Merge pull request #6872 from 0v3rt1r3d/0v3rt1r3d/max-zoom-preference

Implement maximal zoom feature

rtdata/languages/default

@@ -1945,6 +1945,7 @@ PREFERENCES_LENSFUNDBDIR;Lensfun database directory
 PREFERENCES_LENSFUNDBDIR_TOOLTIP;Directory containing the Lensfun database.  Leave empty to use the default directories.
 PREFERENCES_LENSPROFILESDIR;Lens profiles directory
 PREFERENCES_LENSPROFILESDIR_TOOLTIP;Directory containing Adobe Lens Correction Profiles (LCPs)
+PREFERENCES_MAX_ZOOM_TITLE;Maximum zoom
 PREFERENCES_MAXRECENTFOLDERS;Maximum number of recent folders
 PREFERENCES_MENUGROUPEXTPROGS;Group 'Open with'
 PREFERENCES_MENUGROUPFILEOPERATIONS;Group 'File operations'

rtgui/cropwindow.cc

@@ -43,6 +43,32 @@
 
 using namespace rtengine;
 
+namespace {
+    inline double zoomLimitToFraction(Options::MaxZoom z) {
+        switch (z) {
+          case Options::MaxZoom::PERCENTS_100:
+            return 1.;
+          case Options::MaxZoom::PERCENTS_200:
+            return 2.;
+          case Options::MaxZoom::PERCENTS_300:
+            return 3.;
+          case Options::MaxZoom::PERCENTS_400:
+            return 4.;
+          case Options::MaxZoom::PERCENTS_500:
+            return 5.;
+          case Options::MaxZoom::PERCENTS_600:
+            return 6.;
+          case Options::MaxZoom::PERCENTS_700:
+            return 7.;
+          case Options::MaxZoom::PERCENTS_800:
+            return 8.;
+          case Options::MaxZoom::PERCENTS_1600:
+          default:
+            return 16.;
+        }
+    }
+}
+
 bool CropWindow::initialized = false;
 
 Glib::ustring CropWindow::zoomOuttt;
@@ -2284,13 +2310,18 @@ void CropWindow::updateHoveredPicker (rtengine::Coord *imgPos)
 }
 void CropWindow::changeZoom (int zoom, bool notify, int centerx, int centery, bool needsRedraw)
 {
-
     if (zoom < 0) {
         zoom = 0;
     } else if (zoom > int(zoomSteps.size())-1) {
         zoom = int(zoomSteps.size())-1;
     }
 
+    // Limit zoom according to user preferences
+    double zoomLimit = zoomLimitToFraction(options.maxZoomLimit);
+    while(zoomSteps[zoom].zoom > zoomLimit && zoom != 0) {
+        --zoom;
+    }
+
     cropZoom = zoom;
 
     cropLabel = zoomSteps[cropZoom].label;

rtgui/options.cc

@@ -368,6 +368,7 @@ void Options::setDefaults()
     fbShowDateTime = true;
     fbShowBasicExif = true;
     fbShowExpComp = false;
+    maxZoomLimit = MaxZoom::PERCENTS_1600;
 #ifdef _WIN32
     // use windows setting for visibility of hidden files/folders
     SHELLFLAGSTATE sft = { 0 };
@@ -1729,6 +1730,9 @@ void Options::readFromFile(Glib::ustring fname)
                 if (keyFile.has_key("GUI", "ZoomOnScroll")) {
                     zoomOnScroll = keyFile.get_boolean("GUI", "ZoomOnScroll");
                 }
+                if (keyFile.has_key("GUI", "MaxZoom")) {
+                    maxZoomLimit = static_cast<MaxZoom>(keyFile.get_integer("GUI", "MaxZoom"));
+                }
             }
 
             if (keyFile.has_group("Crop Settings")) {
@@ -2582,6 +2586,7 @@ void Options::saveToFile(Glib::ustring fname)
         keyFile.set_integer("GUI", "Complexity", complexity);
         keyFile.set_boolean("GUI", "InspectorWindow", inspectorWindow);
         keyFile.set_boolean("GUI", "ZoomOnScroll", zoomOnScroll);
+        keyFile.set_integer("GUI", "MaxZoom", static_cast<int>(maxZoomLimit));
 
