made the widgets a tad more modular and easier to implement. I'm sure there's way too much overhead now, but well, that can be optimized later

added shortcut overrides to loading and saving world files. You can of course use each widget multiple times, different shortcuts are important :)
Progress bar now respects the sizegrips width

main.py

@@ -7,10 +7,9 @@ from PyQt5.QtGui import QCursor
 from PyQt5.QtWidgets import (
     QMainWindow, QApplication, QWidget,
     QHBoxLayout, QVBoxLayout,
-    QProgressBar, QToolBar, QLabel, QPushButton
+    QProgressBar, QToolBar, QPushButton, QSizeGrip
 )
 
-# from formatter import Formatter
 from cursors import ChraniCursors
 from cursors import MouseCursorHelper
 from world_regions_widget import WorldRegionsWidget
@@ -65,59 +64,45 @@ class ChraniMapTools(QMainWindow, ChraniCursors):
         self.mouse_cursor_helper.center_label_signal.connect(self.center_label_slot)
 
     def init_ui(self):
-        toolbar = QToolBar()
-        label = QPushButton("world viewer")
-        toolbar.addWidget(label)
-        label = QPushButton("noise generator")
-        toolbar.addWidget(label)
-        application_focus_switcher = toolbar
+        # toolbar = QToolBar()
+        # label = QPushButton("world viewer")
+        # toolbar.addWidget(label)
+        # label = QPushButton("noise generator")
+        # toolbar.addWidget(label)
+        # application_focus_switcher = toolbar
 
         application_frame = QWidget()
         application_frame_layout = QVBoxLayout()
         application_frame_layout.setContentsMargins(0, 0, 0, 0)
 
-        action_pane_width = 256
-        self.progress_bar_helper.set_maximum_size(QSize(action_pane_width, 12))
+        widget_frame = QWidget()
+        widget_frame_layout = QHBoxLayout()
+        widget_frame_layout.setContentsMargins(0, 0, 0, 0)
+
+        effective_progress_bar_width = 256 - QSizeGrip(self).sizeHint().width()
+        self.progress_bar_helper.set_maximum_size(QSize(effective_progress_bar_width, 12))
         self.statusBar().addPermanentWidget(self.progress_bar_helper.progress_bar)
 
         # map viewer
-        map_viewer_window = QWidget()
-        map_viewer_window_layout = QHBoxLayout()
-        map_viewer_window_layout.setContentsMargins(0, 0, 0, 0)
-
-        region_view_width = 512
-        region_view = QWidget()
-        region_view_layout = QVBoxLayout()
-        region_view.setStyleSheet("background-color: #cccccc;")
-        region_view_layout.setContentsMargins(0, 0, 0, 0)
-
-        region_view.setLayout(region_view_layout)
-        region_view.setMinimumSize(QSize(region_view_width, region_view_width))
-
         world_regions_widget = WorldRegionsWidget(
             progress_bar_helper=self.progress_bar_helper,
-            mouse_cursor_helper=self.mouse_cursor_helper
+            mouse_cursor_helper=self.mouse_cursor_helper,
+            width=512
         )
-        region_view_layout.addWidget(world_regions_widget)
-        map_viewer_window_layout.addWidget(region_view)
-        map_viewer_window.setLayout(map_viewer_window_layout)
 
         # noise_generator
-        noise_generator_window = QWidget()
-        noise_generator_window_layout = QHBoxLayout()
-        noise_generator_window_layout.setContentsMargins(0, 0, 0, 0)
-
         noise_map_widget = NoiseMapWidget(
             progress_bar_helper=self.progress_bar_helper,
             mouse_cursor_helper=self.mouse_cursor_helper,
-            width=action_pane_width
+            width=256
         )
-        noise_generator_window_layout.addWidget(noise_map_widget)
-        noise_generator_window.setLayout(noise_generator_window_layout)
 
         # init view
-        application_frame_layout.addWidget(application_focus_switcher)
-        application_frame_layout.addWidget(map_viewer_window)
+        # application_frame_layout.addWidget(application_focus_switcher)
+        widget_frame_layout.addWidget(world_regions_widget)
+        widget_frame_layout.addWidget(noise_map_widget)
+        widget_frame.setLayout(widget_frame_layout)
+        application_frame_layout.addWidget(widget_frame)
         application_frame.setLayout(application_frame_layout)
 
         self.setCentralWidget(application_frame)