Fix drag/drop for CPKColorWell

ColorPicker/ColorPicker.xcodeproj/xcuserdata/georgen.xcuserdatad/xcdebugger/Breakpoints_v2.xcbkptlist

-<?xml version="1.0" encoding="UTF-8"?>
-<Bucket
-   type = "1"
-   version = "2.0">
-   <Breakpoints>
-      <BreakpointProxy
-         BreakpointExtensionID = "Xcode.Breakpoint.FileBreakpoint">
-         <BreakpointContent
-            shouldBeEnabled = "No"
-            ignoreCount = "0"
-            continueAfterRunningActions = "No"
-            filePath = "ColorPicker/CPKSliderView.m"
-            timestampString = "464294069.626344"
-            startingColumnNumber = "9223372036854775807"
-            endingColumnNumber = "9223372036854775807"
-            startingLineNumber = "65"
-            endingLineNumber = "65"
-            landmarkName = "-setSelectedValue:"
-            landmarkType = "5">
-            <Locations>
-               <Location
-                  shouldBeEnabled = "No"
-                  ignoreCount = "0"
-                  continueAfterRunningActions = "No"
-                  symbolName = "-[CPKSliderView setSelectedValue:]"
-                  moduleName = "ColorPicker"
-                  usesParentBreakpointCondition = "Yes"
-                  urlString = "file:///Users/georgen/iTerm2/ColorPicker/ColorPicker/CPKSliderView.m"
-                  timestampString = "464294177.641786"
-                  startingColumnNumber = "9223372036854775807"
-                  endingColumnNumber = "9223372036854775807"
-                  startingLineNumber = "65"
-                  endingLineNumber = "65"
-                  offsetFromSymbolStart = "24">
-               </Location>
-               <Location
-                  shouldBeEnabled = "No"
-                  ignoreCount = "0"
-                  continueAfterRunningActions = "No"
-                  symbolName = "-[CPKSliderView setSelectedValue:]"
-                  moduleName = "ColorPicker"
-                  usesParentBreakpointCondition = "Yes"
-                  urlString = "file:///Users/georgen/iTerm2/ColorPicker/ColorPicker/CPKSliderView.m"
-                  timestampString = "464294177.642019"
-                  startingColumnNumber = "9223372036854775807"
-                  endingColumnNumber = "9223372036854775807"
-                  startingLineNumber = "65"
-                  endingLineNumber = "65"
-                  offsetFromSymbolStart = "115">
-               </Location>
-            </Locations>
-         </BreakpointContent>
-      </BreakpointProxy>
-      <BreakpointProxy
-         BreakpointExtensionID = "Xcode.Breakpoint.FileBreakpoint">
-         <BreakpointContent
-            shouldBeEnabled = "No"
-            ignoreCount = "0"
-            continueAfterRunningActions = "No"
-            filePath = "ColorPicker/CPKMainViewController.m"
-            timestampString = "466468610.039889"
-            startingColumnNumber = "9223372036854775807"
-            endingColumnNumber = "9223372036854775807"
-            startingLineNumber = "183"
-            endingLineNumber = "183"
-            landmarkName = "-colorPanelDidClose:"
-            landmarkType = "5">
-         </BreakpointContent>
-      </BreakpointProxy>
-      <BreakpointProxy
-         BreakpointExtensionID = "Xcode.Breakpoint.FileBreakpoint">
-         <BreakpointContent
-            shouldBeEnabled = "No"
-            ignoreCount = "0"
-            continueAfterRunningActions = "No"
-            filePath = "ColorPicker/CPKMainViewController.m"
-            timestampString = "466468610.039889"
-            startingColumnNumber = "9223372036854775807"
-            endingColumnNumber = "9223372036854775807"
-            startingLineNumber = "169"
-            endingLineNumber = "169"
-            landmarkName = "-setColorPanel:"
-            landmarkType = "5">
-         </BreakpointContent>
-      </BreakpointProxy>
-   </Breakpoints>
-</Bucket>

ColorPicker/ColorPicker.xcodeproj/xcuserdata/georgen.xcuserdatad/xcschemes/ColorPickerDemo.xcscheme

