• added SPTooltips for cell content in Content Table

- text strings are display with line breaks and tabs
- if cell content represents image data display that image as transparent thumbnail (by using base64 encoded HTML img tag)

Notes:
- SPTooltip implementation to show an image via a NSImageView will be implemented soon (the HTML way needs too much memory due to base64 encoded string)
- to discuss: Should we add a preference setting to display these tooltips?

3 files changed, 50 insertions, 1 deletions

diff --git a/Source/SPTextAndLinkCell.m b/Source/SPTextAndLinkCell.m
index eee3f517..90012fa9 100644
--- a/Source/SPTextAndLinkCell.m
+++ b/Source/SPTextAndLinkCell.m
@@ -264,4 +264,12 @@ static inline NSRect SPTextLinkRectFromCellRect(NSRect inRect) {
 	return lastLinkRow;
 }
 
+/**
+ * Suppress the built-in expansion tooltip
+ */
+- (NSRect)expansionFrameWithFrame:(NSRect)cellFrame inView:(NSView *)view
+{
+	return NSZeroRect;
+}
+
 @end
diff --git a/Source/SPTooltip.m b/Source/SPTooltip.m
index 94017795..793deb54 100644
--- a/Source/SPTooltip.m
+++ b/Source/SPTooltip.m
@@ -325,7 +325,7 @@ static float slow_in_out (float t)
 	float deltaY = p.y - aPoint.y;
 	float dist = sqrtf(deltaX * deltaX + deltaY * deltaY);
 
-	float moveThreshold = 20;
+	float moveThreshold = 10;
 	return dist > moveThreshold;
 }
 
diff --git a/Source/TableContent.m b/Source/TableContent.m
index 5ebb15f9..3f8c9596 100644
--- a/Source/TableContent.m
+++ b/Source/TableContent.m
@@ -43,6 +43,7 @@
 #import "SPTextAndLinkCell.h"
 #import "QLPreviewPanel.h"
 #import "SPFieldEditorController.h"
+#import "SPTooltip.h"
 
 @implementation TableContent
 
@@ -1789,6 +1790,46 @@
 #pragma mark -
 #pragma mark TableView delegate methods
 
+/**
+ * Show the table cell content as tooltip
+ * - for text displays line breaks and tabs as well
+ * - if blob data can be interpret as image data display the image as  transparent thumbnail
+ *    (up to now using base64 encoded HTML data)
+ */
+- (NSString *)tableView:(NSTableView *)aTableView toolTipForCell:(SPTextAndLinkCell *)aCell rect:(NSRectPointer)rect tableColumn:(NSTableColumn *)aTableColumn row:(NSInteger)row mouseLocation:(NSPoint)mouseLocation
+{
+
+	if([[aCell stringValue] length] < 1) return nil;
+
+	NSPoint pos = [NSEvent mouseLocation];
+	pos.y -= 20;
+	
+	// Get the original data for trying to display the blob data as an image
+	id theValue = NSArrayObjectAtIndex(NSArrayObjectAtIndex(tableValues, row), [[aTableColumn identifier] intValue]);
+	if ([theValue isKindOfClass:[NSData class]]) {
+		NSImage *image = [[NSImage alloc] initWithData:theValue];
+		if(image) {
+			int imageWidth = [image size].width;
+			if (imageWidth > 100) imageWidth = 100;
+			[SPTooltip showWithObject:[NSString stringWithFormat:
+					@"<IMG WIDTH='%d' SRC=\"data:image/auto;base64,%@\">", 
+						imageWidth, 
+						[[image TIFFRepresentationUsingCompression:NSTIFFCompressionJPEG factor:0.01] base64EncodingWithLineLength:0]]  
+				atLocation:pos 
+				ofType:@"html" 
+				displayOptions:[NSDictionary dictionaryWithObjectsAndKeys:@"transparent", @"transparent", nil]];
+		}
+		[image release];
+		return nil;
+	}
+
+	// Show the cell string value as tooltip (including line breaks and tabs)
+	if([[aCell stringValue] length] > 1)
+		[SPTooltip showWithObject:[aCell stringValue] atLocation:pos];
+
+	return nil;
+}
+
 - (int)numberOfRowsInTableView:(NSTableView *)aTableView
 {
 	return [tableValues count];