Reader: Add option to show covers as single pages in double page mode

CHANGELOG.md

@@ -10,6 +10,7 @@ Version counting is based on semantic versioning (Major.Feature.Patch)
 ### YACReader
 * Image enlargement/stretching can now be disabled for fit
   to width and height
+* New option to show covers as single pages in double page mode (enabled by default)
 
 ### YACReaderLibrary
 * update QsLog logger to version 2.1, snapshot 46b643d5bcbc

YACReader/options_dialog.cpp

@@ -146,6 +146,19 @@ OptionsDialog::OptionsDialog(QWidget *parent)
     scaleLayout->addWidget(scaleCheckbox);
     scaleBox->setLayout(scaleLayout);
     layoutImageV->addWidget(scaleBox);
+
+    auto doublePageBox = new QGroupBox(tr("Double Page options"));
+    auto doublePageBoxLayout = new QVBoxLayout();
+    coverSPCheckBox = new QCheckBox(tr("Show covers as single page"));
+    connect(coverSPCheckBox, &QCheckBox::clicked,
+            [=](bool checked) {
+                settings->setValue(COVER_IS_SP, checked);
+                emit(changedImageOptions());
+            });
+
+    doublePageBoxLayout->addWidget(coverSPCheckBox);
+    doublePageBox->setLayout(doublePageBoxLayout);
+    layoutImageV->addWidget(doublePageBox);
     layoutImageV->addStretch();
 
     pageGeneral->setLayout(layoutGeneral);
@@ -236,6 +249,7 @@ void OptionsDialog::restoreOptions(QSettings *settings)
     gammaS->setValue(settings->value(GAMMA, 100).toInt());
 
     scaleCheckbox->setChecked(settings->value(ENLARGE_IMAGES, true).toBool());
+    coverSPCheckBox->setChecked(settings->value(COVER_IS_SP, true).toBool());
 }
 
 void OptionsDialog::updateColor(const QColor &color)

YACReader/options_dialog.h

@@ -26,6 +26,7 @@ private:
     QCheckBox *quickNavi;
     QCheckBox *disableShowOnMouseOver;
     QCheckBox *scaleCheckbox;
+    QCheckBox *coverSPCheckBox;
 
     QLabel *magGlassSizeLabel;
 

YACReader/render.cpp

@@ -11,6 +11,7 @@
 
 #include "comic_db.h"
 #include "yacreader_global_gui.h"
+#include "configuration.h"
 
 template<class T>
 inline const T &kClamp(const T &x, const T &low, const T &high)
@@ -544,6 +545,9 @@ QPixmap *Render::getCurrentDoubleMangaPage()
 
 bool Render::currentPageIsDoublePage()
 {
+    if (currentIndex == 0 && Configuration::getConfiguration().getSettings()->value(COVER_IS_SP, true).toBool()) {
+        return false;
+    }
     if (buffer[currentPageBufferedIndex]->isNull() || buffer[currentPageBufferedIndex + 1]->isNull()) {
         return false;
     }
@@ -583,6 +587,12 @@ bool Render::nextPageIsDoublePage()
 
 bool Render::previousPageIsDoublePage()
 {
+    qWarning("Previous page is doublepage!");
+    qWarning("%d", currentIndex);
+    qWarning("%d", currentPageBufferedIndex);
+    if (currentIndex == 2 && Configuration::getConfiguration().getSettings()->value(COVER_IS_SP, true).toBool()) {
+        return false;
+    }
     if (buffer[currentPageBufferedIndex - 1]->isNull() || buffer[currentPageBufferedIndex - 2]->isNull()) {
         return false;
     }

common/yacreader_global_gui.h

@@ -22,6 +22,7 @@
 #define START_TO_TRAY "START_TO_TRAY"
 #define DOUBLE_PAGE "DOUBLE_PAGE"
 #define DOUBLE_MANGA_PAGE "DOUBLE_MANGA_PAGE"
+#define COVER_IS_SP "COVER_IS_SP"
 #define BACKGROUND_COLOR "BACKGROUND_COLOR"
 #define ALWAYS_ON_TOP "ALWAYS_ON_TOP"
 #define SHOW_TOOLBARS "SHOW_TOOLBARS"