From 4df5b7a6f44e423bb38036187b7a1102865d1942 Mon Sep 17 00:00:00 2001
From: James Bunton <jamesbunton@fastmail.fm>
Date: Mon, 3 Jan 2011 09:29:10 +1100
Subject: [PATCH] Added preview feature

---
 English.lproj/NotiPod.xib | 510 ++++++++++++++++++++++++++++++++++++--
 notipod_gui.py            |  40 ++-
 2 files changed, 526 insertions(+), 24 deletions(-)

diff --git a/English.lproj/NotiPod.xib b/English.lproj/NotiPod.xib
index 7e59475..db670b5 100644
--- a/English.lproj/NotiPod.xib
+++ b/English.lproj/NotiPod.xib
@@ -8,8 +8,8 @@
 		<string key="IBDocument.HIToolboxVersion">461.00</string>
 		<object class="NSMutableArray" key="IBDocument.EditedObjectIDs">
 			<bool key="EncodedWithXMLCoder">YES</bool>
-			<integer value="429"/>
 			<integer value="372"/>
+			<integer value="527"/>
 			<integer value="29"/>
 		</object>
 		<object class="NSArray" key="IBDocument.PluginDependencies">
@@ -187,23 +187,24 @@
 				<string key="NSName">_NSMainMenu</string>
 			</object>
 			<object class="NSWindowTemplate" id="972006081">
-				<int key="NSWindowStyleMask">7</int>
+				<int key="NSWindowStyleMask">15</int>
 				<int key="NSWindowBacking">2</int>
-				<string key="NSWindowRect">{{335, 205}, {381, 545}}</string>
+				<string key="NSWindowRect">{{335, 223}, {381, 527}}</string>
 				<int key="NSWTFlags">1946157056</int>
 				<string key="NSWindowTitle">NotiPod</string>
 				<string key="NSWindowClass">NSWindow</string>
 				<nil key="NSViewClass"/>
 				<string key="NSWindowContentMaxSize">{3.40282e+38, 3.40282e+38}</string>
+				<string key="NSWindowContentMinSize">{381, 527}</string>
 				<object class="NSView" key="NSWindowView" id="439893737">
 					<reference key="NSNextResponder"/>
-					<int key="NSvFlags">256</int>
+					<int key="NSvFlags">274</int>
 					<object class="NSMutableArray" key="NSSubviews">
 						<bool key="EncodedWithXMLCoder">YES</bool>
 						<object class="NSTextField" id="818249148">
 							<reference key="NSNextResponder" ref="439893737"/>
 							<int key="NSvFlags">268</int>
-							<string key="NSFrame">{{17, 508}, {161, 17}}</string>
+							<string key="NSFrame">{{17, 490}, {161, 17}}</string>
 							<reference key="NSSuperview" ref="439893737"/>
 							<bool key="NSEnabled">YES</bool>
 							<object class="NSTextFieldCell" key="NSCell" id="574520385">
@@ -238,8 +239,8 @@
 						</object>
 						<object class="NSTextField" id="524945726">
 							<reference key="NSNextResponder" ref="439893737"/>
-							<int key="NSvFlags">268</int>
-							<string key="NSFrame">{{17, 125}, {254, 17}}</string>
+							<int key="NSvFlags">292</int>
+							<string key="NSFrame">{{17, 117}, {254, 17}}</string>
 							<reference key="NSSuperview" ref="439893737"/>
 							<bool key="NSEnabled">YES</bool>
 							<object class="NSTextFieldCell" key="NSCell" id="959016606">
@@ -254,7 +255,7 @@
 						</object>
 						<object class="NSButton" id="703636579">
 							<reference key="NSNextResponder" ref="439893737"/>
-							<int key="NSvFlags">268</int>
+							<int key="NSvFlags">292</int>
 							<string key="NSFrame">{{26, 12}, {120, 32}}</string>
 							<reference key="NSSuperview" ref="439893737"/>
 							<bool key="NSEnabled">YES</bool>
@@ -272,10 +273,30 @@
 								<int key="NSPeriodicInterval">25</int>
 							</object>
 						</object>
+						<object class="NSButton" id="952577652">
+							<reference key="NSNextResponder" ref="439893737"/>
+							<int key="NSvFlags">292</int>
+							<string key="NSFrame">{{146, 12}, {120, 32}}</string>
+							<reference key="NSSuperview" ref="439893737"/>
+							<bool key="NSEnabled">YES</bool>
+							<object class="NSButtonCell" key="NSCell" id="846675981">
+								<int key="NSCellFlags">67239424</int>
+								<int key="NSCellFlags2">134217728</int>
+								<string key="NSContents">Preview</string>
+								<reference key="NSSupport" ref="822023840"/>
+								<reference key="NSControlView" ref="952577652"/>
+								<int key="NSButtonFlags">-2038284033</int>
