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GDI+ Plot ActiveX Control

, 5 Sep 2013
GDI+ 2D plot ActiveX control
/**************************************************************************\
*
* Copyright (c) 1998-2000, Microsoft Corp.  All Rights Reserved.
*
* Module Name:
*
*   GdiplusStringFormat.h
*
* Abstract:
*
*   String format specification for DrawString and text APIs
*
\**************************************************************************/

#ifndef _GDIPLUSSTRINGFORMAT_H
#define _GDIPLUSSTRINGFORMAT_H


class StringFormat : public GdiplusBase
{
public:
    friend class Graphics;
    friend class GraphicsPath;


    StringFormat(
        IN INT     formatFlags = 0,
        IN LANGID  language = LANG_NEUTRAL
    )
    {
        nativeFormat = NULL;
        lastError = DllExports::GdipCreateStringFormat(
            formatFlags,
            language,
            &nativeFormat
        );
    }

    static const StringFormat *GenericDefault();
    static const StringFormat *GenericTypographic();

    // Constructor based on existing string format

    StringFormat(
        IN const StringFormat *format
    )
    {
        nativeFormat = NULL;
        lastError = DllExports::GdipCloneStringFormat(
            format ? format->nativeFormat : NULL,
            &nativeFormat
        );
    }

    StringFormat *Clone() const
    {
        GpStringFormat *clonedStringFormat = NULL;

        lastError = DllExports::GdipCloneStringFormat(
            nativeFormat,
            &clonedStringFormat
        );

        if (lastError == Ok)
            return new StringFormat(clonedStringFormat, lastError);
        else
            return NULL;
    }

    ~StringFormat()
    {
        DllExports::GdipDeleteStringFormat(nativeFormat);
    }

    Status SetFormatFlags(IN INT flags)
    {
        return SetStatus(DllExports::GdipSetStringFormatFlags(
            nativeFormat,
            flags
        ));
    }

    INT GetFormatFlags() const
    {
        INT flags;
        SetStatus(DllExports::GdipGetStringFormatFlags(nativeFormat, &flags));
        return flags;
    }

#ifndef DCR_USE_NEW_152154
    Status SetLineSpacing(
        IN REAL        amount = 1.0f,
        IN LineSpacing method = LineSpacingRecommended
    )
    {
        return SetStatus(DllExports::GdipSetStringFormatLineSpacing(
            nativeFormat,
            amount,
            method
        ));
    }
#endif

    Status SetAlignment(IN StringAlignment align)
    {
        return SetStatus(DllExports::GdipSetStringFormatAlign(
            nativeFormat,
            align
        ));
    }

    StringAlignment GetAlignment() const
    {
        StringAlignment alignment;
        SetStatus(DllExports::GdipGetStringFormatAlign(
            nativeFormat,
            &alignment
        ));
        return alignment;
    }

    Status SetLineAlignment(IN StringAlignment align)
    {
        return SetStatus(DllExports::GdipSetStringFormatLineAlign(
            nativeFormat,
            align
        ));
    }

    StringAlignment GetLineAlignment() const
    {
        StringAlignment alignment;
        SetStatus(DllExports::GdipGetStringFormatLineAlign(
            nativeFormat,
            &alignment
        ));
        return alignment;
    }

    Status SetHotkeyPrefix(IN HotkeyPrefix hotkeyPrefix)
    {
        return SetStatus(DllExports::GdipSetStringFormatHotkeyPrefix(
            nativeFormat,
            (INT)hotkeyPrefix
        ));
    }

    HotkeyPrefix GetHotkeyPrefix() const
    {
        HotkeyPrefix hotkeyPrefix;
        SetStatus(DllExports::GdipGetStringFormatHotkeyPrefix(
            nativeFormat,
            (INT*)&hotkeyPrefix
        ));
        return hotkeyPrefix;
    }

    Status SetTabStops(
        IN REAL    firstTabOffset,
        IN INT     count,
        IN const REAL    *tabStops
    )
    {
        return SetStatus(DllExports::GdipSetStringFormatTabStops(
            nativeFormat,
            firstTabOffset,
            count,
            tabStops
        ));
    }

    INT GetTabStopCount() const
    {
        INT count;
        SetStatus(DllExports::GdipGetStringFormatTabStopCount(nativeFormat, &count));
        return count;
    }

    Status GetTabStops(
        IN INT     count,
        OUT REAL   *firstTabOffset,
        OUT REAL   *tabStops
    ) const
    {
        return SetStatus(DllExports::GdipGetStringFormatTabStops(
            nativeFormat,
            count,
            firstTabOffset,
            tabStops
        ));
    }

#ifdef DCR_USE_NEW_146933
    Status SetDigitSubstitution(
        IN LANGID                language,
        IN StringDigitSubstitute substitute
    )
    {
        return SetStatus(DllExports::GdipSetStringFormatDigitSubstitution(
            nativeFormat,
            language,
            substitute
        ));
    }

