Databases
StackOverflow2013
Postsdbo
PO
 

Note that there are some explanatory texts on larger screens.

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    <p>For anyone using objective-c:</p> <pre><code>- (BOOL)rectContainsLine:(CGRect)rect startPoint:(CGPoint)lineStart endPoint:(CGPoint)lineEnd { BOOL (^LineIntersectsLine)(CGPoint, CGPoint, CGPoint, CGPoint) = ^BOOL(CGPoint line1Start, CGPoint line1End, CGPoint line2Start, CGPoint line2End) { CGFloat q = //Distance between the lines' starting rows times line2's horizontal length (line1Start.y - line2Start.y) * (line2End.x - line2Start.x) //Distance between the lines' starting columns times line2's vertical length - (line1Start.x - line2Start.x) * (line2End.y - line2Start.y); CGFloat d = //Line 1's horizontal length times line 2's vertical length (line1End.x - line1Start.x) * (line2End.y - line2Start.y) //Line 1's vertical length times line 2's horizontal length - (line1End.y - line1Start.y) * (line2End.x - line2Start.x); if( d == 0 ) return NO; CGFloat r = q / d; q = //Distance between the lines' starting rows times line 1's horizontal length (line1Start.y - line2Start.y) * (line1End.x - line1Start.x) //Distance between the lines' starting columns times line 1's vertical length - (line1Start.x - line2Start.x) * (line1End.y - line1Start.y); CGFloat s = q / d; if( r &lt; 0 || r &gt; 1 || s &lt; 0 || s &gt; 1 ) return NO; return YES; }; /*Test whether the line intersects any of: *- the bottom edge of the rectangle *- the right edge of the rectangle *- the top edge of the rectangle *- the left edge of the rectangle *- the interior of the rectangle (both points inside) */ return (LineIntersectsLine(lineStart, lineEnd, CGPointMake(rect.origin.x, rect.origin.y), CGPointMake(rect.origin.x + rect.size.width, rect.origin.y)) || LineIntersectsLine(lineStart, lineEnd, CGPointMake(rect.origin.x + rect.size.width, rect.origin.y), CGPointMake(rect.origin.x + rect.size.width, rect.origin.y + rect.size.height)) || LineIntersectsLine(lineStart, lineEnd, CGPointMake(rect.origin.x + rect.size.width, rect.origin.y + rect.size.height), CGPointMake(rect.origin.x, rect.origin.y + rect.size.height)) || LineIntersectsLine(lineStart, lineEnd, CGPointMake(rect.origin.x, rect.origin.y + rect.size.height), CGPointMake(rect.origin.x, rect.origin.y)) || (CGRectContainsPoint(rect, lineStart) &amp;&amp; CGRectContainsPoint(rect, lineEnd))); } </code></pre>
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    1. This table or related slice is empty.
    1. PODetermine if line intersects CGRect
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    1. USmosca1337
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    1. This table or related slice is empty.
 

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Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

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If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

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