使主题色依照DDE主题色改变

因为AUTOMOC不会在编译主程序的时候再对插件接口类进行MOC，所以需要在主程序内加一份一模一样的插件接口类定义。

plugin/dtkplugin/spkdtkplugin.cpp

@@ -1,11 +1,25 @@
 #include <DGuiApplicationHelper>
 #include <DPlatformWindowHandle>
+#include <DPlatformTheme>
 #include "spkdtkplugin_impl.h"
 
 using Dtk::Widget::DPlatformWindowHandle;
 
+void SpkDtkPluginImpl::Initialize()
+{
+  connect(DGuiApplicationHelper::instance()->systemTheme(),
+          &DPlatformTheme::activeColorChanged,
+          this,
+          &SpkDtkPluginImpl::AccentColorChanged);
+}
+
 void SpkDtkPluginImpl::addWindow(QWidget *w, QObject *parent)
 {
   DPlatformWindowHandle *h = new DPlatformWindowHandle(w, parent);
   Q_UNUSED(h);
 }
+
+QColor SpkDtkPluginImpl::GetAccentColor()
+{
+  return DGuiApplicationHelper::instance()->systemTheme()->activeColor();
+}

plugin/dtkplugin/spkdtkplugin.h

@@ -3,12 +3,17 @@
 
 #include <QWidget>
 
-class SpkDtkPlugin
+class SpkDtkPlugin : public QObject
 {
+    Q_OBJECT
   public:
     virtual ~SpkDtkPlugin() = default;
-
+    virtual void Initialize() = 0;
     virtual void addWindow(QWidget* w, QObject* parent) = 0;
+    virtual QColor GetAccentColor() = 0;
+
+  signals:
+    void AccentColorChanged(QColor);
 };
 QT_BEGIN_NAMESPACE
 Q_DECLARE_INTERFACE(SpkDtkPlugin, "org.spark-store.client.dtkplugin")

plugin/dtkplugin/spkdtkplugin_impl.h

@@ -5,7 +5,7 @@
 #include <QtPlugin>
 #include "spkdtkplugin.h"
 
-class SpkDtkPluginImpl : public QObject, SpkDtkPlugin
+class SpkDtkPluginImpl : public SpkDtkPlugin
 {
   Q_OBJECT
   Q_PLUGIN_METADATA(IID "org.spark-store.client.dtkplugin")
@@ -13,4 +13,6 @@ class SpkDtkPluginImpl : public QObject, SpkDtkPlugin
 
   public:
     void addWindow(QWidget* w, QObject* parent) override;
+    void Initialize() override;
+    QColor GetAccentColor() override;
 };