I'm trying to make a table which has the exact size of the printing area of my paper. But it seems I can't use specific measurements to make it that. Also, if I delete a row, I'd like it to change the height of every row accordingly so the total height stays the same.
Any advice?
For the table width you may select the table and then choose Table -> Table Properties, select Alignment = Manual and define the exact size of the printing paper.
The automatic height adjustment after a row deletion is not possible (at least at my knowledge)
Related
I am using sap.ui.table.Table. This table has some very good feature but I am having a tough time to figure out how to set the column to auto width.
Currently, all the columns are fixed size but I want something if column A value is small, then auto adjust it rather than having fixed size. Same for if the column value is large, then adjust it to show the value.
I saw the other question sap.ui.table.Table how to optimize column widths but the answers there are to get column layout with fixed sizes, not auto width.
The control sap.ui.table.Column offers a property called autoResizable by which the user can resize the column width depending on the content of the column's template.
<Column
autoResizable="true"
...
From API Reference:
Enables auto-resizing of the column on double clicking the resize bar. The width is determined on the widest currently displayed content. It does not consider rows which are currently not scrolled into view.
However, as you can see, it requires user interaction. Doing it without user interaction programmatically can be achieved by using the (currently experimental) API autoResizeColumn from sap.ui.table.Table.
myTable.autoResizeColumn(/*ColumnIndex*/); // experimental!
Here is an example of both approaches: https://embed.plnkr.co/NQpkJo/.
I have a TreeView whose columns are all expandable with fixed-mode sizing. I would like to restore the widths of the columns when the user restarts the app. It seems that calling set_fixed_size is the way to do this, but:
If I set only the widths of the columns that the user resized, then the actual column widths end up different from what they were before.
If instead I set all column widths explicitly, then all columns behave as though they had been resized by the user, which is not ideal.
Is there a way to restore the column widths that gets around these problems?
It turns out that expand interferes with fixed_width. In my case, the solution was to set fixed_width and expand=false on columns that the user resized, and expand=true on the others.
So it turns out that we'd like to use fixed height mode, because it's faster and it doesn't constantly try to update the treeview — we saw a significant decrease in CPU use with a table that, unfortunately, may contain a few thousand rows and some 20-ish columns.
Oddly enough, merely turning off autosizing on all the columns doesn't help, one needs to set fixed height mode too.
But of course, the cell contents are of varying length (they're text and numbers), and it would be nice to update the column size time to time (ie. when I know they should be updated, and not all the time like autosizing unfortunately does).
So what I need is being able to figure out that the newly inserted row / cell has insufficient size (I guess something to do with the GtkCellRendererText and Pango will come handy), and then resize the affected GtkTreeViewColumn using set_fixed_width. I've looked at the source of GTK+ to see what they do when autosizing, but couldn't really make head or tails of it. My main problem here is getting to the text layout and/or the cell size requirements from a given TreeView/ListStore/iter combination.
I use perl-Gtk2, but answers are welcome in any commonly used language.
I am creating one pdf file showing a list of all employees and their salaries. At the end of the page it is showing the total of all salaries.
I am using a for loop to add multiple rows to table.
The problem is:
at the end the row, the total salary doesn't fit on the same page and it is shown on the next page.
So is there any way that I can calculate the height of the page and then fix the height of each cell? And then accordingly, limit the number of rows.
So that at the end of the page, I can show the total number of rows and further record from next page.
Calculate the height of the page: well... you decide on the size of the page when you create a Document object. You can choose any size you want.
Calculate the height of a PdfPTable: that's explained in chapter 4 of my book. When you create a PdfPTable, you add PdfPCell objects to an object that only exists in memory and that doesn't know anything about page size. By default, the width is expressed as a percentage of the available width of the page to which you'll add the PdfPTable. Only when you add the PdfPTable to a specific Document, the exact width and the height will be calculated (which is too late for you).
If you want to know the height in advance, you need to define an absolute width (not a percentage). Tables with the same content and a different width will have a different height. Defining an absolute width is done like this:
table.setTotalWidth(width);
table.setLockedWidth(true);
In this snippet (taken from the TableHeight example), width equals the width of the page minus the left and right margin. You're defining the width of the page and the margins upon creation of the Document object. By default, the page size is A4, so the default width is 595 user units and the default margins are 36 user units.
So, one way to solve your problem, would be to add rows in a loop and calculate the height of each row with the getRowHeight() method or the height of the complete table with the getTotalHeight() method (both methods will return 0 if you omit setting the total height). If you see there's not enough space to add the summary row, you can use the deleteLastRow() method to remove that last row and to create it anew in a new table on the next page.
That's one solution. Another solution could be to use table and cell events, but that's more difficult to explain.
I want to have a tableview create rows that look like this:
value1 item1 container1
value10 item10 container10
value100 item100 container100
value2 item2 container2
What I am trying to show is that the first word (value) will have a set length of 12 and then the second word (item) will have a set length of 10 and then the last word (container) is just tagged on at the end.
I am pulling these from a SQLite database and don't want to use multiple lines, but read in a strictly formatted structure like this.
You can layout a custom UITableViewCell in Interface Builder, where you drag two UILabel views onto the Content View and set their size appropriately (Notice that the letters may vary in width, so even though you know it's 10 chars in length, you don't know the maximum width, please keep that in mind)
Then you just fill the open space at the right of a cell with another UILabel, layout it to cover the open space and set it to autoresize it's width and set the right margin to be fixed.
There are quite a few tutorials available on how to use the custom cell in your tableView, I can recommend you this screencast. It explains how you can initialize the custom cell and how you can access the custom labels.
It sounds like you want something like an old-fashion text display in which then nth character in row zero always lines up the nth character in every row.
Even using carefully positioned labels in a custom tableviewcell, you will have to strictly control the specific font and its size if you want all the characters to line up in fixed width column. You will need a fixed width font to begin with and you will have to set the size precisely.
You might want to consider whether this is necessary. iPhone users are used to propionate width text displays. Very precise columns of text might make it difficult to discern rows. I would test first with just a simple table before spending the time tweaking the columns.