QtDesignStudio Gradient Picker Dialog Patch

Patch for Qt versions below 5.12

Change-Id: I7be4c6287a671faf4fda7865e752494cf038318f
Reviewed-by: Thomas Hartmann <thomas.hartmann@qt.io>

src/plugins/qmldesigner/components/propertyeditor/gradientmodel.cpp

@@ -507,7 +507,8 @@ void GradientModel::setGradientProperty(const QString &propertyName, qreal value
 
 void GradientModel::setPresetByID(int presetID)
 {
-    const QGradient gradient(static_cast<QGradient::Preset>(presetID));
+    const QGradient gradient(GradientPresetItem::createGradientFromPreset(
+        static_cast<GradientPresetItem::Preset>(presetID)));
     const QList<QGradientStop> gradientStops = gradient.stops().toList();
 
     QList<qreal> stopsPositions;

src/plugins/qmldesigner/components/propertyeditor/gradientpresetcustomlistmodel.cpp

@@ -24,8 +24,8 @@
 ****************************************************************************/
 
 #include "gradientpresetcustomlistmodel.h"
-
 #include "gradientpresetitem.h"
+
 #include <coreplugin/icore.h>
 #include <utils/qtcassert.h>
 #include <utils/algorithm.h>

src/plugins/qmldesigner/components/propertyeditor/gradientpresetdefaultlistmodel.cpp

@@ -24,15 +24,13 @@
 ****************************************************************************/
 
 #include "gradientpresetdefaultlistmodel.h"
+#include "gradientpresetitem.h"
 
 #include <QHash>
 #include <QByteArray>
 #include <QDebug>
-
 #include <QFile>
 
-#include "gradientpresetitem.h"
-
 GradientPresetDefaultListModel::GradientPresetDefaultListModel(QObject *parent)
     : GradientPresetListModel(parent)
 {
@@ -54,7 +52,10 @@ void GradientPresetDefaultListModel::addAllPresets()
     const QMetaObject &metaObj = QGradient::staticMetaObject;
     const QMetaEnum metaEnum = metaObj.enumerator(metaObj.indexOfEnumerator("Preset"));
 
+    if (!metaEnum.isValid())
+        return;
+
     for (int i = 0; i < metaEnum.keyCount(); i++) {
-        addItem(GradientPresetItem(QGradient::Preset(metaEnum.value(i))));
+        addItem(GradientPresetItem(GradientPresetItem::Preset(metaEnum.value(i))));
     }
 }

src/plugins/qmldesigner/components/propertyeditor/gradientpresetdefaultlistmodel.h

@@ -25,12 +25,11 @@
 
 #pragma once
 
+#include "gradientpresetlistmodel.h"
+
 #include <QObject>
 #include <QAbstractListModel>
 #include <QtQml/qqml.h>
-#include <memory>
-
-#include "gradientpresetlistmodel.h"
 
 class GradientPresetDefaultListModel : public GradientPresetListModel
 {

src/plugins/qmldesigner/components/propertyeditor/gradientpresetitem.cpp

@@ -36,19 +36,19 @@
 
 
 GradientPresetItem::GradientPresetItem()
-    : m_gradientVal(QGradient::Preset(0))
-    , m_gradientID(QGradient::Preset(0))
+    : m_gradientVal(QGradient())
+    , m_gradientID(Preset(0))
     , m_presetName(QString())
 {}
 
 GradientPresetItem::GradientPresetItem(const QGradient &value, const QString &name)
     : m_gradientVal(value)
-    , m_gradientID(QGradient::Preset(0))
+    , m_gradientID(Preset(0))
     , m_presetName(name)
 {}
 