+								<int key="NSButtonFlags2">129</int>
+								<string key="NSAlternateContents"/>
+								<string key="NSKeyEquivalent"/>
+								<int key="NSPeriodicDelay">200</int>
+								<int key="NSPeriodicInterval">25</int>
+							</object>
+						</object>
 						<object class="NSPopUpButton" id="997567970">
 							<reference key="NSNextResponder" ref="439893737"/>
-							<int key="NSvFlags">268</int>
-							<string key="NSFrame">{{29, 93}, {335, 26}}</string>
+							<int key="NSvFlags">290</int>
+							<string key="NSFrame">{{29, 85}, {335, 26}}</string>
 							<reference key="NSSuperview" ref="439893737"/>
 							<bool key="NSEnabled">YES</bool>
 							<object class="NSPopUpButtonCell" key="NSCell" id="467826865">
@@ -330,7 +351,7 @@
 						</object>
 						<object class="NSTextField" id="323617138">
 							<reference key="NSNextResponder" ref="439893737"/>
-							<int key="NSvFlags">268</int>
+							<int key="NSvFlags">292</int>
 							<string key="NSFrame">{{17, 52}, {105, 17}}</string>
 							<reference key="NSSuperview" ref="439893737"/>
 							<bool key="NSEnabled">YES</bool>
@@ -346,7 +367,7 @@
 						</object>
 						<object class="NSScrollView" id="52653404">
 							<reference key="NSNextResponder" ref="439893737"/>
-							<int key="NSvFlags">268</int>
+							<int key="NSvFlags">274</int>
 							<object class="NSMutableArray" key="NSSubviews">
 								<bool key="EncodedWithXMLCoder">YES</bool>
 								<object class="NSClipView" id="1071723009">
@@ -531,7 +552,7 @@
 									<double key="NSPercent">9.969512e-01</double>
 								</object>
 							</object>
-							<string key="NSFrame">{{32, 160}, {329, 340}}</string>
+							<string key="NSFrame">{{32, 142}, {329, 340}}</string>
 							<reference key="NSSuperview" ref="439893737"/>
 							<reference key="NSNextKeyView" ref="1071723009"/>
 							<int key="NSsFlags">562</int>
@@ -541,10 +562,11 @@
 							<bytes key="NSScrollAmts">QSAAAEEgAABBmAAAQZgAAA</bytes>
 						</object>
 					</object>
-					<string key="NSFrameSize">{381, 545}</string>
+					<string key="NSFrameSize">{381, 527}</string>
 					<reference key="NSSuperview"/>
 				</object>
 				<string key="NSScreenRect">{{0, 0}, {1024, 746}}</string>
+				<string key="NSMinSize">{381, 549}</string>
 				<string key="NSMaxSize">{3.40282e+38, 3.40282e+38}</string>
 			</object>
 			<object class="NSCustomObject" id="719278169">
@@ -560,7 +582,7 @@
 				<nil key="NSViewClass"/>
 				<string key="NSWindowContentMaxSize">{3.40282e+38, 3.40282e+38}</string>
 				<object class="NSView" key="NSWindowView" id="851027294">
-					<reference key="NSNextResponder"/>
+					<nil key="NSNextResponder"/>
 					<int key="NSvFlags">256</int>
 					<object class="NSMutableArray" key="NSSubviews">
 						<bool key="EncodedWithXMLCoder">YES</bool>
@@ -612,7 +634,6 @@
 						</object>
 					</object>
 					<string key="NSFrameSize">{342, 100}</string>
-					<reference key="NSSuperview"/>
 				</object>
 				<string key="NSScreenRect">{{0, 0}, {1024, 746}}</string>
 				<string key="NSMaxSize">{3.40282e+38, 3.40282e+38}</string>
@@ -623,6 +644,331 @@
 			<object class="NSCustomObject" id="377758519">
 				<string key="NSClassName">FolderModel</string>
 			</object>
+			<object class="NSWindowTemplate" id="187688133">
+				<int key="NSWindowStyleMask">15</int>
+				<int key="NSWindowBacking">2</int>
+				<string key="NSWindowRect">{{196, -30}, {637, 540}}</string>
+				<int key="NSWTFlags">603979776</int>
+				<string key="NSWindowTitle">Preview</string>
+				<string key="NSWindowClass">NSWindow</string>
+				<nil key="NSViewClass"/>
+				<object class="NSView" key="NSWindowView" id="620478377">
+					<reference key="NSNextResponder"/>
+					<int key="NSvFlags">256</int>
+					<object class="NSMutableArray" key="NSSubviews">
+						<bool key="EncodedWithXMLCoder">YES</bool>
+						<object class="NSScrollView" id="603680047">
+							<reference key="NSNextResponder" ref="620478377"/>
