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lang: ja-jp
breaks: true
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# Crystal Reports で印刷すると 用紙サイズに合わせて意図せず縮小される場合の設定 2021-10-14

## レジストリを変更する

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\SAP BusinessObjects\Crystal Reports for .NET Framework 4.0\Crystal Reports\DesignerOptions]
"DealWithMinimalMarginsWhenPrinting"="0"

[HKEY_LOCAL_MACHINE\SOFTWARE\SAP BusinessObjects\Crystal Reports for .NET Framework 4.0\Crystal Reports\DesignerOptions]
"DealWithMinimalMarginsWhenPrinting"="0"

## 内部の処理を確認

`iLSpy`より。

### PrintingHelper.DealWithMinimalMarginsWhenPrinting()

private static bool DealWithMinimalMarginsWhenPrinting()
{
    bool result = true;
    string name = ReportingVersion.CRYSTAL_REGISTRY_PATH + "\\Crystal Reports\\DesignerOptions";
    RegistryKey registryKey = Registry.LocalMachine.OpenSubKey(name);
    if (registryKey != null)
    {
        object value = registryKey.GetValue("DealWithMinimalMarginsWhenPrinting");
        if (value is string text && text != "1")
        {
            result = false;
        }
    }
    return result;
}

:::info
レジストリの設定を0にすると、上記メソッドが`false`を返す。レジストリ未設定の場合は、`true`を返す。
:::

### PrintingHelper.CalculatePrintLayout()

private static bool CalculatePrintLayout(
    TwipSize physicalSize, 
    PageMargins minMargins, 
    TwipSize logicalSize, 
    PageMargins reportMargins, 
    PrintLayoutSettings layoutSettings, 
    out double scalingFactor, 
    out int offsetX, 
    out int offsetY
    )
{
    scalingFactor = 1.0;
    offsetX = 0;
    offsetY = 0;
    bool flag = NeedToAdjustPageSize(layoutSettings, logicalSize, physicalSize);
    bool flag2 = false;
    if (flag)
    {
        scalingFactor = CalculateScalingFactor(physicalSize, logicalSize);
    }
    if (layoutSettings.Centered)
    {
        TwipSize twipSize = new TwipSize((int)((double)logicalSize.Width * scalingFactor), (int)((double)logicalSize.Height * scalingFactor));
        offsetX = (int)((double)((physicalSize.Width - twipSize.Width) / 2) / scalingFactor);
        offsetY = (int)((double)((physicalSize.Height - twipSize.Height) / 2) / scalingFactor);
    }
    PageMargins pageMargins = new PageMargins(reportMargins.leftMargin + offsetX, reportMargins.topMargin + offsetY, reportMargins.rightMargin + offsetX, reportMargins.bottomMargin + offsetY);
    PageMargins pageMargins2 = new PageMargins((int)((double)pageMargins.leftMargin * scalingFactor), (int)((double)pageMargins.topMargin * scalingFactor), (int)((double)pageMargins.rightMargin * scalingFactor), (int)((double)pageMargins.bottomMargin * scalingFactor));
    PageMargins empty = PageMargins.Empty;
    if (DealWithMinimalMarginsWhenPrinting())
    {
        empty = new PageMargins(
            Math.Max(pageMargins2.leftMargin, minMargins.leftMargin), 
            Math.Max(pageMargins2.topMargin, minMargins.topMargin), 
            Math.Max(pageMargins2.rightMargin, minMargins.rightMargin), 
            Math.Max(pageMargins2.bottomMargin, minMargins.bottomMargin)
            );
        if (empty != pageMargins2)
        {
            flag2 = DealWithMinimalMargins(
                physicalSize, 
                minMargins, 
                logicalSize, 
                reportMargins, 
                ref scalingFactor, 
                out offsetX, 
                out offsetY, 
                out empty
                );
        }
    }
    else
    {
        empty = pageMargins;
    }
    offsetX = (int)((double)(empty.leftMargin - minMargins.leftMargin) / scalingFactor);
    offsetY = (int)((double)(empty.topMargin - minMargins.topMargin) / scalingFactor);
    return flag || flag2;
}

:::info
`DealWithMinimalMarginsWhenPrinting()`が`true`を返す場合にのみ、マージンを調整していることがうかがえる。
:::

###### tags: `Crystal Reports` `縮小` `レジストリ` `DealWithMinimalMarginsWhenPrinting` `用紙サイズ`