-GradientPresetItem::GradientPresetItem(const QGradient::Preset value)
-    : m_gradientVal(QGradient::Preset(value))
+GradientPresetItem::GradientPresetItem(const Preset value)
+    : m_gradientVal(createGradientFromPreset(value))
     , m_gradientID(value)
     , m_presetName(getNameByPreset(value))
 {}
@@ -63,9 +63,6 @@ QVariant GradientPresetItem::getProperty(GradientPresetItem::Property id) const
     case objectNameRole:
         out.setValue(QString());
         break;
-    case presetRole:
-        out.setValue(preset());
-        break;
     case stopsPosListRole:
         out.setValue(stopsPosList());
         break;
@@ -94,22 +91,17 @@ QGradient GradientPresetItem::gradientVal() const
     return m_gradientVal;
 }
 
-QGradient::Preset GradientPresetItem::preset() const
-{
-    return m_gradientID;
-}
-
 void GradientPresetItem::setGradient(const QGradient &value)
 {
     m_gradientVal = value;
-    m_gradientID = QGradient::Preset(0);
+    m_gradientID = Preset(0);
     m_presetName = QString();
 }
 
-void GradientPresetItem::setGradient(const QGradient::Preset value)
+void GradientPresetItem::setGradient(const Preset value)
 {
     m_gradientID = value;
-    m_gradientVal = QGradient(value);
+    m_gradientVal = createGradientFromPreset(value);
     m_presetName = getNameByPreset(value);
 }
 
@@ -153,11 +145,14 @@ int GradientPresetItem::presetID() const
     return static_cast<int>(m_gradientID);
 }
 
-QString GradientPresetItem::getNameByPreset(QGradient::Preset value)
+QString GradientPresetItem::getNameByPreset(Preset value)
 {
     const QMetaObject &metaObj = QGradient::staticMetaObject;
     const QMetaEnum metaEnum = metaObj.enumerator(metaObj.indexOfEnumerator("Preset"));
 
+    if (!metaEnum.isValid())
+        return QString("Custom");
+
     QString enumName = QString::fromUtf8(metaEnum.valueToKey(static_cast<int>(value)));
 
     const QStringList sl = enumName.split(QRegExp("(?=[A-Z])"), QString::SkipEmptyParts);
@@ -166,7 +161,17 @@ QString GradientPresetItem::getNameByPreset(QGradient::Preset value)
     std::for_each(sl.begin(), sl.end(), [&enumName](const QString &s) { enumName += (s + " "); });
     enumName.chop(1); //let's remove the last empty space
 
-    return (enumName.isEmpty() ? "Custom" : enumName);
+    return (enumName.isEmpty() ? QString("Custom") : enumName);
+}
+
+QGradient GradientPresetItem::createGradientFromPreset(Preset value)
+{
+#if QT_VERSION >= QT_VERSION_CHECK(5, 12, 0)
+    return QGradient(value);
+#else
+    Q_UNUSED(value);
+    return {};
+#endif
 }
 
 QDebug &operator<<(QDebug &stream, const GradientPresetItem &gradient)
@@ -194,7 +199,7 @@ QDataStream &operator>>(QDataStream &stream, GradientPresetItem &gradient)
 
     int gradientID;
     stream >> gradientID;
-    gradient.m_gradientID = static_cast<QGradient::Preset>(gradientID);
+    gradient.m_gradientID = static_cast<GradientPresetItem::Preset>(gradientID);
 
     stream >> gradient.m_presetName;
     return stream;

src/plugins/qmldesigner/components/propertyeditor/gradientpresetitem.h

@@ -23,6 +23,8 @@
 **
 ****************************************************************************/
 