+							<int key="NSvFlags">274</int>
+							<object class="NSMutableArray" key="NSSubviews">
+								<bool key="EncodedWithXMLCoder">YES</bool>
+								<object class="NSClipView" id="100919017">
+									<reference key="NSNextResponder" ref="603680047"/>
+									<int key="NSvFlags">2304</int>
+									<object class="NSMutableArray" key="NSSubviews">
+										<bool key="EncodedWithXMLCoder">YES</bool>
+										<object class="NSTextView" id="589394200">
+											<reference key="NSNextResponder" ref="100919017"/>
+											<int key="NSvFlags">2322</int>
+											<string key="NSFrameSize">{580, 72}</string>
+											<reference key="NSSuperview" ref="100919017"/>
+											<object class="NSTextContainer" key="NSTextContainer" id="567281533">
+												<object class="NSLayoutManager" key="NSLayoutManager">
+													<object class="NSTextStorage" key="NSTextStorage">
+														<object class="NSMutableString" key="NSString">
+															<characters key="NS.bytes">Lorem ipsum dolor sit er elit lamet, consectetaur cillium adipisicing pecu, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum Et harumd und lookum like Greek to me, dereud facilis est er expedit distinct. Nam liber te conscient to factor tum poen legum odioque civiuda</characters>
+														</object>
+														<object class="NSMutableArray" key="NSAttributes">
+															<bool key="EncodedWithXMLCoder">YES</bool>
+															<object class="NSDictionary">
+																<bool key="EncodedWithXMLCoder">YES</bool>
+																<object class="NSArray" key="dict.sortedKeys">
+																	<bool key="EncodedWithXMLCoder">YES</bool>
+																	<string>NSFont</string>
+																	<string>NSParagraphStyle</string>
+																</object>
+																<object class="NSMutableArray" key="dict.values">
+																	<bool key="EncodedWithXMLCoder">YES</bool>
+																	<object class="NSFont">
+																		<string key="NSName">LucidaGrande</string>
+																		<double key="NSSize">1.000000e+01</double>
+																		<int key="NSfFlags">2843</int>
+																	</object>
+																	<object class="NSParagraphStyle">
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+																			<object class="NSTextTab" id="520214937">
+																				<double key="NSLocation">0.000000e+00</double>
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+												<nil key="NSDefaultParagraphStyle"/>
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+											<int key="NSTVFlags">6</int>
+											<string key="NSMaxSize">{594, 1e+07}</string>
+											<string key="NSMinize">{223, 59}</string>
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+									<string key="NSFrame">{{1, 1}, {580, 504}}</string>
+									<reference key="NSSuperview" ref="603680047"/>
+									<reference key="NSNextKeyView" ref="589394200"/>
+									<reference key="NSDocView" ref="589394200"/>
+									<reference key="NSBGColor" ref="1023510502"/>
+									<object class="NSCursor" key="NSCursor">
+										<string key="NSHotSpot">{4, -5}</string>
+										<int key="NSCursorType">1</int>
+									</object>
+									<int key="NScvFlags">4</int>
+								</object>
+								<object class="NSScroller" id="764064753">
+									<reference key="NSNextResponder" ref="603680047"/>
+									<int key="NSvFlags">256</int>
+									<string key="NSFrame">{{581, 1}, {15, 504}}</string>
+									<reference key="NSSuperview" ref="603680047"/>
+									<reference key="NSTarget" ref="603680047"/>
+									<string key="NSAction">_doScroller:</string>
+									<double key="NSPercent">9.415205e-01</double>
+								</object>
+								<object class="NSScroller" id="818400468">
+									<reference key="NSNextResponder" ref="603680047"/>
+									<int key="NSvFlags">-2147483392</int>
+									<string key="NSFrame">{{-100, -100}, {87, 18}}</string>
