feat: change app icon

AppDir/pdf_signature-icon.svg

@@ -1,27 +1,52 @@
-<?xml version="1.0" encoding="utf-8"?>
+<?xml version="1.0" encoding="UTF-8"?>
+<svg
+	xmlns="http://www.w3.org/2000/svg"
+	xmlns:xlink="http://www.w3.org/1999/xlink"
+	viewBox="0 0 64 64"
+	width="64"
+	height="64"
+	role="img"
+	aria-labelledby="title desc"
+>
+	<title id="title">PDF Signature</title>
+	<desc id="desc">An app icon showing a PDF page with a folded corner and a handwritten signature.</desc>
 
-<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
+	<!-- Background tile -->
-<!-- Uploaded to: SVG Repo, www.svgrepo.com, Generator: SVG Repo Mixer Tools -->
+	<rect x="4" y="4" width="56" height="56" rx="12" fill="#2563EB" />
-<svg version="1.1" id="_x32_" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" 
+
-	 viewBox="0 0 512 512"  xml:space="preserve">
+	<!-- Paper with folded corner -->
-<style type="text/css">
-	.st0{fill:#000000;}
-</style>
 	<g>
-	<path class="st0" d="M56.007,114.35c-5.535-5.539-14.51-5.539-20.045,0L4.148,146.159c-5.531,5.539-5.531,14.506,0,20.046
+		<path
-		l20.622,20.621l51.859-51.855L56.007,114.35z"/>
+			d="M20 16h18l10 10v22c0 2.2-1.8 4-4 4H20c-2.2 0-4-1.8-4-4V20c0-2.2 1.8-4 4-4z"
-	<polygon class="st0" points="286.422,396.623 268.742,327.077 216.884,378.94 	"/>
+			fill="#FFFFFF"
-	<path class="st0" d="M258.136,316.475L86.058,144.397L34.2,196.26l172.073,172.077L258.136,316.475z M87.468,166.56
+		/>
-		l149.919,149.922l-11.784,11.78L75.684,178.348L87.468,166.56z"/>
+		<path
-	<rect x="195.662" y="132.491" class="st0" width="29.356" height="28.017"/>
+			d="M38 16v8c0 3.3 2.7 6 6 6h8l-14-14z"
-	<rect x="195.662" y="200.693" class="st0" width="29.356" height="28.009"/>
+			fill="#F3F4F6"
-	<rect x="256.69" y="132.491" class="st0" width="173.056" height="28.017"/>
+		/>
-	<rect x="256.69" y="200.693" class="st0" width="173.056" height="28.009"/>
+	</g>
-	<rect x="288.598" y="268.894" class="st0" width="141.148" height="28.01"/>
+
-	<path class="st0" d="M429.817,11.059H195.582c-45.32,0-82.182,36.858-82.182,82.179v32.726l30.427,30.435V93.238
+	<!-- Signature stroke -->
-		c0-28.586,23.178-51.752,51.755-51.752h234.235c28.594,0,51.756,23.166,51.756,51.752v254.042h-80.097
+	<path
-		c-23.822,0-43.124,19.318-43.124,43.132v80.101h-162.77c-28.578,0-51.755-23.166-51.755-51.752v-37.072l-6.234-1.587l6.234-6.235
+		d="M18 42c3-2 6-2.2 8.5 0 2.5 2.2 4.8 1.8 8.2-1.2 3.4-3 6.9-5.3 9.4-2.8 1.2 1.2 0.5 3.2-1.2 3.6-3.5 0.9 3.3-6.8 6.4-4.6 2 1.4-1.5 6.7-4.8 7.8-4.6 1.6-10.9-0.6-13.8-0.6-4.4 0-7.5 2.4-12 2.8"
-		v-22.202L113.4,321.239v97.522c0,45.313,36.862,82.179,82.182,82.179h162.77h12.598l8.917-8.913l123.224-123.224l8.909-8.912
+		fill="none"
-		v-12.61V93.238C512,47.917,475.138,11.059,429.817,11.059z"/>
+		stroke="#1F2937"
+		stroke-width="2.5"
+		stroke-linecap="round"
+		stroke-linejoin="round"
+	/>
+
+	<!-- Subtle page shadow for depth (kept minimal for clarity) -->
+	<path
+		d="M20 16h18l10 10v1H44c-4.4 0-8-3.6-8-8v-3H20c-1.1 0-2 .9-2 2v0c0-1.1.9-2 2-2z"
+		fill="#000"
+		opacity=".05"
+	/>
+
+	<!-- Optional PDF label dots (very subtle) -->
+	<g fill="#E53935" opacity=".9">
+		<circle cx="24" cy="28" r="1" />
+		<circle cx="28" cy="28" r="1" />
+		<circle cx="32" cy="28" r="1" />
 	</g>
 </svg>

