1 files changed, 120 insertions, 0 deletions
diff --git a/sc/source/ui/StatisticsDialogs/ExponentialSmoothingDialog.cxx b/sc/source/ui/StatisticsDialogs/ExponentialSmoothingDialog.cxx
new file mode 100644
index 000000000..8e87c11fb
--- /dev/null
+++ b/sc/source/ui/StatisticsDialogs/ExponentialSmoothingDialog.cxx
@@ -0,0 +1,120 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ */
+
+#include <memory>
+
+#include <reffact.hxx>
+#include <TableFillingAndNavigationTools.hxx>
+#include <ExponentialSmoothingDialog.hxx>
+#include <scresid.hxx>
+#include <strings.hrc>
+
+ScExponentialSmoothingDialog::ScExponentialSmoothingDialog(
+                    SfxBindings* pSfxBindings, SfxChildWindow* pChildWindow,
+                    weld::Window* pParent, ScViewData* pViewData )
+    : ScStatisticsInputOutputDialog(
+            pSfxBindings, pChildWindow, pParent, pViewData,
+            "modules/scalc/ui/exponentialsmoothingdialog.ui",
+            "ExponentialSmoothingDialog")
+    , mxSmoothingFactor(m_xBuilder->weld_spin_button("smoothing-factor-spin"))
+{
+}
+
+ScExponentialSmoothingDialog::~ScExponentialSmoothingDialog()
+{
+}
+
+void ScExponentialSmoothingDialog::Close()
+{
+    DoClose( ScExponentialSmoothingDialogWrapper::GetChildWindowId() );
+}
+
+const char* ScExponentialSmoothingDialog::GetUndoNameId()
+{
+    return STR_EXPONENTIAL_SMOOTHING_UNDO_NAME;
+}
+
+ScRange ScExponentialSmoothingDialog::ApplyOutput(ScDocShell* pDocShell)
+{
+    AddressWalkerWriter output(mOutputAddress, pDocShell, &mDocument,
+            formula::FormulaGrammar::mergeToGrammar( formula::FormulaGrammar::GRAM_ENGLISH, mAddressDetails.eConv));
+    FormulaTemplate aTemplate(&mDocument);
+
+    // Smoothing factor
+    double aSmoothingFactor = mxSmoothingFactor->get_value() / 100.0;
+
+    // Alpha
+    output.writeBoldString(ScResId(STR_LABEL_ALPHA));
+    output.nextRow();
+
+    // Alpha Value
+    ScAddress aSmoothingFactorAddress = output.current();
+    output.writeValue(aSmoothingFactor);
+    output.nextRow();
+
+    // Exponential Smoothing
+    output.push();
+
+    std::unique_ptr<DataRangeIterator> pIterator;
+    if (mGroupedBy == BY_COLUMN)
+        pIterator.reset(new DataRangeByColumnIterator(mInputRange));
+    else
+        pIterator.reset(new DataRangeByRowIterator(mInputRange));
+
+    for( ; pIterator->hasNext(); pIterator->next() )
+    {
+        output.resetRow();
+
+        ScRange aCurrentRange = pIterator->get();
+
+        // Write column label
+        if (mGroupedBy == BY_COLUMN)
+            aTemplate.setTemplate(ScResId(STR_COLUMN_LABEL_TEMPLATE));
+        else
+            aTemplate.setTemplate(ScResId(STR_ROW_LABEL_TEMPLATE));
+        aTemplate.applyNumber("%NUMBER%", pIterator->index() + 1);
+        output.writeBoldString(aTemplate.getTemplate());
+        output.nextRow();
+
+        // Initial value
+        if ((false))
+        {
+            aTemplate.setTemplate("=AVERAGE(%RANGE%)");
+            aTemplate.applyRange("%RANGE%", aCurrentRange);
+            output.writeFormula(aTemplate.getTemplate());
+        }
+        else
+        {
+            aTemplate.setTemplate("=%VAR%");
+            aTemplate.applyAddress("%VAR%", aCurrentRange.aStart);
+            output.writeFormula(aTemplate.getTemplate());
+        }
+
+        output.nextRow();
+
+        DataCellIterator aDataCellIterator = pIterator->iterateCells();
+
+        for (; aDataCellIterator.hasNext(); aDataCellIterator.next())
+        {
+            aTemplate.setTemplate("=%VALUE% * %PREVIOUS_INPUT% + (1 - %VALUE%) * %PREVIOUS_OUTPUT%");
+            aTemplate.applyAddress("%PREVIOUS_INPUT%",  aDataCellIterator.get());
+            aTemplate.applyAddress("%PREVIOUS_OUTPUT%", output.current(0, -1));
+            aTemplate.applyAddress("%VALUE%",           aSmoothingFactorAddress);
+
+            output.writeFormula(aTemplate.getTemplate());
+            output.nextRow();
+        }
+        output.nextColumn();
+    }
+
+    return ScRange (output.mMinimumAddress, output.mMaximumAddress);
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */