From 2a67480b6cc7f3b14cfe0d38582d342cdcf6219d 2012-10-09 13:23:28
From: Michal Klocek <Michal.Klocek@digia.com>
Date: 2012-10-09 13:23:28
Subject: [PATCH] Reimplement zoom/scroll hanling for barcategoryaxis Y

---

diff --git a/demos/chartviewer/charts/charts.pri b/demos/chartviewer/charts/charts.pri
index 226dbad..bf03b62 100644
--- a/demos/chartviewer/charts/charts.pri
+++ b/demos/chartviewer/charts/charts.pri
@@ -20,6 +20,12 @@ SOURCES += \
     axis/barcategoryaxisy.cpp \
     axis/datetimeaxisx.cpp \
     axis/datetimeaxisy.cpp \
+    axis/valueaxis2.cpp \
+    axis/categoryaxis2.cpp \
+    axis/barcategoryaxisx2.cpp \
+    axis/barcategoryaxisy2.cpp \
+    axis/datetimeaxisx2.cpp \
+    axis/datetimeaxisy2.cpp \
     multiaxis/multivalueaxis.cpp \
     multiaxis/multivalueaxis2.cpp \
     multiaxis/multivalueaxis3.cpp \
diff --git a/src/axis/barcategoryaxis/chartbarcategoryaxisx.cpp b/src/axis/barcategoryaxis/chartbarcategoryaxisx.cpp
index dd098cb..3498230 100644
--- a/src/axis/barcategoryaxis/chartbarcategoryaxisx.cpp
+++ b/src/axis/barcategoryaxis/chartbarcategoryaxisx.cpp
@@ -41,27 +41,22 @@ ChartBarCategoryAxisX::~ChartBarCategoryAxisX()
 QVector<qreal> ChartBarCategoryAxisX::calculateLayout() const
 {
     QVector<qreal> points;
-
     const QRectF& gridRect = gridGeometry();
     qreal range = max() - min();
-
     const qreal delta = gridRect.width()/range;
 
     if(delta<2) return points;
 
     qreal offset =-min()-0.5;
-
     offset = int(offset * delta)%int(delta);
 
     int count = qFloor(range);
-
     if(count < 1 ) return points;
 
     points.resize(count+2);
 
     for (int i = 0; i < count+2; ++i) {
-        qreal x = offset + i * delta + gridRect.left();
-        points[i] = x;
+        points[i] = offset + i * delta + gridRect.left();
     }
 
     return points;
@@ -71,8 +66,8 @@ QStringList ChartBarCategoryAxisX::createCategoryLabels(const QVector<qreal>& la
 {
     QStringList result ;
     const QRectF &gridRect = gridGeometry();
-
     qreal d = (max() - min()) / gridRect.width();
+
     for (int i = 0; i < layout.count() - 1; ++i) {
         qreal x = qFloor((((layout[i] + layout[i + 1]) / 2 - gridRect.left()) * d + min() + 0.5));
         if ((x < m_categoriesAxis->categories().count()) && (x >= 0)) {
diff --git a/src/axis/barcategoryaxis/chartbarcategoryaxisy.cpp b/src/axis/barcategoryaxis/chartbarcategoryaxisy.cpp
index ee0a4f8..e611fe3 100644
--- a/src/axis/barcategoryaxis/chartbarcategoryaxisy.cpp
+++ b/src/axis/barcategoryaxis/chartbarcategoryaxisy.cpp
@@ -39,30 +39,25 @@ ChartBarCategoryAxisY::~ChartBarCategoryAxisY()
 
 QVector<qreal> ChartBarCategoryAxisY::calculateLayout() const
 {
-    int count = m_categoriesAxis->d_ptr->count();
-
-    Q_ASSERT(count >= 1);
-
     QVector<qreal> points;
-    points.resize(count + 2);
+    const QRectF& gridRect = gridGeometry();
+    qreal range = max() - min();
+    const qreal delta = gridRect.height()/range;
 
-    const QRectF &gridRect = gridGeometry();
+    if(delta<2) return points;
 
-    const qreal delta = gridRect.height() / (count);
     qreal offset = - min() - 0.5;
+    offset = int(offset * delta)%int(delta);
 
-    if (delta < 1)
-        return points;
+    int count = qFloor(range);
+    if(count < 1 ) return points;
 
-    if (offset < 0)
-        offset = int(offset * gridRect.height() / (max() - min())) % int(delta) + delta;
-    else
-        offset = int(offset * gridRect.height() / (max() - min())) % int(delta);
+    points.resize(count+2);
 
-    for (int i = -1; i < count + 1; ++i) {
-        int y = gridRect.bottom() - i * delta - offset;
-        points[i + 1] = y;
+    for (int i = 0; i < count+2; ++i) {
+        points[i] =  gridRect.bottom() - i * delta -offset;
     }
+
     return points;
 }
 
@@ -71,6 +66,7 @@ QStringList ChartBarCategoryAxisY::createCategoryLabels(const QVector<qreal>& la
     QStringList result;
     const QRectF &gridRect = gridGeometry();
     qreal d = (max() - min()) / gridRect.height();
+
     for (int i = 0; i < layout.count() - 1; ++i) {
         qreal x = qFloor(((gridRect.height() - (layout[i + 1] + layout[i]) / 2 + gridRect.top()) * d + min() + 0.5));
         if ((x < m_categoriesAxis->categories().count()) && (x >= 0)) {
diff --git a/src/axis/horizontalaxis.cpp b/src/axis/horizontalaxis.cpp
index 66bfa21..2be7569 100644
--- a/src/axis/horizontalaxis.cpp
+++ b/src/axis/horizontalaxis.cpp
@@ -82,10 +82,10 @@ void HorizontalAxis::updateGeometry()
             //wrapping in case of interval axis
             const qreal delta = layout[i+1] - layout[i];
             QString text = labelList.at(i);
-            if (fn.boundingRect(text).width() > delta )
+            if (fn.boundingRect(text).width() + 1 > delta )
             {
                 QString label = text + "...";
-                while (fn.boundingRect(label).width() > delta && label.length() > 3)
+                while (fn.boundingRect(label).width() >= delta && label.length() > 3)
                 label.remove(label.length() - 4, 1);
                 labelItem->setText(label);
             }
@@ -117,12 +117,11 @@ void HorizontalAxis::updateGeometry()
         }
 
         //label overlap detection
-        if(labelItem->pos().x() <= width ||
+        if(labelItem->pos().x() < width ||
             labelItem->pos().x() < axisRect.left() ||
             labelItem->pos().x() + rect.width() > axisRect.right()) {
             labelItem->setVisible(false);
-        }
-        else {
+        } else {
             labelItem->setVisible(true);
             width=rect.width()+labelItem->pos().x();
         }