android/app/src/main/AndroidManifest.xml

@@ -2,7 +2,7 @@
     <application
         android:label="pdf_signature"
         android:name="${applicationName}"
-        android:icon="@mipmap/ic_launcher">
+        android:icon="@mipmap/launcher_icon">
         <activity
             android:name=".MainActivity"
             android:exported="true"

assets/icon/pdf_signature-icon.svg

@@ -0,0 +1,52 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<svg
+	xmlns="http://www.w3.org/2000/svg"
+	xmlns:xlink="http://www.w3.org/1999/xlink"
+	viewBox="0 0 64 64"
+	width="64"
+	height="64"
+	role="img"
+	aria-labelledby="title desc"
+>
+	<title id="title">PDF Signature</title>
+	<desc id="desc">An app icon showing a PDF page with a folded corner and a handwritten signature.</desc>
+
+	<!-- Background tile -->
+	<rect x="4" y="4" width="56" height="56" rx="12" fill="#2563EB" />
+
+	<!-- Paper with folded corner -->
+	<g>
+		<path
+			d="M20 16h18l10 10v22c0 2.2-1.8 4-4 4H20c-2.2 0-4-1.8-4-4V20c0-2.2 1.8-4 4-4z"
+			fill="#FFFFFF"
+		/>
+		<path
+			d="M38 16v8c0 3.3 2.7 6 6 6h8l-14-14z"
+			fill="#F3F4F6"
+		/>
+	</g>
+
+	<!-- Signature stroke -->
+	<path
+		d="M18 42c3-2 6-2.2 8.5 0 2.5 2.2 4.8 1.8 8.2-1.2 3.4-3 6.9-5.3 9.4-2.8 1.2 1.2 0.5 3.2-1.2 3.6-3.5 0.9 3.3-6.8 6.4-4.6 2 1.4-1.5 6.7-4.8 7.8-4.6 1.6-10.9-0.6-13.8-0.6-4.4 0-7.5 2.4-12 2.8"
+		fill="none"
+		stroke="#1F2937"
+		stroke-width="2.5"
+		stroke-linecap="round"
+		stroke-linejoin="round"
+	/>
+
+	<!-- Subtle page shadow for depth (kept minimal for clarity) -->
+	<path
+		d="M20 16h18l10 10v1H44c-4.4 0-8-3.6-8-8v-3H20c-1.1 0-2 .9-2 2v0c0-1.1.9-2 2-2z"
+		fill="#000"
+		opacity=".05"
+	/>
+
+	<!-- Optional PDF label dots (very subtle) -->
+	<g fill="#E53935" opacity=".9">
+		<circle cx="24" cy="28" r="1" />
+		<circle cx="28" cy="28" r="1" />
+		<circle cx="32" cy="28" r="1" />
+	</g>
+</svg>

ios/Runner.xcodeproj/project.pbxproj

@@ -427,7 +427,7 @@
 			isa = XCBuildConfiguration;
 			buildSettings = {
 				ALWAYS_SEARCH_USER_PATHS = NO;
-				ASSETCATALOG_COMPILER_GENERATE_SWIFT_ASSET_SYMBOL_EXTENSIONS = YES;
+				ASSETCATALOG_COMPILER_GENERATE_SWIFT_ASSET_SYMBOL_EXTENSIONS = AppIcon;
 				CLANG_ANALYZER_NONNULL = YES;
 				CLANG_CXX_LANGUAGE_STANDARD = "gnu++0x";
 				CLANG_CXX_LIBRARY = "libc++";
@@ -484,7 +484,7 @@
 			isa = XCBuildConfiguration;
 			buildSettings = {
 				ALWAYS_SEARCH_USER_PATHS = NO;
-				ASSETCATALOG_COMPILER_GENERATE_SWIFT_ASSET_SYMBOL_EXTENSIONS = YES;
+				ASSETCATALOG_COMPILER_GENERATE_SWIFT_ASSET_SYMBOL_EXTENSIONS = AppIcon;
 				CLANG_ANALYZER_NONNULL = YES;
 				CLANG_CXX_LANGUAGE_STANDARD = "gnu++0x";
 				CLANG_CXX_LIBRARY = "libc++";

