chore: add left/right padding to the main window

add left/right padding to the main window, or it looks like the
term content is cut.

3rdparty/terminalwidget/lib/qtermwidget.cpp

@@ -621,6 +621,17 @@ void QTermWidget::setTerminalWordCharacters(const QString &wc)
     m_impl->m_terminalDisplay->setWordCharacters(wc);
 }
 
+const QColor QTermWidget::backgroundColor() const
+{
+    const ColorEntry *table = m_impl->m_terminalDisplay->colorTable();
+    if (!table) {
+        qWarning() << "get terminal widget background color failed";
+        return QColor(); // Return a default color if the table is null
+    }
+    const QColor &background_color = table[DEFAULT_BACK_COLOR].color;
+    return background_color.isValid() ? background_color : QColor(); // Return a default color if the background color is invalid
+}
+
 /*******************************************************************************
  1. @函数:    setColorScheme
  2. @作者:    ut000125 sunchengxi

3rdparty/terminalwidget/lib/qtermwidget.h

@@ -100,6 +100,7 @@ class TERMINALWIDGET_EXPORT QTermWidget : public QWidget
     // Beware of a performance penalty and display/alignment issues when using a proportional font.
     void setTerminalFont(const QFont &font);
     QFont getTerminalFont();
+
     void setTerminalOpacity(qreal level);
     void setTerminalBackgroundImage(QString backgroundImage);
 
@@ -121,6 +122,8 @@ class TERMINALWIDGET_EXPORT QTermWidget : public QWidget
 
     void setTerminalWordCharacters(const QString &wc);
 
+    const QColor backgroundColor() const;
+
     /** @brief Sets the color scheme, default is white on black
      *
      * @param[in] name The name of the color scheme, either returned from

src/views/termwidgetpage.cpp

@@ -11,6 +11,7 @@
 #include "windowsmanager.h"
 #include "mainwindow.h"
 #include "define.h"
+#include "ColorScheme.h"
 
 #include <DLog>
 #include <DDialog>
@@ -58,7 +59,9 @@ TermWidgetPage::TermWidgetPage(const TermProperties &properties, QWidget *parent
     m_layout = new QVBoxLayout(this);
     m_layout->setObjectName("TermPageLayout");//Add by ut001000 renfeixiang 2020-08-13
     m_layout->setSpacing(0);
-    m_layout->setContentsMargins(0, 0, 0, 0);
+    m_layout->setMargin(0);
+    // FIXME(hualet): m_MainWindow->windowRadius() returns 0, so we use 8 as default.
+    m_layout->setContentsMargins(8, 0, 8, 0);
     m_layout->addWidget(w);
     setLayout(m_layout);
 
@@ -79,6 +82,7 @@ TermWidgetPage::TermWidgetPage(const TermProperties &properties, QWidget *parent
         m_findBar->move(width() - m_findBar->width(), 0);
     }, Qt::QueuedConnection);
 #endif
+    updateBackgroundColor();
 }
 
 inline void TermWidgetPage::handleKeywordChanged(const QString &keyword)
@@ -453,11 +457,17 @@ void TermWidgetPage::setTerminalOpacity(qreal opacity)
         term->setTermOpacity(opacity);
 }
 
-void TermWidgetPage::setColorScheme(const QString &name)
+void TermWidgetPage::updateBackgroundColor()
 {
-    QList<TermWidget *> termList = findChildren<TermWidget *>();
-    for (TermWidget *term : termList)
-        term->setColorScheme(name);
+    if (currentTerminal()) {
+        QColor color = currentTerminal()->backgroundColor();
+        color.setAlphaF(Settings::instance()->opacity());
+
+        QPalette palette = this->palette();
+        palette.setColor(QPalette::Background, color);
+        this->setPalette(palette);
+        this->setAutoFillBackground(true);
+    }
 }
 
 void TermWidgetPage::sendTextToCurrentTerm(const QString &text, bool isRemoteConnect)
@@ -709,6 +719,7 @@ void TermWidgetPage::handleUpdateSearchKeyword(const QString &keyword)
 void TermWidgetPage::applyTheme()
 {
     updateSplitStyle();
+    updateBackgroundColor();
 }
 
 void TermWidgetPage::updateSplitStyle()

src/views/termwidgetpage.h

@@ -159,12 +159,9 @@ class TermWidgetPage : public QWidget
      * @param opacity
      */
     void setTerminalOpacity(qreal opacity);
-    /**
-     * @brief 设置主题
-     * @author ut000439 wangpeili
-     * @param name
-     */
-    void setColorScheme(const QString &name);
+
+
+    void updateBackgroundColor();
 
     /**
      * @brief 发送文本到当前终端