-<?xml version="1.0" encoding="UTF-8"?>
-<Scheme
-   LastUpgradeVersion = "0630"
-   version = "1.3">
-   <BuildAction
-      parallelizeBuildables = "YES"
-      buildImplicitDependencies = "YES">
-      <BuildActionEntries>
-         <BuildActionEntry
-            buildForTesting = "YES"
-            buildForRunning = "YES"
-            buildForProfiling = "YES"
-            buildForArchiving = "YES"
-            buildForAnalyzing = "YES">
-            <BuildableReference
-               BuildableIdentifier = "primary"
-               BlueprintIdentifier = "A6184EC71BA874190088EF3C"
-               BuildableName = "ColorPickerDemo.app"
-               BlueprintName = "ColorPickerDemo"
-               ReferencedContainer = "container:ColorPicker.xcodeproj">
-            </BuildableReference>
-         </BuildActionEntry>
-      </BuildActionEntries>
-   </BuildAction>
-   <TestAction
-      buildConfiguration = "Debug"
-      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
-      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
-      shouldUseLaunchSchemeArgsEnv = "YES">
-      <Testables>
-      </Testables>
-      <MacroExpansion>
-         <BuildableReference
-            BuildableIdentifier = "primary"
-            BlueprintIdentifier = "A6184EC71BA874190088EF3C"
-            BuildableName = "ColorPickerDemo.app"
-            BlueprintName = "ColorPickerDemo"
-            ReferencedContainer = "container:ColorPicker.xcodeproj">
-         </BuildableReference>
-      </MacroExpansion>
-      <AdditionalOptions>
-      </AdditionalOptions>
-   </TestAction>
-   <LaunchAction
-      buildConfiguration = "Release"
-      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
-      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
-      launchStyle = "0"
-      useCustomWorkingDirectory = "NO"
-      ignoresPersistentStateOnLaunch = "NO"
-      debugDocumentVersioning = "YES"
-      debugServiceExtension = "internal"
-      allowLocationSimulation = "YES">
-      <BuildableProductRunnable
-         runnableDebuggingMode = "0">
-         <BuildableReference
-            BuildableIdentifier = "primary"
-            BlueprintIdentifier = "A6184EC71BA874190088EF3C"
-            BuildableName = "ColorPickerDemo.app"
-            BlueprintName = "ColorPickerDemo"
-            ReferencedContainer = "container:ColorPicker.xcodeproj">
-         </BuildableReference>
-      </BuildableProductRunnable>
-      <AdditionalOptions>
-      </AdditionalOptions>
-   </LaunchAction>
-   <ProfileAction
-      buildConfiguration = "Release"
-      shouldUseLaunchSchemeArgsEnv = "YES"
-      savedToolIdentifier = ""
-      useCustomWorkingDirectory = "NO"
-      debugDocumentVersioning = "YES">
-      <BuildableProductRunnable
-         runnableDebuggingMode = "0">
-         <BuildableReference
-            BuildableIdentifier = "primary"
-            BlueprintIdentifier = "A6184EC71BA874190088EF3C"
-            BuildableName = "ColorPickerDemo.app"
-            BlueprintName = "ColorPickerDemo"
-            ReferencedContainer = "container:ColorPicker.xcodeproj">
-         </BuildableReference>
-      </BuildableProductRunnable>
-   </ProfileAction>
-   <AnalyzeAction
-      buildConfiguration = "Debug">
-   </AnalyzeAction>
-   <ArchiveAction
-      buildConfiguration = "Release"
-      revealArchiveInOrganizer = "YES">
-   </ArchiveAction>
-</Scheme>

