feat: use flat QGroupBoxes and set documentMode on QTabWidgets

Makes it consistent with other KCMs and and Kirigami KCMs.

@teams/vdg

Author: fesdonomist

CMakeLists.txt

@@ -47,6 +47,7 @@ include(ECMGenerateQmlTypes)
 find_package(KF6 ${KF6_MIN_VERSION} REQUIRED COMPONENTS
   Crash
   DBusAddons
+  WidgetsAddons
 )
 
 find_package(KF6Kirigami ${KF6_MIN_VERSION} CONFIG)

kcms/options/actions.ui

@@ -20,6 +20,9 @@ SPDX-License-Identifier: GPL-2.0-or-later
   <layout class="QVBoxLayout" name="verticalLayout">
    <item>
     <widget class="QGroupBox" name="groupBox_1">
+     <property name="flat">
+      <bool>true</bool>
+     </property>
      <property name="title">
       <string>Inactive Inner Window Actions</string>
      </property>
@@ -187,6 +190,9 @@ SPDX-License-Identifier: GPL-2.0-or-later
    </item>
    <item>
     <widget class="QGroupBox" name="groupBox_2">
+     <property name="flat">
+      <bool>true</bool>
+     </property>
      <property name="title">
       <string>Inner Window, Titlebar and Frame Actions</string>
      </property>

kcms/options/main.cpp

@@ -65,6 +65,7 @@ KWinOptions::KWinOptions(QObject* parent, const KPluginMetaData& data)
     QVBoxLayout* layout = new QVBoxLayout(widget());
     layout->setContentsMargins(0, 0, 0, 0);
     tab = new QTabWidget(widget());
+    tab->setDocumentMode(true);
     layout->addWidget(tab);
 
     const auto connectKCM = [this](KCModule* mod) {

kcms/options/mouse.ui

@@ -23,6 +23,9 @@ SPDX-License-Identifier: GPL-2.0-or-later
      <property name="title">
       <string>Titlebar Actions</string>
      </property>
+     <property name="flat">
+      <bool>true</bool>
+     </property>
      <layout class="QFormLayout" name="formLayout_1">
       <property name="formAlignment">
        <set>Qt::AlignHCenter|Qt::AlignTop</set>
@@ -139,6 +142,9 @@ SPDX-License-Identifier: GPL-2.0-or-later
      <property name="title">
       <string>Titlebar and Frame Actions</string>
      </property>
+     <property name="flat">
+      <bool>true</bool>
+     </property>
      <property name="alignment">
       <set>Qt::AlignCenter</set>
      </property>
@@ -220,7 +226,7 @@ SPDX-License-Identifier: GPL-2.0-or-later
         <item row="1" column="1">
          <widget class="QComboBox" name="kcfg_CommandActiveTitlebar1">
           <property name="sizePolicy">
-           <sizepolicy hsizetype="Expanding" vsizetype="Fixed">
+           <sizepolicy hsizetype="Fixed" vsizetype="Fixed">
             <horstretch>0</horstretch>
             <verstretch>0</verstretch>
            </sizepolicy>
@@ -325,7 +331,7 @@ SPDX-License-Identifier: GPL-2.0-or-later
         <item row="2" column="1">
          <widget class="QComboBox" name="kcfg_CommandActiveTitlebar2">
           <property name="sizePolicy">
-           <sizepolicy hsizetype="Expanding" vsizetype="Fixed">
+           <sizepolicy hsizetype="Fixed" vsizetype="Fixed">
             <horstretch>0</horstretch>
             <verstretch>0</verstretch>
            </sizepolicy>
@@ -430,7 +436,7 @@ SPDX-License-Identifier: GPL-2.0-or-later
         <item row="3" column="1">
          <widget class="QComboBox" name="kcfg_CommandActiveTitlebar3">
           <property name="sizePolicy">
-           <sizepolicy hsizetype="Expanding" vsizetype="Fixed">
+           <sizepolicy hsizetype="Fixed" vsizetype="Fixed">
             <horstretch>0</horstretch>
             <verstretch>0</verstretch>
            </sizepolicy>
@@ -555,6 +561,9 @@ SPDX-License-Identifier: GPL-2.0-or-later
      <property name="title">
       <string>Maximize Button Actions</string>
      </property>
+     <property name="flat">
+      <bool>true</bool>
+     </property>
      <layout class="QFormLayout" name="formLayout_2">
       <property name="formAlignment">
        <set>Qt::AlignHCenter|Qt::AlignTop</set>

kcms/tabbox/CMakeLists.txt

@@ -33,6 +33,7 @@ target_link_libraries(kcm_kwintabbox
   KF6::NewStuffWidgets
   KF6::Package
   KF6::Service
+  KF6::WidgetsAddons
   KF6::XmlGui
   Qt::Quick
   XCB::XCB

kcms/tabbox/main.cpp

@@ -30,6 +30,7 @@ SPDX-License-Identifier: GPL-2.0-or-later
 #include <QSpacerItem>
 #include <QStandardItemModel>
 #include <QStandardPaths>
+#include <QStyle>
 #include <QTabWidget>
 #include <QVBoxLayout>
 
@@ -47,6 +48,7 @@ KWinTabBoxConfig::KWinTabBoxConfig(QObject* parent, const KPluginMetaData& data)
     , m_data(new KWinTabboxData(this))
 {
     QTabWidget* tabWidget = new QTabWidget(widget());
+    tabWidget->setDocumentMode(true);
     m_primaryTabBoxUi = new KWinTabBoxConfigForm(KWinTabBoxConfigForm::TabboxType::Main,
                                                  m_data->tabBoxConfig(),
                                                  m_data->shortcutConfig(),
@@ -67,19 +69,28 @@ KWinTabBoxConfig::KWinTabBoxConfig(QObject* parent, const KPluginMetaData& data)
     });
 
     QHBoxLayout* buttonBar = new QHBoxLayout();
+    QStyle* style = widget()->style();
+
+    buttonBar->setContentsMargins(style->pixelMetric(QStyle::PM_LayoutLeftMargin),
+                                  0,
+                                  style->pixelMetric(QStyle::PM_LayoutRightMargin),
+                                  style->pixelMetric(QStyle::PM_LayoutBottomMargin));
     QSpacerItem* buttonBarSpacer
         = new QSpacerItem(40, 20, QSizePolicy::Expanding, QSizePolicy::Minimum);
     buttonBar->addItem(buttonBarSpacer);
     buttonBar->addWidget(ghnsButton);
 
     QVBoxLayout* layout = new QVBoxLayout(widget());
+    layout->setContentsMargins(0, 0, 0, 0);
     KTitleWidget* infoLabel = new KTitleWidget(tabWidget);
     infoLabel->setText(
         i18n("Focus policy settings limit the functionality of navigating through windows."),
         KTitleWidget::InfoMessage);
     infoLabel->setIcon(KTitleWidget::InfoMessage, KTitleWidget::ImageLeft);
     layout->addWidget(infoLabel, 0);
     layout->addWidget(tabWidget, 1);
+    KSeparator* separator = new KSeparator();
+    layout->addWidget(separator);
     layout->addLayout(buttonBar);
     widget()->setLayout(layout);