+									<reference key="NSSuperview" ref="603680047"/>
+									<int key="NSsFlags">1</int>
+									<reference key="NSTarget" ref="603680047"/>
+									<string key="NSAction">_doScroller:</string>
+									<double key="NSCurValue">1.000000e+00</double>
+									<double key="NSPercent">9.456522e-01</double>
+								</object>
+							</object>
+							<string key="NSFrame">{{20, 20}, {597, 506}}</string>
+							<reference key="NSSuperview" ref="620478377"/>
+							<reference key="NSNextKeyView" ref="100919017"/>
+							<int key="NSsFlags">18</int>
+							<reference key="NSVScroller" ref="764064753"/>
+							<reference key="NSHScroller" ref="818400468"/>
+							<reference key="NSContentView" ref="100919017"/>
+						</object>
+					</object>
+					<string key="NSFrameSize">{637, 540}</string>
+					<reference key="NSSuperview"/>
+				</object>
+				<string key="NSScreenRect">{{0, 0}, {1280, 778}}</string>
+				<string key="NSMaxSize">{3.40282e+38, 3.40282e+38}</string>
+			</object>
 		</object>
 		<object class="IBObjectContainer" key="IBDocument.Objects">
 			<object class="NSMutableArray" key="connectionRecords">
@@ -779,6 +1125,30 @@
 					</object>
 					<int key="connectionID">524</int>
 				</object>
+				<object class="IBConnectionRecord">
+					<object class="IBActionConnection" key="connection">
+						<string key="label">doPreview:</string>
+						<reference key="source" ref="719278169"/>
+						<reference key="destination" ref="952577652"/>
+					</object>
+					<int key="connectionID">531</int>
+				</object>
+				<object class="IBConnectionRecord">
+					<object class="IBOutletConnection" key="connection">
+						<string key="label">previewWindow</string>
+						<reference key="source" ref="719278169"/>
+						<reference key="destination" ref="187688133"/>
+					</object>
+					<int key="connectionID">532</int>
+				</object>
+				<object class="IBConnectionRecord">
+					<object class="IBOutletConnection" key="connection">
+						<string key="label">previewText</string>
+						<reference key="source" ref="719278169"/>
+						<reference key="destination" ref="589394200"/>
+					</object>
+					<int key="connectionID">539</int>
+				</object>
 			</object>
 			<object class="IBMutableOrderedSet" key="objectRecords">
 				<object class="NSArray" key="orderedObjects">
@@ -940,11 +1310,12 @@
 						<object class="NSMutableArray" key="children">
 							<bool key="EncodedWithXMLCoder">YES</bool>
 							<reference ref="818249148"/>
-							<reference ref="323617138"/>
-							<reference ref="703636579"/>
 							<reference ref="52653404"/>
 							<reference ref="524945726"/>
+							<reference ref="703636579"/>
+							<reference ref="952577652"/>
 							<reference ref="997567970"/>
+							<reference ref="323617138"/>
 						</object>
 						<reference key="parent" ref="972006081"/>
 					</object>
@@ -1186,6 +1557,65 @@
 						<reference key="object" ref="340394509"/>
 						<reference key="parent" ref="726607121"/>
 					</object>
+					<object class="IBObjectRecord">
+						<int key="objectID">525</int>
+						<reference key="object" ref="952577652"/>
+						<object class="NSMutableArray" key="children">
+							<bool key="EncodedWithXMLCoder">YES</bool>
+							<reference ref="846675981"/>
+						</object>
+						<reference key="parent" ref="439893737"/>
+					</object>
+					<object class="IBObjectRecord">
+						<int key="objectID">526</int>
+						<reference key="object" ref="846675981"/>
+						<reference key="parent" ref="952577652"/>
+					</object>
+					<object class="IBObjectRecord">
+						<int key="objectID">527</int>
+						<reference key="object" ref="187688133"/>
+						<object class="NSMutableArray" key="children">
+							<bool key="EncodedWithXMLCoder">YES</bool>
+							<reference ref="620478377"/>
+						</object>
+						<reference key="parent" ref="0"/>
+						<string key="objectName">PreviewWindow</string>
+					</object>
+					<object class="IBObjectRecord">
+						<int key="objectID">528</int>
+						<reference key="object" ref="620478377"/>
+						<object class="NSMutableArray" key="children">
+							<bool key="EncodedWithXMLCoder">YES</bool>
+							<reference ref="603680047"/>
+						</object>
+						<reference key="parent" ref="187688133"/>
+					</object>
+					<object class="IBObjectRecord">
+						<int key="objectID">534</int>
+						<reference key="object" ref="603680047"/>
+						<object class="NSMutableArray" key="children">
+							<bool key="EncodedWithXMLCoder">YES</bool>
+							<reference ref="764064753"/>
+							<reference ref="818400468"/>
+							<reference ref="589394200"/>
+						</object>
+						<reference key="parent" ref="620478377"/>
+					</object>
+					<object class="IBObjectRecord">
+						<int key="objectID">535</int>
+						<reference key="object" ref="764064753"/>
+						<reference key="parent" ref="603680047"/>
+					</object>
+					<object class="IBObjectRecord">
+						<int key="objectID">536</int>
+						<reference key="object" ref="818400468"/>
+						<reference key="parent" ref="603680047"/>
+					</object>
+					<object class="IBObjectRecord">
+						<int key="objectID">537</int>
+						<reference key="object" ref="589394200"/>
+						<reference key="parent" ref="603680047"/>
+					</object>
 				</object>
 			</object>
 			<object class="NSMutableDictionary" key="flattenedProperties">
@@ -1231,6 +1661,8 @@
 					<string>371.IBWindowTemplateEditedContentRect</string>
 					<string>371.NSWindowTemplate.visibleAtLaunch</string>
 					<string>371.editorWindowContentRectSynchronizationRect</string>
+					<string>371.windowTemplate.hasMinSize</string>
+					<string>371.windowTemplate.minSize</string>
 					<string>372.IBPluginDependency</string>
 					<string>391.IBPluginDependency</string>
 					<string>392.IBPluginDependency</string>
@@ -1265,8 +1697,21 @@
 					<string>510.IBPluginDependency</string>
 					<string>514.IBPluginDependency</string>
 					<string>515.IBPluginDependency</string>
+					<string>517.IBPluginDependency</string>
+					<string>518.IBPluginDependency</string>
 					<string>521.IBPluginDependency</string>
 					<string>522.IBPluginDependency</string>
+					<string>525.IBPluginDependency</string>
+					<string>526.IBPluginDependency</string>
+					<string>527.IBEditorWindowLastContentRect</string>
+					<string>527.IBPluginDependency</string>
+					<string>527.IBWindowTemplateEditedContentRect</string>
+					<string>527.NSWindowTemplate.visibleAtLaunch</string>
+					<string>528.IBPluginDependency</string>
+					<string>534.IBPluginDependency</string>
+					<string>535.IBPluginDependency</string>
+					<string>536.IBPluginDependency</string>
+					<string>537.IBPluginDependency</string>
 					<string>56.IBPluginDependency</string>
 					<string>56.ImportedFromIB2</string>
 					<string>57.IBPluginDependency</string>
@@ -1281,7 +1726,7 @@
 					<string>com.apple.InterfaceBuilderKit</string>
 					<string>com.apple.InterfaceBuilderKit</string>
 					<string>com.apple.InterfaceBuilder.CocoaPlugin</string>
-					<integer value="1" id="9"/>
+					<reference ref="9"/>
 					<string>{{87, 691}, {163, 23}}</string>
 					<string>com.apple.InterfaceBuilder.CocoaPlugin</string>
 					<reference ref="9"/>
@@ -1312,10 +1757,12 @@
 					<reference ref="9"/>
 					<string>{74, 862}</string>
 					<string>{{529, 476}, {148, 20}}</string>
-					<string>{{249, 142}, {381, 545}}</string>
-					<string>{{249, 142}, {381, 545}}</string>
+					<string>{{249, 160}, {381, 527}}</string>
+					<string>{{249, 160}, {381, 527}}</string>
 					<reference ref="9"/>
 					<string>{{505, 213}, {252, 190}}</string>
+					<boolean value="YES"/>
+					<string>{381, 527}</string>
 					<string>com.apple.InterfaceBuilder.CocoaPlugin</string>
 					<string>com.apple.InterfaceBuilder.CocoaPlugin</string>
 					<string>com.apple.InterfaceBuilder.CocoaPlugin</string>
@@ -1353,6 +1800,19 @@
 					<string>com.apple.InterfaceBuilder.CocoaPlugin</string>
 					<string>com.apple.InterfaceBuilder.CocoaPlugin</string>
 					<string>com.apple.InterfaceBuilder.CocoaPlugin</string>
+					<string>com.apple.InterfaceBuilder.CocoaPlugin</string>
+					<string>com.apple.InterfaceBuilder.CocoaPlugin</string>
+					<string>com.apple.InterfaceBuilder.CocoaPlugin</string>
+					<string>{{158, 122}, {637, 540}}</string>
+					<string>com.apple.InterfaceBuilder.CocoaPlugin</string>
+					<string>{{158, 122}, {637, 540}}</string>
+					<boolean value="NO"/>
+					<string>com.apple.InterfaceBuilder.CocoaPlugin</string>
+					<string>com.apple.InterfaceBuilder.CocoaPlugin</string>
+					<string>com.apple.InterfaceBuilder.CocoaPlugin</string>
+					<string>com.apple.InterfaceBuilder.CocoaPlugin</string>
+					<string>com.apple.InterfaceBuilder.CocoaPlugin</string>
+					<string>com.apple.InterfaceBuilder.CocoaPlugin</string>
 					<reference ref="9"/>
 					<string>com.apple.InterfaceBuilder.CocoaPlugin</string>
 					<reference ref="9"/>
@@ -1377,7 +1837,7 @@
 				</object>
 			</object>
 			<nil key="sourceID"/>
-			<int key="maxID">524</int>
+			<int key="maxID">539</int>
 		</object>
 		<object class="IBClassDescriber" key="IBDocument.Classes">
 			<object class="NSMutableArray" key="referencedPartialClassDescriptions">
@@ -1415,12 +1875,14 @@
 						<object class="NSArray" key="dict.sortedKeys">
 							<bool key="EncodedWithXMLCoder">YES</bool>
 							<string>doCancel:</string>
+							<string>doPreview:</string>
 							<string>doSync:</string>
 						</object>
 						<object class="NSMutableArray" key="dict.values">
 							<bool key="EncodedWithXMLCoder">YES</bool>
 							<string>id</string>
 							<string>id</string>
+							<string>id</string>
 						</object>
 					</object>
 					<object class="NSMutableDictionary" key="outlets">
@@ -1432,6 +1894,8 @@
 							<string>loadingLabel</string>
 							<string>loadingSheet</string>
 							<string>playlistModel</string>
+							<string>previewText</string>
+							<string>previewWindow</string>
 							<string>window</string>
 						</object>
 						<object class="NSMutableArray" key="dict.values">
@@ -1442,6 +1906,8 @@
 							<string>id</string>
 							<string>id</string>
 							<string>id</string>
+							<string>id</string>
+							<string>id</string>
 						</object>
 					</object>
 					<reference key="sourceIdentifier" ref="660522976"/>
diff --git a/notipod_gui.py b/notipod_gui.py
index f4c6dde..4c175a9 100644
--- a/notipod_gui.py
+++ b/notipod_gui.py
@@ -112,12 +112,18 @@ class FolderModel(NSObject):
 
 class NotiPodController(NSObject):
 	window = objc.IBOutlet()
-	playlistModel = objc.IBOutlet()
-	folderModel = objc.IBOutlet()
+
 	loadingSheet = objc.IBOutlet()
 	loadingLabel = objc.IBOutlet()
 	loadingIndicator = objc.IBOutlet()
 
+	previewWindow = objc.IBOutlet()
+	previewText = objc.IBOutlet()
+
+	playlistModel = objc.IBOutlet()
+	folderModel = objc.IBOutlet()
+
+
 	def awakeFromNib(self):
 		self.runningGenerator = False
 
@@ -170,6 +176,36 @@ class NotiPodController(NSObject):
 	def doCancel_(self, sender):
 		self.runningGenerator = False
 
+	def doPreviewThread(self):
+		yield "Calculating changes..."
+
+		folder = self.folders()[0]
+		playlists = [self.library.get_playlist_pid(pid) for pid in self.playlists()]
+
+		all_tracks = []
+		for playlist in playlists:
+			all_tracks.extend(playlist.tracks)
+
+		gen = libnotipod.sync(
+			dry_run=True,
+			source=self.library.folder,
+			dest=folder, 
+			files_to_copy=all_tracks
+		)
+		self.previewResult = "\n".join(gen)
+
+	@objc.IBAction
+	def doPreview_(self, sender):
+		self.previewResult = ""
+		self.previewWindow.orderOut_(self)
+
+		def finish():
+			self.previewText.textStorage().mutableString().setString_(self.previewResult)
+			self.previewWindow.center()
+			self.previewWindow.makeKeyAndOrderFront_(self)
+
+		self.runGenerator(self.doPreviewThread, finish)
+
 	@objc.IBAction
 	def doSync_(self, sender):
 		folder = self.folders()[0]
-- 
2.39.2