File 0001-Revert-Chart-Depend-on-KChart-2.7.0.patch of Package calligra

From 239b0429f5c2e0535416652c8e061377fab76248 Mon Sep 17 00:00:00 2001
From: Wolfgang Bauer <wbauer@tmo.at>
Date: Thu, 30 Apr 2020 09:30:08 +0200
Subject: [PATCH] Revert "Chart: Depend on KChart 2.7.0"

Allow to build calligra's chartshape with KChart/kdiagram 2.6.x again,
which is the version we have in Leap 15.1.
Except for one bugfix that needs the newer KChart version
(https://bugs.kde.org/420145), this should make no difference.

This reverts commit 2269397a6fa5f2ec4c94be8f50dc5c09d02f02ca.
---
 CMakeLists.txt                  |  2 +-
 plugins/chartshape/Axis.cpp     |  2 ++
 plugins/chartshape/Legend.cpp   | 32 ++++++++++++++++++++++++++++++++
 plugins/chartshape/PlotArea.cpp |  3 +++
 4 files changed, 38 insertions(+), 1 deletion(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 8d6bed795fa..5cc1dfd2f71 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -454,7 +454,7 @@ set_package_properties(KF5Akonadi PROPERTIES
 ##
 ## Test for KChart
 ##
-macro_optional_find_package(KChart 2.7.0 QUIET)
+macro_optional_find_package(KChart 2.6.0 QUIET)
 set_package_properties(KChart PROPERTIES
     DESCRIPTION "Library for creating business charts (part of KDiagram)"
     URL "https://www.kde.org/"
diff --git a/plugins/chartshape/Axis.cpp b/plugins/chartshape/Axis.cpp
index dd98dfb59d4..c4ca7e9e1cc 100644
--- a/plugins/chartshape/Axis.cpp
+++ b/plugins/chartshape/Axis.cpp
@@ -260,7 +260,9 @@ Axis::Private::Private(Axis *axis, AxisDimension dim)
 
     KChart::RulerAttributes attr = kdAxis->rulerAttributes();
     attr.setShowRulerLine(true);
+#if KCHART_VERSION >= ((2<<16)|(6<<8)|(89))
     attr.setRulerLinePen(QPen());
+#endif
     kdAxis->setRulerAttributes(attr);
 }
 
diff --git a/plugins/chartshape/Legend.cpp b/plugins/chartshape/Legend.cpp
index 092d2808805..a4794248fc8 100644
--- a/plugins/chartshape/Legend.cpp
+++ b/plugins/chartshape/Legend.cpp
@@ -352,6 +352,7 @@ void Legend::paint(QPainter &painter, const KoViewConverter &converter, KoShapeP
         background()->paint(painter, converter, paintContext, p);
     }
 
+#if KCHART_VERSION >= ((2<<16)|(6<<8)|(89))
     disconnect (d->kdLegend, SIGNAL(propertiesChanged()), this, SLOT(slotKdLegendChanged()));
 
     // KChart thinks in pixels, Calligra in pt
@@ -362,6 +363,37 @@ void Legend::paint(QPainter &painter, const KoViewConverter &converter, KoShapeP
     d->kdLegend->paint(&painter, rect);
 
     connect (d->kdLegend, SIGNAL(propertiesChanged()), this, SLOT(slotKdLegendChanged()));
+#else
+    // KChart thinks in pixels, Calligra in pt
+    // KChart also for non-QWidget painting devices cares for the logicalDpi
+    // Other than PlotArea we do not control the output size via the paint method,
+    // so here have to resize the legend temporarily.
+    // Printing should only result in 1 paint call, so this should not happen too often.
+    // TODO: something in KChart seems broken in general on printer output, also seen in kchart examples
+    // so legend in print is still broken :/
+    const QSize sizePx = d->kdLegend->size();
+    const QSize newSizePx = ScreenConversions::scaleFromPtToPx(size(), painter);
+    const bool isPainterDifferentDpi = (sizePx != newSizePx);
+    if (isPainterDifferentDpi) {
+        // temporarily set a size matching the painterdevice
+        d->kdLegend->resize(newSizePx);
+        d->kdLegend->resizeLayout(newSizePx);
+    }
+
+    ScreenConversions::scaleFromPtToPx(painter);
+
+    d->kdLegend->paint(&painter);
+
+    if (isPainterDifferentDpi) {
+        // restore screen-dpi size
+        d->kdLegend->resize(sizePx);
+        d->kdLegend->resizeLayout(sizePx);
+    }
+
+    //painter.restore();
+    // Paint the cached pixmap
+    //painter.drawImage(0, 0, d->image);
+#endif
 }
 
 
diff --git a/plugins/chartshape/PlotArea.cpp b/plugins/chartshape/PlotArea.cpp
index 55aca8bb217..dbeccd48d9f 100644
--- a/plugins/chartshape/PlotArea.cpp
+++ b/plugins/chartshape/PlotArea.cpp
@@ -1313,6 +1313,9 @@ void PlotArea::paint(QPainter& painter, const KoViewConverter& converter, KoShap
     // is not not cut off.
     painter.setClipping(false);
     if (kdchartRect.width() > 10 && kdchartRect.height() > 10) {
+#if KCHART_VERSION < 0x020689
+            painter.setPen(QPen()); // ruler line needs a pen to be shown
+#endif
         d->kdChart->paint(&painter, kdchartRect);
     }
     //painter.restore();
-- 
2.16.4