新增SpkIconButton为主题和按钮工作减负

inc/spkiconbutton.h

@@ -0,0 +1,30 @@
+#ifndef SPKICONBUTTON_H
+#define SPKICONBUTTON_H
+
+#include <QPushButton>
+#include "spkui_general.h"
+
+class SpkIconButton : public QPushButton
+{
+    Q_OBJECT
+
+  public:
+    SpkIconButton(QWidget *parent = nullptr);
+    ~SpkIconButton() {};
+
+    void SetIcon(QIcon, QSize);
+    void SetIcon(QPixmap);
+    void SetIconSize(QSize);
+
+  protected:
+    void paintEvent(QPaintEvent *) override;
+
+  private:
+    static enum { Dark, Light } sCurrentTheme;
+    QPixmap mPmapPaintedIcon;
+    QSize mPmapSize;
+
+    static constexpr int IconMargin = 8; // shall we make it changable?
+};
+
+#endif // SPKICONBUTTON_H