fix: improve onboard plugin icon handling

1. Replaced custom OnboardItem with CommonIconButton for consistent
icon behavior
2. Simplified icon loading logic by removing redundant fallback checks
3. Added proper QIcon and QLogging includes
4. Removed obsolete OnboardItem class files
5. Improved icon fallback mechanism in CommonIconButton

fix: 改进屏幕键盘插件图标处理

1. 使用 CommonIconButton 替代自定义的 OnboardItem 以获得一致的图标行为
2. 通过移除冗余的回退检查简化了图标加载逻辑
3. 添加了适当的 QIcon 和 QLogging 头文件包含
4. 移除了过时的 OnboardItem 类文件
5 改进了 CommonIconButton 中的图标回退机制

Author: mhduiy

plugins/dde-dock/common/commoniconbutton.cpp

@@ -133,7 +133,12 @@ void CommonIconButton::setIcon(const QString &icon, const QString &fallback, con
         addDarkMark(tmp);
         addDarkMark(tmpFallback);
     }
-    m_icon = QIcon::fromTheme(tmp, QIcon::fromTheme(tmpFallback));
+    m_icon = QIcon::fromTheme(tmp);
+
+    if (m_icon.isNull()) {
+        m_icon = QIcon::fromTheme(tmpFallback);
+    }
+
     if (m_icon.isNull()) {
         QString defaultIcon = m_fileMapping[State::Default].first;
         m_icon = QIcon::fromTheme(defaultIcon);

plugins/dde-dock/onboard/icon/dcc-onboard.dci

@@ -15,7 +15,7 @@ OnboardPlugin::OnboardPlugin(QObject *parent)
     : QObject(parent)
     , m_pluginLoaded(false)
     , m_startupState(false)
-    , m_onboardItem(nullptr)
+    , m_onboardIcon(nullptr)
     , m_tipsLabel(new TipsWidget)
     , m_quickPanel(new QuickPanel)
 {
@@ -47,7 +47,7 @@ QWidget *OnboardPlugin::itemWidget(const QString &itemKey)
         return m_quickPanel.data();
     }
 
-    return m_onboardItem.data();
+    return m_onboardIcon.data();
 }
 
 QWidget *OnboardPlugin::itemTipsWidget(const QString &itemKey)
@@ -151,7 +151,7 @@ void OnboardPlugin::displayModeChanged(const Dock::DisplayMode displayMode)
     Q_UNUSED(displayMode);
 
     if (!pluginIsDisable()) {
-        m_onboardItem->update();
+        m_onboardIcon->update();
     }
 }
 
@@ -180,7 +180,9 @@ void OnboardPlugin::loadPlugin()
 
     m_pluginLoaded = true;
 
-    m_onboardItem.reset(new OnboardItem);
+    m_onboardIcon.reset(new CommonIconButton);
+    m_onboardIcon->setFixedSize(Dock::DOCK_PLUGIN_ITEM_FIXED_SIZE);
+    m_onboardIcon->setIcon(":/icons/icon/keyboard-symbolic.svg");
 
     m_proxyInter->itemAdded(this, pluginName());
     displayModeChanged(displayMode());

plugins/dde-dock/onboard/icon/keyboard-symbolic-dark.svg

@@ -6,7 +6,6 @@
 #define ONBOARDPLUGIN_H
 
 #include "pluginsiteminterface_v2.h"
-#include "onboarditem.h"
 #include "quickpanel.h"
 #include "tipswidget.h"
 
@@ -52,7 +51,7 @@ class OnboardPlugin : public QObject, public PluginsItemInterfaceV2
     bool m_pluginLoaded;
     bool m_startupState;
 
-    QScopedPointer<OnboardItem> m_onboardItem;
+    QScopedPointer<CommonIconButton> m_onboardIcon;
     QScopedPointer<Dock::TipsWidget> m_tipsLabel;
     QScopedPointer<QuickPanel> m_quickPanel;
 };