Loading and unloading of plugins at runtime

4 files changed, 65 insertions, 23 deletions

diff --git a/lib/about/aboutplugin.cpp b/lib/about/aboutplugin.cpp
index 7df75fa..b2fab51 100644
--- a/lib/about/aboutplugin.cpp
+++ b/lib/about/aboutplugin.cpp
@@ -54,19 +54,43 @@ QTreeWidgetItem *createItem(const QString &key, const QJsonValue &json, QTreeWid
     return item;
 }
 
-AboutPluginDialog::AboutPluginDialog(const QPluginLoader *loader, QWidget *parent)
+AboutPluginDialog::AboutPluginDialog(QPluginLoader *loader, QWidget *parent)
     : QDialog(parent)
     , ui(new Ui::AboutPluginDialog)
 {
     setAttribute(Qt::WA_DeleteOnClose, true);
     ui->setupUi(this);
 
+    // load button icon
+    {
+        QIcon load_icon;
+        load_icon.addPixmap(style()->standardPixmap(QStyle::SP_MediaPlay), QIcon::Normal, QIcon::On);
+        load_icon.addPixmap(style()->standardPixmap(QStyle::SP_MediaStop), QIcon::Normal, QIcon::Off);
+        ui->load->setIcon(load_icon);
+    }
+
     auto metaData = loader->metaData()["MetaData"].toObject();
 
     this->setWindowTitle(metaData["name"].toString());
 
     ui->path->setText(loader->fileName());
-    ui->loaded->setChecked(loader->isLoaded());
+    ui->load->setChecked(loader->isLoaded());
+
+    connect(ui->load, &QToolButton::clicked, this, [this, loader](bool checked) {
+        if(checked) {
+            // load plugin
+            if(!loader->load()) {
+                ui->load->setChecked(false);
+                ui->error->setText(loader->errorString());
+            }
+        } else {
+            // unload plugin
+            if(!loader->unload()) {
+                ui->load->setChecked(true);
+                ui->error->setText(loader->errorString());
+            }
+        }
+    });
 
     ui->name->setText(metaData[QLatin1Literal("name")].toString());
     ui->author->setText(metaData[QLatin1Literal("author")].toString());
diff --git a/lib/about/aboutplugin.h b/lib/about/aboutplugin.h
index adab215..9651060 100644
--- a/lib/about/aboutplugin.h
+++ b/lib/about/aboutplugin.h
@@ -21,7 +21,7 @@ class AboutPluginDialog : public QDialog
     Q_OBJECT
 
 public:
-    explicit AboutPluginDialog(const QPluginLoader *loader, QWidget *parent = nullptr);
+    explicit AboutPluginDialog(QPluginLoader *loader, QWidget *parent = nullptr);
     ~AboutPluginDialog() override;
 
 private:
diff --git a/lib/about/aboutplugin.ui b/lib/about/aboutplugin.ui
index f2d4848..31e20c6 100644
--- a/lib/about/aboutplugin.ui
+++ b/lib/about/aboutplugin.ui
@@ -67,21 +67,7 @@
         </widget>
        </item>
        <item row="4" column="1">
-        <layout class="QHBoxLayout" name="controls_layout">
-         <item>
-          <widget class="QPushButton" name="loaded">
-           <property name="enabled">
-            <bool>false</bool>
-           </property>
-           <property name="text">
-            <string>Load</string>
-           </property>
-           <property name="checkable">
-            <bool>true</bool>
-           </property>
-          </widget>
-         </item>
-        </layout>
+        <layout class="QHBoxLayout" name="controls_layout"/>
        </item>
        <item row="2" column="1">
         <widget class="QLabel" name="license">
@@ -127,6 +113,37 @@
        </item>
       </layout>
      </widget>
+     <widget class="QWidget" name="controls_tab">
+      <attribute name="title">
+       <string>Controls</string>
+      </attribute>
+      <layout class="QFormLayout" name="formLayout_2">
+       <item row="0" column="1">
+        <widget class="QToolButton" name="load">
+         <property name="text">
+          <string>Load</string>
+         </property>
+         <property name="checkable">
+          <bool>true</bool>
+         </property>
+        </widget>
+       </item>
+       <item row="1" column="1">
+        <widget class="QLabel" name="error">
+         <property name="text">
+          <string/>
+         </property>
+        </widget>
+       </item>
+       <item row="0" column="0">
+        <widget class="QLabel" name="error_label">
+         <property name="text">
+          <string>Status</string>
+         </property>
+        </widget>
+       </item>
+      </layout>
+     </widget>
     </widget>
    </item>
    <item>
diff --git a/src/browser.cpp b/src/browser.cpp
index cc5d565..4547e08 100644
--- a/src/browser.cpp
+++ b/src/browser.cpp
@@ -243,9 +243,6 @@ MainWindow *Browser::createWindow()
     });
 
     for(QPluginLoader *loader : qAsConst(m_plugins)) {
-        const auto *plugin = qobject_cast<PluginInterface *>(loader->instance());
-        Q_CHECK_PTR(plugin);
-
         auto *pluginMenu = window->ui->menuTools->addMenu(loader->metaData().value("MetaData").toObject().value("name").toString());
 
         auto *aboutAction = pluginMenu->addAction(tr("About"));
@@ -257,8 +254,12 @@ MainWindow *Browser::createWindow()
         auto *runAction = pluginMenu->addAction(tr("Run"));
         runAction->setShortcut(QKeySequence::fromString(loader->metaData().value("MetaData").toObject().value("shortcut").toString()));
 
-        connect(runAction, &QAction::triggered, window, [=]() {
-            plugin->createWidget(window)->exec();
+        connect(runAction, &QAction::triggered, window, [loader, window]() {
+            if(loader->isLoaded()) {
+                const auto *interface = qobject_cast<PluginInterface *>(loader->instance());
+                Q_CHECK_PTR(interface);
+                interface->createWidget(window)->exec();
+            }
         });
     }