Use new GUI icons that fit the recent platform styles.

Switched to a new flat color icon set on Windows/Mac and platform provided
icon themes (e.g. Breeze) on Linux with a fallback to the Papirus theme. All
the GUI icons are now SVG.

README.md

@@ -63,7 +63,8 @@ for translations.
 GPXSee is licensed under GPL-3.0 (only). However, some 3rd party parts are using
 different, GPL compatible, licenses:
 
-* [Oxygen icons](icons/GUI) - LGPLv3
+* [Icons8 Flat Color Icons](icons/GUI/FlatColor) - MIT
+* [Papirus icons](icons/GUI/Papirus) - GPLv3
 * [Mapbox Maki icons](icons/map/POI) - CC0
 * [Map Icons Collection](icons/symbols) - CC BY SA 3.0
 * [RTree implementation](src/common/rtree.h) - Public domain

gpxsee.pro

@@ -488,6 +488,8 @@ TRANSLATIONS = lang/gpxsee_en.ts \
     lang/gpxsee_ko.ts
 
 macx {
+    RESOURCES += theme-default.qrc
+
     ICON = icons/app/gpxsee.icns
     QMAKE_INFO_PLIST = pkg/mac/Info.plist
     locale.path = Contents/Resources/translations
@@ -502,11 +504,12 @@ macx {
     icons.files = $$files(icons/formats/*.icns)
     lproj.path = Contents/Resources
     lproj.files = $$files(pkg/mac/lproj/*)
-
     QMAKE_BUNDLE_DATA += locale maps symbols icons crs lproj
 }
 
 win32 {
+    RESOURCES += theme-default.qrc
+
     QMAKE_TARGET_DESCRIPTION = GPXSee
     QMAKE_TARGET_COPYRIGHT = Copyright (c) 2023 Martin Tuma
     RC_ICONS = icons/app/gpxsee.ico \
@@ -549,8 +552,9 @@ win32 {
 }
 
 unix:!macx:!android {
-    isEmpty(PREFIX):PREFIX = /usr/local
+    RESOURCES += theme-unix.qrc
 
+    isEmpty(PREFIX):PREFIX = /usr/local
     maps.files = $$files(data/maps/*)
     maps.path = $$PREFIX/share/gpxsee/maps
     crs.files = $$files(data/CRS/*)
@@ -572,6 +576,8 @@ unix:!macx:!android {
 }
 
 android {
+    RESOURCES += theme-default.qrc
+
     HEADERS += src/GUI/navigationwidget.h
     SOURCES += src/GUI/navigationwidget.cpp
 

gpxsee.qrc

@@ -1,58 +1,7 @@
 <RCC>
 	<!-- GUI icons -->
 	<qresource prefix="/">
-		<file alias="gpxsee.png">icons/app/gpxsee.png</file>
-		<file alias="[email protected]">icons/app/[email protected]</file>
-		<file alias="dialog-close.png">icons/GUI/dialog-close.png</file>
-		<file alias="[email protected]">icons/GUI/[email protected]</file>
-		<file alias="document-open.png">icons/GUI/document-open.png</file>
-		<file alias="[email protected]">icons/GUI/[email protected]</file>
-		<file alias="document-print.png">icons/GUI/document-print.png</file>
-		<file alias="[email protected]">icons/GUI/[email protected]</file>
-		<file alias="document-export.png">icons/GUI/document-export.png</file>
-		<file alias="[email protected]">icons/GUI/[email protected]</file>
-		<file alias="flag.png">icons/GUI/flag.png</file>
-		<file alias="[email protected]">icons/GUI/[email protected]</file>
-		<file alias="application-exit.png">icons/GUI/application-exit.png</file>
-		<file alias="[email protected]">icons/GUI/[email protected]</file>
-		<file alias="applications-internet.png">icons/GUI/applications-internet.png</file>
-		<file alias="[email protected]">icons/GUI/[email protected]</file>
-		<file alias="view-refresh.png">icons/GUI/view-refresh.png</file>
-		<file alias="[email protected]">icons/GUI/[email protected]</file>
-		<file alias="arrow-left.png">icons/GUI/arrow-left.png</file>
-		<file alias="[email protected]">icons/GUI/[email protected]</file>
-		<file alias="arrow-right.png">icons/GUI/arrow-right.png</file>
-		<file alias="[email protected]">icons/GUI/[email protected]</file>
-		<file alias="arrow-left-double.png">icons/GUI/arrow-left-double.png</file>
-		<file alias="[email protected]">icons/GUI/[email protected]</file>
-		<file alias="arrow-right-double.png">icons/GUI/arrow-right-double.png</file>
-		<file alias="[email protected]">icons/GUI/[email protected]</file>
-		<file alias="view-fullscreen.png">icons/GUI/view-fullscreen.png</file>
-		<file alias="[email protected]">icons/GUI/[email protected]</file>
-		<file alias="office-chart-line.png">icons/GUI/office-chart-line.png</file>
-		<file alias="[email protected]">icons/GUI/[email protected]</file>
-		<file alias="format-stroke-color.png">icons/GUI/format-stroke-color.png</file>
-		<file alias="[email protected]">icons/GUI/[email protected]</file>
-		<file alias="flag_32.png">icons/GUI/flag_32.png</file>
-		<file alias="[email protected]">icons/GUI/[email protected]</file>
-		<file alias="preferences-system.png">icons/GUI/preferences-system.png</file>
-		<file alias="[email protected]">icons/GUI/[email protected]</file>
-		<file alias="document-print_32.png">icons/GUI/document-print_32.png</file>
-		<file alias="[email protected]">icons/GUI/[email protected]</file>
-		<file alias="view-filter.png">icons/GUI/view-filter.png</file>
-		<file alias="[email protected]">icons/GUI/[email protected]</file>
-		<file alias="applications-internet_32.png">icons/GUI/applications-internet_32.png</file>
-		<file alias="[email protected]">icons/GUI/[email protected]</file>
-		<file alias="view-grid.png">icons/GUI/view-grid.png</file>
-		<file alias="[email protected]">icons/GUI/[email protected]</file>
-		<file alias="document-decrypt.png">icons/GUI/document-decrypt.png</file>
-		<file alias="[email protected]">icons/GUI/document-decrypt.png</file>
-		<file alias="document-encrypt.png">icons/GUI/document-encrypt.png</file>
-		<file alias="[email protected]">icons/GUI/document-encrypt.png</file>
-		<file alias="transform-move.png">icons/GUI/transform-move.png</file>
-		<file alias="[email protected]">icons/GUI/[email protected]</file>
-		<file alias="transform-move_32.png">icons/GUI/transform-move_32.png</file>
-		<file alias="[email protected]">icons/GUI/[email protected]</file>
+		<file alias="gpxsee.svg">icons/app/hicolor/scalable/apps/gpxsee.svg</file>
 	</qresource>
 
 	<!-- Common map stuff -->