Allow to adjust the maximum size for previews.

svn path=/trunk/KDE/kdebase/apps/; revision=638109

2 files changed, 57 insertions, 2 deletions

diff --git a/src/generalviewsettingspage.cpp b/src/generalviewsettingspage.cpp
index e7a2893f7..5c1137fd2 100644
--- a/src/generalviewsettingspage.cpp
+++ b/src/generalviewsettingspage.cpp
@@ -26,20 +26,26 @@
 
 #include <assert.h>
 
+#include <QLabel>
 #include <QGroupBox>
 #include <QRadioButton>
+#include <QSlider>
+#include <QSpinBox>
 #include <QVBoxLayout>
 
+#include <kconfiggroup.h>
 #include <kdialog.h>
+#include <kglobal.h>
 #include <klocale.h>
-#include <kvbox.h>
+#include <khbox.h>
 
 GeneralViewSettingsPage::GeneralViewSettingsPage(DolphinMainWindow* mainWindow,
                                                  QWidget* parent) :
     KVBox(parent),
     m_mainWindow(mainWindow),
     m_localProps(0),
-    m_globalProps(0)
+    m_globalProps(0),
+    m_maxPreviewSize(0)
 {
     GeneralSettings* settings = DolphinSettings::instance().generalSettings();
     assert(settings != 0);
@@ -66,8 +72,48 @@ GeneralViewSettingsPage::GeneralViewSettingsPage(DolphinMainWindow* mainWindow,
     propsBoxLayout->addWidget(m_localProps);
     propsBoxLayout->addWidget(m_globalProps);
 
+    // create 'File Previews' box
     QGroupBox* previewBox = new QGroupBox(i18n("File Previews"), this);
 
+    QLabel* maxFileSize = new QLabel(i18n("Maximum file size:"), previewBox);
+
+    KHBox* vBox = new KHBox(previewBox);
+    vBox->setSpacing(spacing);
+
+    const int min = 1;   // MB
+    const int max = 100; // MB
+    m_maxPreviewSize = new QSlider(Qt::Horizontal, vBox);
+    m_maxPreviewSize->setRange(min, max);
+    m_maxPreviewSize->setPageStep(10);
+    m_maxPreviewSize->setSingleStep(1);
+    m_maxPreviewSize->setTickPosition(QSlider::TicksBelow);
+
+    KConfigGroup globalConfig(KGlobal::config(), "PreviewSettings");
+    const int maxByteSize = globalConfig.readEntry("MaximumSize", 1024 * 1024 /* 1 MB */);
+    int maxMByteSize = maxByteSize / (1024 * 1024);
+    if (maxMByteSize < 1) {
+        maxMByteSize = 1;
+    }
+    else if (maxMByteSize > max) {
+        maxMByteSize = max;
+    }
+    m_maxPreviewSize->setValue(maxMByteSize);
+
+    QSpinBox* spinBox = new QSpinBox(vBox);
+    spinBox->setRange(min, max);
+    spinBox->setSingleStep(1);
+    spinBox->setSuffix(" MB");
+    spinBox->setValue(m_maxPreviewSize->value());
+
+    connect(m_maxPreviewSize, SIGNAL(valueChanged(int)),
+            spinBox, SLOT(setValue(int)));
+    connect(spinBox, SIGNAL(valueChanged(int)),
+            m_maxPreviewSize, SLOT(setValue(int)));
+
+    QVBoxLayout* previewBoxLayout = new QVBoxLayout(previewBox);
+    previewBoxLayout->addWidget(maxFileSize);
+    previewBoxLayout->addWidget(vBox);
+
     // Add a dummy widget with no restriction regarding
     // a vertical resizing. This assures that the dialog layout
     // is not stretched vertically.
@@ -98,6 +144,13 @@ void GeneralViewSettingsPage::applySettings()
         ViewProperties globalProps(url);
         globalProps.setDirProperties(props);
     }
+
+    KConfigGroup globalConfig(KGlobal::config(), "PreviewSettings");
+    const int byteCount = m_maxPreviewSize->value() * 1024 * 1024; // value() returns size in MB
+    globalConfig.writeEntry("MaximumSize",
+                            byteCount,
+                            KConfigBase::Normal | KConfigBase::Global);
+    globalConfig.sync();
 }
 
 #include "generalviewsettingspage.moc"
diff --git a/src/generalviewsettingspage.h b/src/generalviewsettingspage.h
index 0d065a572..08257c6f1 100644
--- a/src/generalviewsettingspage.h
+++ b/src/generalviewsettingspage.h
@@ -25,6 +25,7 @@
 
 class DolphinMainWindow;
 class QRadioButton;
+class QSlider;
 
 /**
  * @brief Represents the page from the Dolphin Settings which allows
@@ -49,6 +50,7 @@ private:
     DolphinMainWindow* m_mainWindow;
     QRadioButton* m_localProps;
     QRadioButton* m_globalProps;
+    QSlider* m_maxPreviewSize;
 };
 
 #endif