Minor tweeks to the photosurface demo

The commit 0391a2fb98
makes a lot of improvements to the demo, but it also makes it
no longer search your system's photos directory by default.

This commit also updates the project files.
The CMakeLists.txt file will use qt_add_qml_module() among other
things that our guildelines recommend.
The .qrc file will have the /qt/qml/photosurface prefix, in order to
make qmake compatible with the AUTO_RESOURCE_PREFIX module.

Task-number: QTBUG-108924
Pick-to: 6.5
Change-Id: I19291ead744f8eebcd4151f02b44f746b2040319
Reviewed-by: Shawn Rutledge <shawn.rutledge@qt.io>

examples/demos/photosurface/CMakeLists.txt

@@ -14,10 +14,12 @@ set(INSTALL_EXAMPLEDIR "${INSTALL_EXAMPLESDIR}/demos/photosurface")
 
 find_package(Qt6 REQUIRED COMPONENTS Core Gui Qml Quick)
 
+qt_standard_project_setup(REQUIRES 6.5)
+
 if (WIN32)
 #! [appicon_windows]
     set(app_icon_resource_windows "${CMAKE_CURRENT_SOURCE_DIR}/resources/photosurface.rc")
-    qt_add_executable(photosurface main.cpp ${app_icon_resource_windows})
+    qt_add_executable(photosurfaceexample main.cpp ${app_icon_resource_windows})
 #! [appicon_windows]
 elseif (APPLE)
 #! [appicon_macOS]
@@ -31,34 +33,29 @@ elseif (APPLE)
     set_source_files_properties(${app_icon_macos} PROPERTIES
            MACOSX_PACKAGE_LOCATION "Resources")
 
-    qt_add_executable(photosurface MACOSX_BUNDLE main.cpp ${app_icon_macos})
+    qt_add_executable(photosurfaceexample MACOSX_BUNDLE main.cpp ${app_icon_macos})
 #! [appicon_macOS]
 else()
-    qt_add_executable(photosurface main.cpp)
+    qt_add_executable(photosurfaceexample main.cpp)
 endif()
 
-target_link_libraries(photosurface PUBLIC
+target_link_libraries(photosurfaceexample PRIVATE
     Qt::Core
     Qt::Gui
     Qt::Qml
     Qt::Quick
 )
 
-# Resources:
-set(photosurface_resource_files
-    "photosurface.qml"
-    "resources/folder.png"
-    "resources/MomentumAnimation.qml"
+qt_add_qml_module(photosurfaceexample
+    URI photosurface
+    QML_FILES
+      "photosurface.qml"
+      "resources/MomentumAnimation.qml"
+    RESOURCES
+      "resources/folder.png"
 )
 
-qt6_add_resources(photosurface "photosurface"
-    PREFIX
-        "/"
-    FILES
-        ${photosurface_resource_files}
-)
-
-install(TARGETS photosurface
+install(TARGETS photosurfaceexample
     RUNTIME DESTINATION "${INSTALL_EXAMPLEDIR}"
     BUNDLE DESTINATION "${INSTALL_EXAMPLEDIR}"
     LIBRARY DESTINATION "${INSTALL_EXAMPLEDIR}"

examples/demos/photosurface/main.cpp

@@ -46,7 +46,7 @@ int main(int argc, char* argv[])
     parser.process(app);
 
     QQmlApplicationEngine engine;
-    engine.load(QUrl("qrc:///photosurface.qml"));
+    engine.load(QUrl("qrc:/qt/qml/photosurface/photosurface.qml"));
     if (engine.rootObjects().isEmpty())
         return -1;
 

examples/demos/photosurface/photosurface.qml

@@ -1,5 +1,6 @@
 // Copyright (C) 2017 The Qt Company Ltd.
 // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
+import QtCore
 import QtQuick
 import QtQuick.Controls
 import QtQuick.Dialogs
@@ -160,9 +161,17 @@ Window {
     Shortcut { sequence: StandardKey.Quit; onActivated: Qt.quit() }
 
     Component.onCompleted: {
-        let lastArg = Application.arguments.slice(-1)[0]
-        if (/.*hotosurface.*|--+/.test(lastArg))
-            folderDialog.open()
+        const lastArg = Application.arguments.slice(-1)[0]
+        const standardPicturesLocations = StandardPaths.standardLocations(StandardPaths.PicturesLocation)
+        const hasValidPicturesLocation = standardPicturesLocations.length > 0
+        if (hasValidPicturesLocation)
+            folderDialog.currentFolder = standardPicturesLocations[0]
+        if (/.*hotosurface.*|--+/.test(lastArg)) {
+            if (hasValidPicturesLocation)
+                folderModel.folder = standardPicturesLocations[0]
+            else
+                folderDialog.open()
+        }
         else
             folderModel.folder = Qt.resolvedUrl("file:" + lastArg)
     }

examples/demos/photosurface/photosurface.qrc

@@ -1,5 +1,5 @@
 <RCC>
-    <qresource prefix="/">
+    <qresource prefix="/qt/qml/photosurface">
         <file>photosurface.qml</file>
         <file>resources/folder.png</file>
         <file>resources/MomentumAnimation.qml</file>