Introduce step-wise line charts, extending the data model to have (possibly)...

Introduce step-wise line charts, extending the data model to have (possibly) separate data sets for each graph type, and changing the line shadows to include a horizontal component


git-svn-id: https://flot.googlecode.com/svn/trunk@138 1e0a6537-2640-0410-bfb7-f154510ff394

API.txt

@@ -421,6 +421,10 @@ Customizing the data series
     align: "left" or "center"
   }
 
+  lines: {
+    steps: boolean
+  }
+
   colors: [ color1, color2, ... ]
 
   shadowSize: number
@@ -457,6 +461,10 @@ instance, for time series the unit is milliseconds so 24 * 60 * 60 *
 a bar should be left-aligned (default) or centered on top of the value
 it represents.
 
+For lines, "steps" specifies whether two adjacent data points are
+connected with a straight (possibly diagonal) line or with first a
+horizontal and then a vertical line.
+
 The "colors" array specifies a default color theme to get colors for
 the data series from. You can specify as many colors as you like, like
 this:

NEWS.txt

@@ -40,10 +40,14 @@ Changes:
 - The option legend.margin can now specify horizontal and vertical
   margins independently (suggestion by someone who's annoyed).
 
-- Data passed into Flot is now copied to enable further processing
-  before it hits the drawing routines. As a side-effect, this should
-  make Flot more robust in the face of bad data (and fixes issue 112).
+- Data passed into Flot is now copied to a new canonical format to
+  enable further processing before it hits the drawing routines. As a
+  side-effect, this should make Flot more robust in the face of bad
+  data (and fixes issue 112).
 
+- Step-wise charting: line charts have a new option "steps" that when
+  set to true connects the points with steps instead of diagonal lines. 
+  
 
 Bug fixes:
 
@@ -77,6 +81,9 @@ Bug fixes:
 - Imported SVN version of excanvas and fixed an issue with the newer
   version. Hopefully, this will make Flot work with IE8 (nudge by
   Fabien Menager).
+- Changed the shadow code for lines to hopefully look a bit better
+  with vertical lines.
+
 
 Flot 0.5
 --------

examples/graph-types.html

@@ -36,7 +36,11 @@ $(function () {
     var d5 = [];
     for (var i = 0; i < 14; i += 0.5)
         d5.push([i, Math.sqrt(i)]);
-    
+
+    var d6 = [];
+    for (var i = 0; i < 14; i += 0.5 + Math.random())
+        d6.push([i, Math.sqrt(2*i + Math.sin(i) + 5)]);
+                        
     $.plot($("#placeholder"), [
         {
             data: d1,
@@ -58,6 +62,10 @@ $(function () {
             data: d5,
             lines: { show: true },
             points: { show: true }
+        },
+        {
+            data: d6,
+            lines: { show: true, steps: true }
         }
     ]);
 });