    LANGID GetDigitSubstitutionLanguage(
    ) const
    {
        LANGID language;
        SetStatus(DllExports::GdipGetStringFormatDigitSubstitution(
            nativeFormat,
            &language,
            NULL
        ));
        return language;
    }

    StringDigitSubstitute GetDigitSubstitutionMethod(
    ) const
    {
        StringDigitSubstitute substitute;
        SetStatus(DllExports::GdipGetStringFormatDigitSubstitution(
            nativeFormat,
            NULL,
            &substitute
        ));
        return substitute;
    }
#endif // DCR_USE_NEW_146933

    // String trimming. How to handle more text than can be displayed
    // in the limits available.

    Status SetTrimming(IN StringTrimming trimming)
    {
        return SetStatus(DllExports::GdipSetStringFormatTrimming(
            nativeFormat,
            trimming
        ));
    }

    StringTrimming StringFormat::GetTrimming() const
    {
        StringTrimming trimming;
        SetStatus(DllExports::GdipGetStringFormatTrimming(
            nativeFormat,
            &trimming
        ));
        return trimming;
    }

#ifdef DCR_USE_NEW_174340
    Status SetMeasurableCharacterRanges(
        IN INT                  rangeCount,
        IN const CharacterRange *ranges
    )
    {
        return SetStatus(DllExports::GdipSetStringFormatMeasurableCharacterRanges(
            nativeFormat,
            rangeCount,
            ranges
        ));
    }

    INT GetMeasurableCharacterRangeCount()
    {
        INT count;
        SetStatus(DllExports::GdipGetStringFormatMeasurableCharacterRangeCount(
            nativeFormat,
            &count
        ));
        return count;
    }
#endif

    // GetLastStatus - return last error code and clear error code

    Status GetLastStatus() const
    {
        Status lastStatus = lastError;
        lastError = Ok;

        return lastStatus;
    }

protected:

    Status SetStatus(GpStatus newStatus) const
    {
        if (newStatus == Ok)
        {
            return Ok;
        }
        else
        {
            return lastError = newStatus;
        }
    }


// Not allowed and move to private
    StringFormat(const StringFormat &source)
    {
        nativeFormat = NULL;
        lastError = DllExports::GdipCloneStringFormat(
            source.nativeFormat,
            &nativeFormat
        );
    }

    StringFormat& operator=(const StringFormat &source)
    {
        DllExports::GdipDeleteStringFormat(nativeFormat);
        lastError = DllExports::GdipCloneStringFormat(
            source.nativeFormat,
            &nativeFormat
        );
        return *this;
    }


    // private constructor for copy
    StringFormat(GpStringFormat * clonedStringFormat, Status status)
    {
        lastError = status;
        nativeFormat = clonedStringFormat;

    }

    GpStringFormat *nativeFormat;
    mutable Status  lastError;
};

// Generic constant string formats.

static BYTE GenericTypographicStringFormatBuffer[sizeof(StringFormat)] = {0};
static BYTE GenericDefaultStringFormatBuffer[sizeof(StringFormat)] = {0};

static StringFormat *GenericTypographicStringFormat = NULL;
static StringFormat *GenericDefaultStringFormat     = NULL;

// Define the generic string formats


inline const StringFormat *StringFormat::GenericDefault()
{
    if (GenericDefaultStringFormat != NULL)
    {
        return GenericDefaultStringFormat;
    }

    GenericDefaultStringFormat =
        (StringFormat*)GenericDefaultStringFormatBuffer;

    GenericDefaultStringFormat->lastError =
        DllExports::GdipStringFormatGetGenericDefault(
            &(GenericDefaultStringFormat->nativeFormat)
        );

    return GenericDefaultStringFormat;
}

inline const StringFormat *StringFormat::GenericTypographic()
{
    if (GenericTypographicStringFormat != NULL)
    {
        return GenericTypographicStringFormat;
    }

    GenericTypographicStringFormat =
        (StringFormat*)GenericTypographicStringFormatBuffer;

    GenericTypographicStringFormat->lastError =
        DllExports::GdipStringFormatGetGenericTypographic(
            &GenericTypographicStringFormat->nativeFormat
        );

    return GenericTypographicStringFormat;
}

#endif // !_GDIPLUSSTRINGFORMAT_H

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License

This article, along with any associated source code and files, is licensed under The GNU Lesser General Public License (LGPLv3)

About the Author

Leslie Zhai
Engineer
China China
An individual human existence should be like a river - small at first, narrowly contained within its banks, and rushing passionately past boulders and over waterfalls. Gradually the river grows wider, the banks recede, the waters flow more quietly, and in the end, without any visible break, they become merged in the sea, and painlessly lose their individual being.
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