rework of the images tab to avoid using widgets at all, painting is done manually

1 files changed, 63 insertions, 8 deletions

diff --git a/src/modinfodialogimages.h b/src/modinfodialogimages.h
index 6603660a..1c65d8bd 100644
--- a/src/modinfodialogimages.h
+++ b/src/modinfodialogimages.h
@@ -2,28 +2,62 @@
 #define MODINFODIALOGIMAGES_H
 
 #include "modinfodialogtab.h"
+#include <QScrollArea>
+
+class ImagesTab;
+
+class ImagesScrollArea : public QScrollArea
+{
+  Q_OBJECT;
+
+public:
+  using QScrollArea::QScrollArea;
+  void setTab(ImagesTab* tab);
+
+protected:
+  void resizeEvent(QResizeEvent* e) override;
+
+private:
+  ImagesTab* m_tab = nullptr;
+};
+
+
+class ImagesThumbnails : public QWidget
+{
+  Q_OBJECT;
+
+public:
+  using QWidget::QWidget;
+  void setTab(ImagesTab* tab);
+
+protected:
+  void paintEvent(QPaintEvent* e) override;
+  void mousePressEvent(QMouseEvent* e) override;
+
+private:
+  ImagesTab* m_tab = nullptr;
+};
+
 
 class ScalableImage : public QWidget
 {
   Q_OBJECT;
 
 public:
-  ScalableImage(QImage image={});
+  ScalableImage(QString path={});
 
+  void setImage(const QString& path);
   void setImage(QImage image);
-  const QImage& image() const;
+  void clear();
 
   bool hasHeightForWidth() const;
   int heightForWidth(int w) const;
 
-signals:
-    void clicked(const QImage& image);
-
 protected:
   void paintEvent(QPaintEvent* e) override;
-  void mousePressEvent(QMouseEvent* e) override;
 
 private:
+  QString m_path;
   QImage m_original, m_scaled;
   int m_border;
 };
@@ -32,6 +66,8 @@ private:
 class ImagesTab : public ModInfoDialogTab
 {
   Q_OBJECT;
+  friend class ImagesScrollArea;
+  friend class ImagesThumbnails;
 
 public:
   ImagesTab(
@@ -40,12 +76,31 @@ public:
 
   void clear() override;
   bool feedFile(const QString& rootPath, const QString& fullPath) override;
+  void update() override;
 
 private:
+  struct File
+  {
+    QString path;
+    QImage original, thumbnail;
+    bool failed = false;
+
+    File(QString path)
+      : path(std::move(path))
+    {
+    }
+  };
+
   ScalableImage* m_image;
+  std::vector<File> m_files;
+  int m_margins, m_padding, m_border;
+
+  void scrollAreaResized(const QSize& s);
+  void paintThumbnails(QPaintEvent* e);
+  void thumbnailsMouseEvent(QMouseEvent* e);
 
-  bool add(const QString& fullPath);
-  void onClicked(const QImage& image);
+  bool needsReload(const File& file, const QSize& thumbSize) const;
+  QSize scaledImageSize(const QSize& originalSize, const QSize& thumbSize) const;
 };
 
 #endif // MODINFODIALOGIMAGES_H