enhanced gui functionality

[SimonSegert]

Added:

• spin boxes to allow user to change bounds of visible window in slice diagram, while updating persistence diagram accordingly (bottom left corner of pd corresponds to bottom control dot, and length of sides of pd corresponds to length of main diagonal of visible window in slice diagram)

• "-inf<" strip along left side of persistence diagram to display deaths of barcodes whose births occur to the left of the current window

• three additional counters corresponding to: (1) barcodes which die too early to appear in the diagram, (2) essential and (3) nonessential barcodes which span the entire length of the persistence diagram

• two default window options in drop down menu (original view, and minimal view containing betti number supports)

• option to restore line to center of window if it goes out of bounds

• light gray box in viewing window circumscribing original view

Changed:

• internal scale of persistence diagram does not depend on size of application window. Previously, changing the size of this window could cause some dots to run off the diagram

[mlwright84]

Simon, thanks for your work on this! It looks very good overall.

However, starting with commit 5c4c3db, the viewer crashes (with a segmentation fault) as soon as it appears on the screen. The cause seems to be the following delete statements in SliceDiagram::redraw_labels()

delete rect1;
delete rect2;
...
delete rect6;

It seems that rect1, ..., rect6 are null pointers when they are deleted, and this causes a crash (on some systems, but evidently not on yours or Mike's). Could we edit the code to remove these delete statements? For example, could we simply move the rectangles without deleting them?

[SimonSegert]

Hi Matthew,

Thanks for your feedback!

I added a new commit, and I’m interested to know whether it fixes the issue on your machine (I just “new”-ed all the rectangles before the function gets called). I agree that deleting and new-ing the rectangles every time seems a little wasteful; I wasn’t sure how to move them without using a QPainter; do you know of a more proper way to move them?

Thanks!

On Feb 27, 2018, at 5:06 AM, Matthew Wright notifications@github.com wrote:

and this causes a crash (on some systems, but evidently not on yours or Mike's). Could we edit the code to remove these delete statements? For example, could we simply m

[mlwright84]

Simon, your change fixed the issue on my machine. However, I think that a more efficient solution would avoid the new and delete commands in redraw_labels(). This should be possible by using functions such as:

• Resize rectangles with QGraphicsRectItem::setRect()
• Move rectangles/text with QGraphicsItem::SetPos()
• Ensure that rectangles/text stay on top of the other visualization elements with QGraphicsItem::setZValue()

Could we try this approach?

[SimonSegert]

Thanks Matthew, I’ll try that.

On Feb 27, 2018, at 2:39 PM, Matthew Wright notifications@github.com wrote:

Simon, your change fixed the issue on my machine. However, I think that a more efficient solution would avoid the new and delete commands in redraw_labels(). This should be possible by using functions such as:

Resize rectangles with QGraphicsRectItem::setRect() Move rectangles/text with QGraphicsItem::SetPos() Ensure that rectangles/text stay on top of the other visualization elements with QGraphicsItem::setZValue() Could we try this approach?

— You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub https://github.com/rivetTDA/rivet/pull/108#issuecomment-369000414, or mute the thread https://github.com/notifications/unsubscribe-auth/ATXUE0Eh0-8u6ryOvD6d82_9iTIiHmfiks5tZFnmgaJpZM4R5khE.

[SimonSegert]

Matthew, I just pushed a new version which avoids the deletes.

On Feb 27, 2018, at 2:39 PM, Matthew Wright notifications@github.com wrote:

Simon, your change fixed the issue on my machine. However, I think that a more efficient solution would avoid the new and delete commands in redraw_labels(). This should be possible by using functions such as:

Resize rectangles with QGraphicsRectItem::setRect() Move rectangles/text with QGraphicsItem::SetPos() Ensure that rectangles/text stay on top of the other visualization elements with QGraphicsItem::setZValue() Could we try this approach?

— You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub https://github.com/rivetTDA/rivet/pull/108#issuecomment-369000414, or mute the thread https://github.com/notifications/unsubscribe-auth/ATXUE0Eh0-8u6ryOvD6d82_9iTIiHmfiks5tZFnmgaJpZM4R5khE.

[xoltar]

Hi @SimonSegert could you please rebase this onto current master to address the conflicts & then I'll review? Sorry for the delay, I didn't get any notification from github that Matthew had requested me to review it.

Thanks!

[SimonSegert]

Hi @xoltar this pull request is no longer up to date. I will close it, and soon will open up another request on another branch. Sorry for the confusion!