ios/Runner/Assets.xcassets/AppIcon.appiconset/Contents.json

@@ -1,122 +1 @@
-{
+{"images":[{"size":"20x20","idiom":"iphone","filename":"Icon-App-20x20@2x.png","scale":"2x"},{"size":"20x20","idiom":"iphone","filename":"Icon-App-20x20@3x.png","scale":"3x"},{"size":"29x29","idiom":"iphone","filename":"Icon-App-29x29@1x.png","scale":"1x"},{"size":"29x29","idiom":"iphone","filename":"Icon-App-29x29@2x.png","scale":"2x"},{"size":"29x29","idiom":"iphone","filename":"Icon-App-29x29@3x.png","scale":"3x"},{"size":"40x40","idiom":"iphone","filename":"Icon-App-40x40@2x.png","scale":"2x"},{"size":"40x40","idiom":"iphone","filename":"Icon-App-40x40@3x.png","scale":"3x"},{"size":"57x57","idiom":"iphone","filename":"Icon-App-57x57@1x.png","scale":"1x"},{"size":"57x57","idiom":"iphone","filename":"Icon-App-57x57@2x.png","scale":"2x"},{"size":"60x60","idiom":"iphone","filename":"Icon-App-60x60@2x.png","scale":"2x"},{"size":"60x60","idiom":"iphone","filename":"Icon-App-60x60@3x.png","scale":"3x"},{"size":"20x20","idiom":"ipad","filename":"Icon-App-20x20@1x.png","scale":"1x"},{"size":"20x20","idiom":"ipad","filename":"Icon-App-20x20@2x.png","scale":"2x"},{"size":"29x29","idiom":"ipad","filename":"Icon-App-29x29@1x.png","scale":"1x"},{"size":"29x29","idiom":"ipad","filename":"Icon-App-29x29@2x.png","scale":"2x"},{"size":"40x40","idiom":"ipad","filename":"Icon-App-40x40@1x.png","scale":"1x"},{"size":"40x40","idiom":"ipad","filename":"Icon-App-40x40@2x.png","scale":"2x"},{"size":"50x50","idiom":"ipad","filename":"Icon-App-50x50@1x.png","scale":"1x"},{"size":"50x50","idiom":"ipad","filename":"Icon-App-50x50@2x.png","scale":"2x"},{"size":"72x72","idiom":"ipad","filename":"Icon-App-72x72@1x.png","scale":"1x"},{"size":"72x72","idiom":"ipad","filename":"Icon-App-72x72@2x.png","scale":"2x"},{"size":"76x76","idiom":"ipad","filename":"Icon-App-76x76@1x.png","scale":"1x"},{"size":"76x76","idiom":"ipad","filename":"Icon-App-76x76@2x.png","scale":"2x"},{"size":"83.5x83.5","idiom":"ipad","filename":"Icon-App-83.5x83.5@2x.png","scale":"2x"},{"size":"1024x1024","idiom":"ios-marketing","filename":"Icon-App-1024x1024@1x.png","scale":"1x"}],"info":{"version":1,"author":"xcode"}}
-  "images" : [
-    {
-      "size" : "20x20",
-      "idiom" : "iphone",
-      "filename" : "Icon-App-20x20@2x.png",
-      "scale" : "2x"
-    },
-    {
-      "size" : "20x20",
-      "idiom" : "iphone",
-      "filename" : "Icon-App-20x20@3x.png",
-      "scale" : "3x"
-    },
-    {
-      "size" : "29x29",
-      "idiom" : "iphone",
-      "filename" : "Icon-App-29x29@1x.png",
-      "scale" : "1x"
-    },
-    {
-      "size" : "29x29",
-      "idiom" : "iphone",
-      "filename" : "Icon-App-29x29@2x.png",
-      "scale" : "2x"
-    },
-    {
-      "size" : "29x29",
-      "idiom" : "iphone",
-      "filename" : "Icon-App-29x29@3x.png",
-      "scale" : "3x"
-    },
-    {
-      "size" : "40x40",
-      "idiom" : "iphone",
-      "filename" : "Icon-App-40x40@2x.png",
-      "scale" : "2x"
-    },
-    {
-      "size" : "40x40",
-      "idiom" : "iphone",
-      "filename" : "Icon-App-40x40@3x.png",
-      "scale" : "3x"
-    },
-    {
-      "size" : "60x60",
-      "idiom" : "iphone",
-      "filename" : "Icon-App-60x60@2x.png",
-      "scale" : "2x"
-    },
-    {
-      "size" : "60x60",
-      "idiom" : "iphone",
-      "filename" : "Icon-App-60x60@3x.png",
-      "scale" : "3x"
-    },
-    {
-      "size" : "20x20",
-      "idiom" : "ipad",
-      "filename" : "Icon-App-20x20@1x.png",
-      "scale" : "1x"
-    },
-    {
-      "size" : "20x20",
-      "idiom" : "ipad",
-      "filename" : "Icon-App-20x20@2x.png",
-      "scale" : "2x"
-    },
-    {
-      "size" : "29x29",
-      "idiom" : "ipad",
-      "filename" : "Icon-App-29x29@1x.png",
-      "scale" : "1x"
-    },
-    {
-      "size" : "29x29",
-      "idiom" : "ipad",
-      "filename" : "Icon-App-29x29@2x.png",
-      "scale" : "2x"
-    },
-    {
-      "size" : "40x40",
-      "idiom" : "ipad",
-      "filename" : "Icon-App-40x40@1x.png",
-      "scale" : "1x"
-    },
-    {
-      "size" : "40x40",
-      "idiom" : "ipad",
-      "filename" : "Icon-App-40x40@2x.png",
-      "scale" : "2x"
-    },
-    {
-      "size" : "76x76",
-      "idiom" : "ipad",
-      "filename" : "Icon-App-76x76@1x.png",
-      "scale" : "1x"
-    },
-    {
-      "size" : "76x76",
-      "idiom" : "ipad",
-      "filename" : "Icon-App-76x76@2x.png",
-      "scale" : "2x"
-    },
-    {
-      "size" : "83.5x83.5",
-      "idiom" : "ipad",
-      "filename" : "Icon-App-83.5x83.5@2x.png",
-      "scale" : "2x"
-    },
-    {
-      "size" : "1024x1024",
-      "idiom" : "ios-marketing",
-      "filename" : "Icon-App-1024x1024@1x.png",
-      "scale" : "1x"
-    }
-  ],
-  "info" : {
-    "version" : 1,
-    "author" : "xcode"
-  }
-}

