added setting for fast seeking

dialogs/preferencesdialog.cpp

@@ -22,6 +22,8 @@ PreferencesDialog::PreferencesDialog(QWidget *parent) :
 {
     ui->setupUi(this);
 
+    ui->accurateSeekButton->setChecked(!config.fast_seeking);
+    ui->fastSeekButton->setChecked(config.fast_seeking);
 	ui->recordingComboBox->setCurrentIndex(config.recording_mode - 1);
     ui->imgSeqFormatEdit->setText(config.img_seq_formats);
 }
@@ -77,4 +79,5 @@ void PreferencesDialog::setup_kbd_shortcuts(QMenuBar* menubar) {
 void PreferencesDialog::on_buttonBox_accepted() {
 	config.recording_mode = ui->recordingComboBox->currentIndex() + 1;
     config.img_seq_formats = ui->imgSeqFormatEdit->text();
+    config.fast_seeking = ui->fastSeekButton->isChecked();
 }

dialogs/preferencesdialog.ui

@@ -17,7 +17,7 @@
    <item>
     <widget class="QTabWidget" name="tabWidget">
      <property name="currentIndex">
-      <number>0</number>
+      <number>2</number>
      </property>
      <widget class="QWidget" name="tab">
       <attribute name="title">
@@ -62,6 +62,38 @@
        <string>Behavior</string>
       </attribute>
      </widget>
+     <widget class="QWidget" name="tab_4">
+      <attribute name="title">
+       <string>Playback</string>
+      </attribute>
+      <layout class="QVBoxLayout" name="verticalLayout_2">
+       <item>
+        <widget class="QGroupBox" name="groupBox">
+         <property name="title">
+          <string>Seeking</string>
+         </property>
+         <layout class="QVBoxLayout" name="verticalLayout_3">
+          <item>
+           <widget class="QRadioButton" name="accurateSeekButton">
+            <property name="text">
+             <string>Accurate Seeking
+Always show the correct frame (visual may pause briefly as correct frame is retrieved)</string>
+            </property>
+           </widget>
+          </item>
+          <item>
+           <widget class="QRadioButton" name="fastSeekButton">
+            <property name="text">
+             <string>Fast Seeking
+Seek quickly (may briefly show inaccurate frames when seeking - doesn't affect playback/export)</string>
+            </property>
+           </widget>
+          </item>
+         </layout>
+        </widget>
+       </item>
+      </layout>
+     </widget>
      <widget class="QWidget" name="tab_3">
       <attribute name="title">
        <string>Keyboard</string>