         //Glib::ArrayHandle<int> crvopen = crvOpen;
         //keyFile.set_integer_list ("GUI", "CurvePanelsExpanded", crvopen);

rtgui/options.h

@@ -368,6 +368,22 @@ public:
     CropGuidesMode cropGuides;
     bool cropAutoFit;
 
+    // Other options
+
+    // Maximum zoom
+    enum class MaxZoom: int {
+      PERCENTS_100 = 0,
+      PERCENTS_200,
+      PERCENTS_300,
+      PERCENTS_400,
+      PERCENTS_500,
+      PERCENTS_600,
+      PERCENTS_700,
+      PERCENTS_800,
+      PERCENTS_1600,
+    };
+    MaxZoom maxZoomLimit;
+
     // Performance options
     Glib::ustring clutsDir;
     int rgbDenoiseThreadLimit; // maximum number of threads for the denoising tool ; 0 = use the maximum available

rtgui/preferences.cc

@@ -744,6 +744,29 @@ Gtk::Widget* Preferences::getImageProcessingPanel ()
     cropFrame->add(*cropGrid);
     vbImageProcessing->pack_start(*cropFrame, Gtk::PACK_SHRINK, 4);
 
+    // Other: max zoom
+    {
+      Gtk::Frame *frame = Gtk::manage(new Gtk::Frame(M("GENERAL_OTHER")));
+      frame->set_label_align (0.025, 0.5);
+      Gtk::Grid *grid = Gtk::manage(new Gtk::Grid());
+
+      Gtk::Label *label = Gtk::manage(new Gtk::Label(M("PREFERENCES_MAX_ZOOM_TITLE") + ": ", Gtk::ALIGN_START));
+      label->set_line_wrap(true);
+      grid->attach(*label, 0, 0);
+
+      maxZoomCombo = Gtk::manage(new Gtk::ComboBoxText());
+
+      // Labels order matches to Options::MaxZoom enum
+      for (int i = 1; i <= 8; ++i) {
+        maxZoomCombo->append(Glib::ustring::compose("%100%%", i));
+      }
+      maxZoomCombo->append("1600%");
+
+      grid->attach(*maxZoomCombo, 1, 0, 1, 1);
+      frame->add(*grid);
+      vbImageProcessing->pack_start(*frame, Gtk::PACK_SHRINK, 4);
+    }
+
     swImageProcessing->add(*vbImageProcessing);
 
     return swImageProcessing;
@@ -1994,6 +2017,7 @@ void Preferences::storePreferences()
 
     moptions.cropGuides = Options::CropGuidesMode(cropGuidesCombo->get_active_row_number());
     moptions.cropAutoFit = cropAutoFitCB->get_active();
+    moptions.maxZoomLimit = Options::MaxZoom(maxZoomCombo->get_active_row_number());
 
     toolLocationPreference->updateOptions();
 
@@ -2228,6 +2252,7 @@ void Preferences::fillPreferences()
 
     cropGuidesCombo->set_active(moptions.cropGuides);
     cropAutoFitCB->set_active(moptions.cropAutoFit);
+    maxZoomCombo->set_active(static_cast<int>(options.maxZoomLimit));
 
     addc.block(false);
     setc.block(false);

rtgui/preferences.h

@@ -249,6 +249,8 @@ class Preferences final :
     Gtk::ComboBoxText *cropGuidesCombo;
     Gtk::CheckButton *cropAutoFitCB;
 
+    Gtk::ComboBoxText *maxZoomCombo;
+
     Gtk::ComboBoxText *metadataSyncCombo;
     Gtk::ComboBoxText *xmpSidecarCombo;