Allow to configure undo send feature

src/configuredialog/configureaccountpage.cpp

@@ -21,6 +21,7 @@
 #include "kmkernel.h"
 #include "settings/kmailsettings.h"
 #include "configagentdelegate.h"
+#include "undosend/undosendcombobox.h"
 #include "MessageComposer/MessageComposerSettings"
 #include "MailCommon/AccountConfigOrderDialog"
 #include "PimCommon/ConfigureImmutableWidgetUtils"
@@ -156,6 +157,18 @@ AccountsPageSendingTab::AccountsPageSendingTab(QWidget *parent)
     l = new QLabel(i18n("Defa&ult send method:"), group);
     l->setBuddy(mSendMethodCombo);
     glay->addWidget(l, 3, 0);
+
+    mUndoSend = new QCheckBox(i18n("Enable Undo Send"), this);
+    glay->addWidget(mUndoSend, 4, 0);
+    connect(mUndoSend, &QCheckBox::toggled, this, [this](bool state) {
+        mUndoSendComboBox->setEnabled(state);
+        Q_EMIT slotEmitChanged();
+    });
+
+    mUndoSendComboBox = new UndoSendCombobox(this);
+    mUndoSendComboBox->setEnabled(false);
+    glay->addWidget(mUndoSendComboBox, 4, 1);
+    connect(mUndoSendComboBox, qOverload<int>(&QComboBox::activated), this, &AccountsPageSendingTab::slotEmitChanged);
 }
 
 void AccountsPage::SendingTab::doLoadFromGlobalSettings()
@@ -168,6 +181,8 @@ void AccountsPage::SendingTab::doLoadOther()
     mSendMethodCombo->setCurrentIndex(MessageComposer::MessageComposerSettings::self()->sendImmediate() ? 0 : 1);
     loadWidget(mConfirmSendCheck, KMailSettings::self()->confirmBeforeSendItem());
     loadWidget(mCheckSpellingBeforeSending, KMailSettings::self()->checkSpellingBeforeSendItem());
+    loadWidget(mUndoSend, KMailSettings::self()->enabledUndoSendItem());
+    mUndoSendComboBox->setDelay(KMailSettings::self()->undoSendDelay());
 }
 
 void AccountsPage::SendingTab::save()
@@ -175,7 +190,9 @@ void AccountsPage::SendingTab::save()
     KMailSettings::self()->setSendOnCheck(mSendOnCheckCombo->currentIndex());
     saveCheckBox(mConfirmSendCheck, KMailSettings::self()->confirmBeforeSendItem());
     saveCheckBox(mCheckSpellingBeforeSending, KMailSettings::self()->checkSpellingBeforeSendItem());
+    saveCheckBox(mUndoSend, KMailSettings::self()->enabledUndoSendItem());
     MessageComposer::MessageComposerSettings::self()->setSendImmediate(mSendMethodCombo->currentIndex() == 0);
+    KMailSettings::self()->setUndoSendDelay(mUndoSendComboBox->delay());
 }
 
 QString AccountsPage::ReceivingTab::helpAnchor() const

src/configuredialog/configureaccountpage.h

@@ -24,6 +24,7 @@
 
 class QCheckBox;
 class QComboBox;
+class UndoSendCombobox;
 class OrgFreedesktopAkonadiNewMailNotifierInterface;
 namespace KLDAP {
 class LdapConfigureWidget;
@@ -47,6 +48,8 @@ private:
     QCheckBox *mCheckSpellingBeforeSending = nullptr;
     QComboBox *mSendOnCheckCombo = nullptr;
     QComboBox *mSendMethodCombo = nullptr;
+    UndoSendCombobox *mUndoSendComboBox = nullptr;
+    QCheckBox *mUndoSend = nullptr;
 };
 
 // subclasses: one class per tab:

src/settings/kmail.kcfg.cmake

@@ -430,4 +430,13 @@
      <default>100</default>
    </entry>
  </group>
+
+ <group name="UndoSend">
+   <entry name="EnabledUndoSend" type="Bool">
+     <default>false</default>
+   </entry>
+   <entry name="UndoSendDelay" type="int">
+     <default>10</default>
+   </entry>
+ </group>
 </kcfg>

src/undosend/undosendcombobox.cpp

@@ -42,3 +42,9 @@ int UndoSendCombobox::delay() const
 {
     return currentData().toInt();
 }
+
+void UndoSendCombobox::setDelay(int val)
+{
+    const int index = findData(val);
+    setCurrentIndex(index != -1 ? index : 0);
+}

src/undosend/undosendcombobox.h

@@ -31,6 +31,7 @@ public:
     ~UndoSendCombobox();
 
     Q_REQUIRED_RESULT int delay() const;
+    void setDelay(int val);
 private:
     void initialize();
 };