lib/data/services/export_service.dart

@@ -117,14 +117,15 @@ class ExportService {
                 for (var i = 0; i < pagePlacements.length; i++) {
                   final placement = pagePlacements[i];
                   final r = placement.rect;
-                  final left = r.left / uiPageSize.width * widthPts;
+                  // rect is stored in normalized units (0..1) relative to page
-                  final top = r.top / uiPageSize.height * heightPts;
+                  final left = r.left * widthPts;
-                  final w = r.width / uiPageSize.width * widthPts;
+                  final top = r.top * heightPts;
-                  final h = r.height / uiPageSize.height * heightPts;
+                  final w = r.width * widthPts;
+                  final h = r.height * heightPts;
 
                   // Process the signature asset with its graphic adjustments
-                  Uint8List? bytes = placement.asset.bytes;
+                  Uint8List bytes = placement.asset.bytes;
-                  if (bytes != null && bytes.isNotEmpty) {
+                  if (bytes.isNotEmpty) {
                     try {
                       // Decode the image
                       final decoded = img.decodeImage(bytes);
@@ -155,9 +156,11 @@ class ExportService {
                   }
 
                   // Use fallback if no bytes available
-                  bytes ??= signatureImageBytes;
+                  if (bytes.isEmpty && signatureImageBytes != null) {
+                    bytes = signatureImageBytes;
+                  }
 
-                  if (bytes != null && bytes.isNotEmpty) {
+                  if (bytes.isNotEmpty) {
                     pw.MemoryImage? imgObj;
                     try {
                       imgObj = pw.MemoryImage(bytes);
@@ -229,14 +232,15 @@ class ExportService {
               for (var i = 0; i < pagePlacements.length; i++) {
                 final placement = pagePlacements[i];
                 final r = placement.rect;
-                final left = r.left / uiPageSize.width * widthPts;
+                // rect is stored in normalized units (0..1) relative to page
-                final top = r.top / uiPageSize.height * heightPts;
+                final left = r.left * widthPts;
-                final w = r.width / uiPageSize.width * widthPts;
+                final top = r.top * heightPts;
-                final h = r.height / uiPageSize.height * heightPts;
+                final w = r.width * widthPts;
+                final h = r.height * heightPts;
 