ColorPicker/ColorPicker/CPKColorWell.m

@@ -5,9 +5,11 @@
 @protocol CPKColorWellViewDelegate
 @property(nonatomic, readonly) void (^willOpenPopover)();
 @property(nonatomic, readonly) void (^willClosePopover)();
+
 - (NSRect)presentationRect;
 - (NSView *)presentingView;
 - (BOOL)isContinuous;
+- (void)colorChangedByDrag:(NSColor *)color;
 @end
 /** This really should be an NSCell. It provides the implementation of the CPKColorWell. */
@@ -26,7 +28,7 @@
 @end
-@interface CPKColorWellView() <NSPopoverDelegate>
+@interface CPKColorWellView() <NSDraggingDestination, NSDraggingSource, NSPopoverDelegate>
 @property(nonatomic) BOOL open;
 @property(nonatomic) CPKPopover *popover;
 @property(nonatomic, copy) void (^willClosePopover)(NSColor *);
@@ -41,6 +43,26 @@
 @implementation CPKColorWellView
+- (instancetype)initWithFrame:(NSRect)frameRect {
+    self = [super initWithFrame:frameRect];
+    if (self) {
+        [self colorWellViewCommonInit];
+    }
+    return self;
+}
+
+- (instancetype)initWithCoder:(NSCoder *)coder {
+    self = [super initWithCoder:coder];
+    if (self) {
+        [self colorWellViewCommonInit];
+    }
+    return self;
+}
+
+- (void)colorWellViewCommonInit {
+    [self registerForDraggedTypes:@[ NSPasteboardTypeColor ]];
+}
+
 - (void)awakeFromNib {
     self.cornerRadius = 3;
     self.open = NO;
@@ -48,12 +70,92 @@
 // Use mouseDown so this will work in a NSTableView.
 - (void)mouseDown:(NSEvent *)theEvent {
-    if (!_disabled && !self.open && theEvent.clickCount == 1) {
+    if (!self.delegate.isContinuous && theEvent.clickCount == 1) {
+        [self openPopOver];
+    }
+}
+
+- (void)mouseUp:(NSEvent *)theEvent {
+    if (self.delegate.isContinuous && theEvent.clickCount == 1) {
+        [self openPopOver];
+    }
+}
+
+- (void)openPopOver {
+    if (!_disabled && !self.open) {
         [self openPopOverRelativeToRect:_delegate.presentationRect
                                  ofView:_delegate.presentingView];
     }
 }
+- (void)mouseDragged:(NSEvent *)theEvent {
+    NSColor *color = self.selectedColor ?: [NSColor clearColor];
+    NSDraggingItem *dragItem = [[NSDraggingItem alloc] initWithPasteboardWriter:color];
+
+    dragItem.imageComponentsProvider = ^NSArray<NSDraggingImageComponent *> *(void) {
+        NSDraggingImageComponent *imageComponent =
+            [NSDraggingImageComponent draggingImageComponentWithKey:NSDraggingImageComponentIconKey];
+
+        NSImage *snapshot = [[NSImage alloc] initWithSize:self.frame.size];
+        [snapshot lockFocus];
+        [self drawRect:self.bounds];
+        [snapshot unlockFocus];
+
+        imageComponent.contents = snapshot;
+        imageComponent.frame = self.bounds;
+
+        return @[ imageComponent ];
+    };
+    [self beginDraggingSessionWithItems:@[ dragItem ]
+                                  event:theEvent
+                                 source:self];
+}
+
+#pragma mark - NSDraggingDestination
+
+- (NSDragOperation)draggingEntered:(id <NSDraggingInfo>)sender {
+    __block NSDragOperation operation = NSDragOperationNone;
+    [sender enumerateDraggingItemsWithOptions:0
+                                      forView:self
+                                      classes:@[ [NSColor class] ]
+                                searchOptions:@{}
+                                   usingBlock:^(NSDraggingItem * _Nonnull draggingItem, NSInteger idx, BOOL * _Nonnull stop) {
+                                       NSColor *color = draggingItem.item;
+                                       if (color) {
+                                           operation = NSDragOperationGeneric;
+                                           *stop = YES;
+                                       }
+                                   }];
+    return operation;
+}
+
+- (BOOL)performDragOperation:(id <NSDraggingInfo>)sender {
+    __block BOOL ok = NO;
+    [sender enumerateDraggingItemsWithOptions:0
+                                      forView:self
+                                      classes:@[ [NSColor class] ]
+                                searchOptions:@{}
+                                   usingBlock:^(NSDraggingItem * _Nonnull draggingItem, NSInteger idx, BOOL * _Nonnull stop) {
+                                       NSColor *color = draggingItem.item;
+                                       if (color) {
+                                           self.popover.selectedColor = color;
+                                           self.selectedColor = color;
+                                           [self.delegate colorChangedByDrag:color];
+
+                                           ok = YES;
+                                           *stop = YES;
+                                       }
+                                   }];
+    return ok;
+}
+
+
+#pragma mark - NSDraggingSource
+
+- (NSDragOperation)draggingSession:(NSDraggingSession *)session sourceOperationMaskForDraggingContext:(NSDraggingContext)context {
+    return NSDragOperationGeneric;
+}
+
 - (void)openPopOverRelativeToRect:(NSRect)presentationRect ofView:(NSView *)presentingView {
     __weak __typeof(self) weakSelf = self;
     self.selectedColor = self.color;
@@ -193,4 +295,9 @@
   return self;
 }
+- (void)colorChangedByDrag:(NSColor *)color {
+    [self setColor:color];
+    [self sendAction:self.action to:self.target];
+}
+
 @end

