News archive


SVGGraph 3.17

Version 3.17 of SVGGraph is a small update with three new options and a couple of bugs fixed. Nothing Gantt-related this time.

Spread out

Here is an example multi-line graph to demonstrate the new options.

Tighter X-axis, aligned text

The first new option probably isn't obvious from the example, but its name is axis_tightness_x. There was already a axis_tightness_y for allowing more space between the data and the axis end, the X-axis version is for removing space between the values and the end of the axis. In the example above the final X-axis value is 41, but the last division is at 40 - without the axis_tightness_x option set to 0 this axis would end at 50 and leave a data-free gap at the end.

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JPEG Saver 5.21.1

It's time for a .1 release, because there hasn't been one of those for a long time and I missed the excitement of it all. No, it's because I found a bug.

Where has my icon gone?

The main bug fixed in this version is in the desktop helper. It was quietly crashing when trying to update the database, an error caused by my adding in some code to load the file cache size option. The desktop helper doesn't even use the file cache, so I can't even claim it was crashing for a good reason.

This bug isn't all bad though, it prompted me to add compile-time validation for the option values so things like this should be a lot less likely in the future.

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JPEG Saver 5.21

It's time for another new version of JPEG Saver, later than I had hoped and with less in it. There's a pretty important bug fixed though, so I didn't want to wait until I had got more done.

What bug?

I'll admit that I didn't notice it for quite a while, but the buttons that choose the image position and the radio buttons that set up the colour management options were not working - they were not loading or saving their settings properly. So that's the bug that I have fixed in this version.

Another thing that I would call a bug is that using a navigation function while an image was loading would wait for the image to load before doing anything. That meant that if an image was loading really slowly and you pressed the right arrow to load the next image, the first image would load to completion and then get thrown away while the next image loaded. So that's fixed too.

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SVGGraph 3.16

Version 3.16 of SVGGraph continues my quest to produce a fully-featured Gantt chart class. I think I have all the important stuff done now, but please feel free to point out whatever is still missing.

Gantt charts (once more, with feeling)

The example below shows all the major changes in this version. Probably the most obvious is that there are axes all the way around the chart. This is enabled with the new axis_double_x and axis_double_y options, which duplicate the main X or Y axis on the other side of the graph. These options should work for all axis-based graph types, not just Gantt charts.

Double axes, axis padding and multiple Gantt entries

If you've read the caption, you'll see that there is axis padding now. Or maybe you noticed the gap - in any case, there are now options for adding space between the axis and the grid area, axis_pad_left, axis_pad_top, axis_pad_right and axis_pad_bottom. Because these options move the grid and axis apart there are also new options for what to do at the end of the axis: axis_extend_left, axis_extend_top, axis_extend_right and axis_extend_bottom. In the example they are left at the default values, which extend the axis lines to fill in the gap between the axes.

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SVGGraph 3.15

Version 3.14 added support for Gantt charts, but I didn't include all the features I had been meaning to add because I didn't want to delay the release while I added things that would be less useful. Version 3.15 adds in the things that I didn't get around to last time.

Gantt charts revisited

The example below is mostly the same as the last time, but with the addition of dependency lines. These link tasks, groups or milestones to display when previous tasks (or groups or milestones) must be completed or initiated before the current task can begin or complete.

A Gantt chart with dependencies

Setting up dependency lines is a little bit complicated and there are a few options for how they behave, so I've added a new page that covers them and a few of the other Gantt chart options here.

Read more . . .

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