                 // Process the signature asset with its graphic adjustments
-                Uint8List? bytes = placement.asset.bytes;
+                Uint8List bytes = placement.asset.bytes;
-                if (bytes != null && bytes.isNotEmpty) {
+                if (bytes.isNotEmpty) {
                   try {
                     // Decode the image
                     final decoded = img.decodeImage(bytes);
@@ -267,9 +271,11 @@ class ExportService {
                 }
 
                 // Use fallback if no bytes available
-                bytes ??= signatureImageBytes;
+                if (bytes.isEmpty && signatureImageBytes != null) {
+                  bytes = signatureImageBytes;
+                }
 
-                if (bytes != null && bytes.isNotEmpty) {
+                if (bytes.isNotEmpty) {
                   pw.MemoryImage? imgObj;
                   try {
                     // Ensure PNG for transparency if not already

lib/ui/features/pdf/view_model/pdf_view_model.dart

@@ -47,7 +47,10 @@ class PdfViewModel extends ChangeNotifier {
     }
   }
 
-  Document get document => ref.watch(documentRepositoryProvider);
+  // Do not watch the document repository here; watching would cause this
+  // ChangeNotifier to be disposed/recreated on every document change, which
+  // resets transient UI state like locked placements. Read instead.
+  Document get document => ref.read(documentRepositoryProvider);
 
   void jumpToPage(int page) {
     currentPage = page;

lib/ui/features/pdf/widgets/ui_services.dart

@@ -1,3 +1,4 @@
+import 'package:file_selector/file_selector.dart' as fs;
 import 'package:flutter_riverpod/flutter_riverpod.dart';
 import 'package:pdf_signature/data/services/export_service.dart';
 
@@ -9,5 +10,14 @@ final exportServiceProvider = Provider<ExportService>((ref) => ExportService());
 
 /// Provider for a function that picks a save path. Tests may override.
 final savePathPickerProvider = Provider<Future<String?> Function()>((ref) {
-  return () async => null;
+  return () async {
+    // Desktop save dialog with PDF filter; mobile platforms may not support this.
+    final group = fs.XTypeGroup(label: 'PDF', extensions: ['pdf']);
+    final location = await fs.getSaveLocation(
+      acceptedTypeGroups: [group],
+      suggestedName: 'signed.pdf',
+      confirmButtonText: 'Save',
+    );
+    return location?.path; // null if user cancels
+  };
 });

macos/Runner/Assets.xcassets/AppIcon.appiconset/Contents.json

@@ -1,4 +1,8 @@
 {
+    "info": {
+        "version": 1,
+        "author": "xcode"
+    },
     "images": [
         {
             "size": "16x16",
@@ -60,9 +64,5 @@
             "filename": "app_icon_1024.png",
             "scale": "2x"
         }
-  ],
+    ]
-  "info" : {
-    "version" : 1,
-    "author" : "xcode"
-  }
 }

pubspec.yaml

@@ -85,6 +85,7 @@ dev_dependencies:
   json_serializable: ^6.11.0
   dead_code_analyzer: ^1.1.0
   faker_dart: ^0.2.3
+  flutter_launcher_icons: "^0.14.4"
 
 # For information on the generic Dart part of this file, see the
 # following page: https://dart.dev/tools/pub/pubspec
@@ -128,3 +129,22 @@ flutter:
   #
   # For details regarding fonts from package dependencies,
   # see https://flutter.dev/to/font-from-package
+
+
+flutter_launcher_icons:
+  android: "launcher_icon"
+  ios: true
+  image_path: "assets/icon/pdf_signature-icon.png"
+  min_sdk_android: 21 # android min sdk min:16, default 21
+  web:
+    generate: true
+    image_path: "assets/icon/pdf_signature-icon.png"
+    background_color: "#hexcode"
+    theme_color: "#hexcode"
+  windows:
+    generate: true
+    image_path: "assets/icon/pdf_signature-icon.png"
+    icon_size: 48 # min:48, max:256, default: 48
+  macos:
+    generate: true
+    image_path: "assets/icon/pdf_signature-icon.png"

web/manifest.json

@@ -3,8 +3,8 @@
     "short_name": "pdf_signature",
     "start_url": ".",
     "display": "standalone",
-    "background_color": "#0175C2",
+    "background_color": "#hexcode",
-    "theme_color": "#0175C2",
+    "theme_color": "#hexcode",
     "description": "A new Flutter project.",
     "orientation": "portrait-primary",
     "prefer_related_applications": false,