ColorPicker/ColorPicker/CPKMainViewController.h

@@ -25,4 +25,7 @@
                         color:(NSColor *)color
                  alphaAllowed:(BOOL)alphaAllowed;
+// Changes the selected color.
+- (void)selectColor:(NSColor *)color;
+
 @end

ColorPicker/ColorPicker/CPKMainViewController.m

@@ -58,10 +58,7 @@ static const CGFloat kBottomMargin = 8;
     __weak __typeof(self) weakSelf = self;
     self.rgbView = [[CPKRGBView alloc] initWithFrame:self.view.bounds
                                                block: ^(NSColor *color) {
-                                                   weakSelf.selectedColor = color;
-                                                   weakSelf.controlsView.swatchColor = color;
-                                                   _block(color);
-                                                   [weakSelf.favoritesView selectColor:color];
+                                                   [weakSelf selectColor:color];
                                                }
                                                color:_selectedColor
                                         alphaAllowed:self.alphaAllowed];
@@ -184,4 +181,11 @@ static const CGFloat kBottomMargin = 8;
     self.colorPanel = nil;
 }
+- (void)selectColor:(NSColor *)color {
+    self.selectedColor = color;
+    self.controlsView.swatchColor = color;
+    _block(color);
+    [self.favoritesView selectColor:color];
+}
+
 @end

ColorPicker/ColorPicker/CPKPopover.h

@@ -8,8 +8,8 @@
  */
 @interface CPKPopover : NSPopover
-/** Reflects the final selected color. */
-@property(nonatomic, readonly) NSColor *selectedColor;
+/** Reflects the final selected color. Setter changes color in open popover. */
+@property(nonatomic) NSColor *selectedColor;
 /** Called before popover closes. */
 @property(nonatomic, copy) void (^willClose)();

ColorPicker/ColorPicker/CPKPopover.m

@@ -32,6 +32,10 @@
     return self.mainViewController.selectedColor;
 }
+- (void)setSelectedColor:(NSColor *)selectedColor {
+  [self.mainViewController selectColor:selectedColor];
+}
+
 #pragma mark - NSPopoverDelegate
 - (void)popoverWillClose:(NSNotification *)notification {

ColorPicker/ColorPickerDemo/AppDelegate.m

@@ -4,6 +4,7 @@
 @interface AppDelegate ()
 @property (weak) IBOutlet NSWindow *window;
+@property (weak) IBOutlet NSColorWell *nativeColorWell;
 @property (nonatomic) CPKMainViewController *viewController;
 @end

ColorPicker/ColorPickerDemo/Base.lproj/MainMenu.xib

@@ -16,6 +16,7 @@
             <connections>
                 <outlet property="colorWell" destination="MuN-WJ-BSh" id="4ny-mc-o9u"/>
                 <outlet property="loremIpsum" destination="q6V-rV-d7b" id="IKg-5n-F76"/>
+                <outlet property="nativeColorWell" destination="shh-pD-JOT" id="sEJ-eC-EbT"/>
                 <outlet property="window" destination="QvC-M9-y7g" id="gIp-Ho-8D9"/>
             </connections>
         </customObject>
@@ -701,6 +702,10 @@
                             <color key="backgroundColor" name="controlColor" catalog="System" colorSpace="catalog"/>
                         </textFieldCell>
                     </textField>
+                    <colorWell fixedFrame="YES" translatesAutoresizingMaskIntoConstraints="NO" id="shh-pD-JOT">
+                        <rect key="frame" x="234" y="212" width="44" height="23"/>
+                        <color key="color" red="0.05813049898" green="0.055541899059999997" blue="1" alpha="1" colorSpace="calibratedRGB"/>
+                    </colorWell>
                     <customView fixedFrame="YES" translatesAutoresizingMaskIntoConstraints="NO" id="vGh-Vt-M6V" customClass="CPKColorWell">
                         <rect key="frame" x="397" y="313" width="53" height="27"/>
                         <userDefinedRuntimeAttributes>