use nullptr consistently (clang-tidy)

From now on we prefer nullptr instead of 0 to clarify cases where
we are assigning or testing a pointer rather than a numeric zero.

Also, replaced cases where 0 was passed as Qt::KeyboardModifiers
with Qt::NoModifier (clang-tidy replaced them with nullptr, which
waas wrong, so it was just as well to make the tests more readable
rather than to revert those lines).

Change-Id: I4735d35e4d9f42db5216862ce091429eadc6e65d
Reviewed-by: Simon Hausmann <simon.hausmann@qt.io>

4 files changed, 6 insertions, 6 deletions

diff --git a/src/imports/shapes/plugin.cpp b/src/imports/shapes/plugin.cpp
index 74731aa35f..f0e66479b6 100644
--- a/src/imports/shapes/plugin.cpp
+++ b/src/imports/shapes/plugin.cpp
@@ -58,7 +58,7 @@ class QmlShapesPlugin : public QQmlExtensionPlugin
     Q_PLUGIN_METADATA(IID QQmlExtensionInterface_iid)
 
 public:
-    QmlShapesPlugin(QObject *parent = 0) : QQmlExtensionPlugin(parent) { initResources(); }
+    QmlShapesPlugin(QObject *parent = nullptr) : QQmlExtensionPlugin(parent) { initResources(); }
     void registerTypes(const char *uri) override
     {
         Q_ASSERT(QByteArray(uri) == QByteArray("QtQuick.Shapes"));
diff --git a/src/imports/shapes/qquickshapegenericrenderer.cpp b/src/imports/shapes/qquickshapegenericrenderer.cpp
index 8131f02f1a..411252a906 100644
--- a/src/imports/shapes/qquickshapegenericrenderer.cpp
+++ b/src/imports/shapes/qquickshapegenericrenderer.cpp
@@ -448,14 +448,14 @@ void QQuickShapeGenericRenderer::triangulateStroke(const QPainterPath &path,
     stroker.setInvScale(inverseScale);
 
     if (pen.style() == Qt::SolidLine) {
-        stroker.process(vp, pen, clip, 0);
+        stroker.process(vp, pen, clip, nullptr);
     } else {
         QDashedStrokeProcessor dashStroker;
         dashStroker.setInvScale(inverseScale);
-        dashStroker.process(vp, pen, clip, 0);
+        dashStroker.process(vp, pen, clip, nullptr);
         QVectorPath dashStroke(dashStroker.points(), dashStroker.elementCount(),
                                dashStroker.elementTypes(), 0);
-        stroker.process(dashStroke, pen, clip, 0);
+        stroker.process(dashStroke, pen, clip, nullptr);
     }
 
     if (!stroker.vertexCount()) {
diff --git a/src/imports/shapes/qquickshapenvprrenderer.cpp b/src/imports/shapes/qquickshapenvprrenderer.cpp
index 88f367fe70..51af0d8961 100644
--- a/src/imports/shapes/qquickshapenvprrenderer.cpp
+++ b/src/imports/shapes/qquickshapenvprrenderer.cpp
@@ -986,7 +986,7 @@ void QQuickNvprBlitter::texturedQuad(GLuint textureId, const QSize &size,
 
     m_program->enableAttributeArray(0);
     m_program->enableAttributeArray(1);
-    f->glVertexAttribPointer(0, 2, GL_FLOAT, GL_FALSE, 4 * sizeof(GLfloat), 0);
+    f->glVertexAttribPointer(0, 2, GL_FLOAT, GL_FALSE, 4 * sizeof(GLfloat), nullptr);
     f->glVertexAttribPointer(1, 2, GL_FLOAT, GL_FALSE, 4 * sizeof(GLfloat), (const void *) (2 * sizeof(GLfloat)));
 
     f->glBindTexture(GL_TEXTURE_2D, textureId);
diff --git a/src/imports/shapes/qquickshapesoftwarerenderer.cpp b/src/imports/shapes/qquickshapesoftwarerenderer.cpp
index ed13afbc7e..0f5c3604b5 100644
--- a/src/imports/shapes/qquickshapesoftwarerenderer.cpp
+++ b/src/imports/shapes/qquickshapesoftwarerenderer.cpp
@@ -266,7 +266,7 @@ void QQuickShapeSoftwareRenderNode::render(const RenderState *state)
 
 QSGRenderNode::StateFlags QQuickShapeSoftwareRenderNode::changedStates() const
 {
-    return 0;
+    return nullptr;
 }
 
 QSGRenderNode::RenderingFlags QQuickShapeSoftwareRenderNode::flags() const