+#pragma once
+
 #include <QObject>
 #include <QGradient>
 
@@ -30,7 +32,6 @@ class GradientPresetItem
 {
     Q_GADGET
 
-    Q_PROPERTY(QGradient::Preset preset READ preset FINAL)
     Q_PROPERTY(QList<qreal> stopsPosList READ stopsPosList FINAL)
     Q_PROPERTY(QList<QString> stopsColorList READ stopsColorList FINAL)
     Q_PROPERTY(int stopListSize READ stopListSize FINAL)
@@ -38,28 +39,32 @@ class GradientPresetItem
     Q_PROPERTY(int presetID READ presetID FINAL)
 
 public:
+#if QT_VERSION >= QT_VERSION_CHECK(5, 12, 0)
+    using Preset = QGradient::Preset;
+#else
+    enum Preset {};
+#endif
+
     explicit GradientPresetItem();
     explicit GradientPresetItem(const QGradient &value, const QString &name = QString());
-    explicit GradientPresetItem(const QGradient::Preset number);
+    explicit GradientPresetItem(const Preset number);
     ~GradientPresetItem();
 
     enum Property {
         objectNameRole = 0,
-        presetRole = 1,
-        stopsPosListRole = 2,
-        stopsColorListRole = 3,
-        stopListSizeRole = 4,
-        presetNameRole = 5,
-        presetIDRole = 6
+        stopsPosListRole = 1,
+        stopsColorListRole = 2,
+        stopListSizeRole = 3,
+        presetNameRole = 4,
+        presetIDRole = 5
     };
 
     QVariant getProperty(Property id) const;
 
     QGradient gradientVal() const;
-    QGradient::Preset preset() const;
 
     void setGradient(const QGradient &value);
-    void setGradient(const QGradient::Preset value);
+    void setGradient(const Preset value);
 
     QList<qreal> stopsPosList() const;
     QList<QString> stopsColorList() const;
@@ -69,16 +74,18 @@ public:
     QString presetName() const;
     int presetID() const;
 
-    static QString getNameByPreset(QGradient::Preset value);
+    static QString getNameByPreset(Preset value);
 
     friend QDebug &operator<<(QDebug &stream, const GradientPresetItem &gradient);
 
     friend QDataStream &operator<<(QDataStream &stream, const GradientPresetItem &gradient);
     friend QDataStream &operator>>(QDataStream &stream, GradientPresetItem &gradient);
 
+    static QGradient createGradientFromPreset(Preset value);
+
 private:
     QGradient m_gradientVal;
-    QGradient::Preset m_gradientID;
+    Preset m_gradientID;
     QString m_presetName;
 };
 

src/plugins/qmldesigner/components/propertyeditor/gradientpresetlistmodel.cpp

@@ -24,7 +24,6 @@
 ****************************************************************************/
 
 #include "gradientpresetlistmodel.h"
-
 #include "gradientpresetitem.h"
 
 #include <QHash>
@@ -37,7 +36,6 @@ GradientPresetListModel::GradientPresetListModel(QObject *parent)
 {
     m_roleNames
         = {{static_cast<int>(GradientPresetItem::Property::objectNameRole), "objectName"},
-           {static_cast<int>(GradientPresetItem::Property::presetRole), "preset"},
            {static_cast<int>(GradientPresetItem::Property::stopsPosListRole), "stopsPosList"},
            {static_cast<int>(GradientPresetItem::Property::stopsColorListRole), "stopsColorList"},
            {static_cast<int>(GradientPresetItem::Property::stopListSizeRole), "stopListSize"},
@@ -103,7 +101,7 @@ const QList<GradientPresetItem> &GradientPresetListModel::items() const
 void GradientPresetListModel::sortItems()
 {
     auto itemSort = [](const GradientPresetItem &first, const GradientPresetItem &second) {
-        return (static_cast<int>(first.preset()) < static_cast<int>(second.preset()));
+        return (static_cast<int>(first.presetID()) < static_cast<int>(second.presetID()));
     };
 
     std::sort(m_items.begin(), m_items.end(), itemSort);

src/plugins/qmldesigner/components/propertyeditor/gradientpresetlistmodel.h

@@ -28,7 +28,6 @@
 #include <QObject>
 #include <QAbstractListModel>
 #include <QtQml/qqml.h>
-#include <memory>
 
 class GradientPresetItem;