() != FUNIT_CUSTOM)
+        m_pField->SetMax(nNewMax, eInUnit);
+    else
+    {
+        if (eInUnit == FUNIT_NONE)
+            eInUnit = eOldUnit;
+    }
+}
+
 sal_Int64 PercentField::NormalizePercent(sal_Int64 nValue)
 {
     if (GetUnit() != FUNIT_CUSTOM)
@@ -214,6 +362,15 @@ sal_Int64 PercentField::NormalizePercent(sal_Int64 nValue)
     return nValue;
 }
 
+sal_Int64 PercentFieldWrap::NormalizePercent(sal_Int64 nValue)
+{
+    if (m_pField->GetUnit() != FUNIT_CUSTOM)
+        nValue = m_pField->Normalize(nValue);
+    else
+        nValue = nValue * ImpPower10(nOldDigits);
+    return nValue;
+}
+
 sal_Int64 PercentField::DenormalizePercent(sal_Int64 nValue)
 {
     if (GetUnit() != FUNIT_CUSTOM)
@@ -227,6 +384,18 @@ sal_Int64 PercentField::DenormalizePercent(sal_Int64 nValue)
     return nValue;
 }
 
+sal_Int64 PercentFieldWrap::DenormalizePercent(sal_Int64 nValue)
+{
+    if (m_pField->GetUnit() != FUNIT_CUSTOM)
+        nValue = m_pField->Denormalize(nValue);
+    else
+    {
+        sal_Int64 nFactor = ImpPower10(nOldDigits);
+        nValue = ((nValue+(nFactor/2)) / nFactor);
+    }
+    return nValue;
+}
+
 sal_Bool PercentField::IsValueModified()
 {
     if (GetUnit() == FUNIT_CUSTOM)
@@ -246,6 +415,16 @@ sal_Int64 PercentField::ImpPower10( sal_uInt16 n )
     return nValue;
 }
 
+sal_Int64 PercentFieldWrap::ImpPower10(sal_uInt16 n)
+{
+    sal_Int64 nValue = 1;
+
+    for (sal_uInt16 i=0; i < n; ++i)
+        nValue *= 10;
+
+    return nValue;
+}
+
 sal_Int64 PercentField::GetRealValue(FieldUnit eOutUnit)
 {
     if (GetUnit() != FUNIT_CUSTOM)
@@ -254,6 +433,14 @@ sal_Int64 PercentField::GetRealValue(FieldUnit eOutUnit)
         return Convert(GetValue(), GetUnit(), eOutUnit);
 }
 
+sal_Int64 PercentFieldWrap::GetRealValue(FieldUnit eOutUnit)
+{
+    if (m_pField->GetUnit() != FUNIT_CUSTOM)
+        return GetValue(eOutUnit);
+    else
+        return Convert(GetValue(), m_pField->GetUnit(), eOutUnit);
+}
+
 sal_Int64 PercentField::Convert(sal_Int64 nValue, FieldUnit eInUnit, FieldUnit eOutUnit)
 {
     if (eInUnit == eOutUnit ||
@@ -289,5 +476,41 @@ sal_Int64 PercentField::Convert(sal_Int64 nValue, FieldUnit eInUnit, FieldUnit e
     return ConvertValue(nValue, 0, nOldDigits, eInUnit, eOutUnit);
 }
 
+sal_Int64 PercentFieldWrap::Convert(sal_Int64 nValue, FieldUnit eInUnit, FieldUnit eOutUnit)
+{
+    if (eInUnit == eOutUnit ||
+        (eInUnit == FUNIT_NONE && eOutUnit == m_pField->GetUnit()) ||
+        (eOutUnit == FUNIT_NONE && eInUnit == m_pField->GetUnit()))
+        return nValue;
+
+    if (eInUnit == FUNIT_CUSTOM)
+    {
+        // Umrechnen in Metrik
+        sal_Int64 nTwipValue = (nRefValue * nValue + 50) / 100;
+
+        if (eOutUnit == FUNIT_TWIP) // Nur wandeln, wenn unbedingt notwendig
+            return NormalizePercent(nTwipValue);
+        else
+            return m_pField->ConvertValue(NormalizePercent(nTwipValue), 0, nOldDigits, FUNIT_TWIP, eOutUnit);
+    }
+
+    if (eOutUnit == FUNIT_CUSTOM)
+    {
+        // Umrechnen in Prozent
+        sal_Int64 nAktWidth;
+        nValue = DenormalizePercent(nValue);
+
+        if (eInUnit == FUNIT_TWIP)  // Nur wandeln, wenn unbedingt notwendig
+            nAktWidth = nValue;
+        else
+            nAktWidth = m_pField->ConvertValue(nValue, 0, nOldDigits, eInUnit, FUNIT_TWIP);
+        // Round to 0.5 percent
+        return ((nAktWidth * 1000) / nRefValue + 5) / 10;
+    }
+
+    return m_pField->ConvertValue(nValue, 0, nOldDigits, eInUnit, eOutUnit);
+}
+
+
 
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