Add checkboxes to resource downloader (#3516)

launcher/ui/widgets/ProjectItem.cpp

@@ -1,9 +1,11 @@
 #include "ProjectItem.h"
 
-#include "Common.h"
+#include <QApplication>
 
+#include <QDebug>
 #include <QIcon>
 #include <QPainter>
+#include "Common.h"
 
 ProjectItemDelegate::ProjectItemDelegate(QWidget* parent) : QStyledItemDelegate(parent) {}
 
@@ -14,13 +16,20 @@ void ProjectItemDelegate::paint(QPainter* painter, const QStyleOptionViewItem& o
     QStyleOptionViewItem opt(option);
     initStyleOption(&opt, index);
 
+    const QStyle* style = opt.widget == nullptr ? QApplication::style() : opt.widget->style();
+
     auto rect = opt.rect;
 
-    if (opt.state & QStyle::State_Selected) {
-        painter->fillRect(rect, opt.palette.highlight());
+    style->drawPrimitive(QStyle::PE_PanelItemViewItem, &opt, painter, opt.widget);
+
+    if (option.state & QStyle::State_Selected && style->objectName() != "windowsvista")
         painter->setPen(opt.palette.highlightedText().color());
-    } else if (opt.state & QStyle::State_MouseOver) {
-        painter->fillRect(rect, opt.palette.window());
+
+    if (opt.features & QStyleOptionViewItem::HasCheckIndicator) {
+        QStyleOptionViewItem checkboxOpt = makeCheckboxStyleOption(opt, style);
+        style->drawPrimitive(QStyle::PE_IndicatorItemViewItemCheck, &checkboxOpt, painter, opt.widget);
+
+        rect.setX(checkboxOpt.rect.right());
     }
 
     // The default icon size will be a square (and height is usually the lower value).
@@ -42,6 +51,9 @@ void ProjectItemDelegate::paint(QPainter* painter, const QStyleOptionViewItem& o
         int x = rect.x() + icon_x_margin;
         int y = rect.y() + icon_y_margin;
 
+        if (opt.features & QStyleOptionViewItem::HasCheckIndicator)
+            rect.translate(icon_x_margin / 2, 0);
+
         // Prevent 'scaling null pixmap' warnings
         if (icon_width > 0 && icon_height > 0)
             opt.icon.paint(painter, x, y, icon_width, icon_height);
@@ -56,26 +68,12 @@ void ProjectItemDelegate::paint(QPainter* painter, const QStyleOptionViewItem& o
     {  // Title painting
         auto title = index.data(UserDataTypes::TITLE).toString();
 
+        if (index.data(UserDataTypes::INSTALLED).toBool())
+            title = tr("%1 [installed]").arg(title);
+
         painter->save();
 
         auto font = opt.font;
-        if (index.data(UserDataTypes::SELECTED).toBool()) {
-            // Set nice font
-            font.setBold(true);
-            font.setUnderline(true);
-        }
-        if (index.data(UserDataTypes::INSTALLED).toBool()) {
-            auto hRect = opt.rect;
-            hRect.setX(hRect.x() + 1);
-            hRect.setY(hRect.y() + 1);
-            hRect.setHeight(hRect.height() - 2);
-            hRect.setWidth(hRect.width() - 2);
-            // Set nice font
-            font.setItalic(true);
-            font.setOverline(true);
-            painter->drawRect(hRect);
-        }
-
         font.setPointSize(font.pointSize() + 2);
         painter->setFont(font);
 
@@ -132,3 +130,56 @@ void ProjectItemDelegate::paint(QPainter* painter, const QStyleOptionViewItem& o
 
     painter->restore();
 }
+
+bool ProjectItemDelegate::editorEvent(QEvent* event,
+                                      QAbstractItemModel* model,
+                                      const QStyleOptionViewItem& option,
+                                      const QModelIndex& index)
+{
+    if (!(event->type() == QEvent::MouseButtonRelease || event->type() == QEvent::MouseButtonPress ||
+          event->type() == QEvent::MouseButtonDblClick))
+        return false;
+
+    auto mouseEvent = (QMouseEvent*)event;
+
+    if (mouseEvent->button() != Qt::LeftButton)
+        return false;
+
+    QStyleOptionViewItem opt(option);
+    initStyleOption(&opt, index);
+
+    const QStyle* style = opt.widget == nullptr ? QApplication::style() : opt.widget->style();
+
+    const QStyleOptionViewItem checkboxOpt = makeCheckboxStyleOption(opt, style);
+
+    if (!checkboxOpt.rect.contains(mouseEvent->x(), mouseEvent->y()))
+        return false;
+
+    // swallow other events
+    // (prevents item being selected or double click action triggering)
+    if (event->type() != QEvent::MouseButtonRelease)
+        return true;
+
+    emit checkboxClicked(index);
+    return true;
+}
+
+QStyleOptionViewItem ProjectItemDelegate::makeCheckboxStyleOption(const QStyleOptionViewItem& opt, const QStyle* style) const
+{
+    QStyleOptionViewItem checkboxOpt = opt;
+
+    checkboxOpt.state &= ~QStyle::State_HasFocus;
+
+    if (checkboxOpt.checkState == Qt::Checked)
+        checkboxOpt.state |= QStyle::State_On;
+    else
+        checkboxOpt.state |= QStyle::State_Off;
+
+    QRect checkboxRect = style->subElementRect(QStyle::SE_ItemViewItemCheckIndicator, &checkboxOpt, opt.widget);
+    // 5px is the typical top margin for image
+    // we don't want the checkboxes to be all over the place :)
+    checkboxOpt.rect = QRect(opt.rect.x() + 5, opt.rect.y() + (opt.rect.height() / 2 - checkboxRect.height() / 2), checkboxRect.width(),
+                             checkboxRect.height());
+
+    return checkboxOpt;
+}

launcher/ui/widgets/ProjectItem.h

@@ -6,8 +6,7 @@
 enum UserDataTypes {
     TITLE = 257,        // QString
     DESCRIPTION = 258,  // QString
-    SELECTED = 259,     // bool
-    INSTALLED = 260     // bool
+    INSTALLED = 259     // bool
 };
 
 /** This is an item delegate composed of:
@@ -22,4 +21,12 @@ class ProjectItemDelegate final : public QStyledItemDelegate {
     ProjectItemDelegate(QWidget* parent);
 
     void paint(QPainter*, const QStyleOptionViewItem&, const QModelIndex&) const override;
+
+    bool editorEvent(QEvent* event, QAbstractItemModel* model, const QStyleOptionViewItem& option, const QModelIndex& index) override;
+
+   signals:
+    void checkboxClicked(const QModelIndex& index);
+
+   private:
+    QStyleOptionViewItem makeCheckboxStyleOption(const QStyleOptionViewItem& opt, const QStyle* style) const;
 };