Always assume max-columns and min-rows. The old approach was kinda
insane.
As an example, try to write an algorithm that optimizes the minimum size
for infinite (take a reasonably large number like 2520) word-wrapped
Monospace text cells containing the text "XXXXX XXX XXX XXXXX" (keep in
mind that this is the easy problem, because it's assuming equal cell
renderers). There's 4 ways to reasonably lay out this text:
19 glyphs (19x1):
XXXXX XXX XXX XXXXX
18 glyphs (9x2):
XXXXX XXX
XXX XXXXX
21 glyphs (7x3):
XXXXX
XXX XXX
XXXXX
20 glyphs (5x4):
XXXXX
XXX
XXX
XXXXX
The best thing to do usually is using the 9x2 approach, but that's
neither the one using the natural nor the one using the minimum size.
As a side note, this does not include spacing and padding, which might
also influence the decision. Nor does it include height-for-width
considerations. Look at this table (numbers given in glyphs, not pixels,
as for pixel-sizes it gets even more interesting):
given best solution
width columns sizing glyphs per cell
6 1 6x4 20
7 1 7x3 21
8 1 7x3 24
9 1 9x2 18
10 1/2 9x2/5x4 20
11 1/2 9x2/5x4 22
12 1/2 9x2/5x4 24
13 1/2 9x2/5x4 26
14 2 7x3 21
15 3 5x4 20
16 3 5x4 21.3
17 3 5x4 22.7
18 2 9x2 18
19 1/2 19x1/8x2 19
20 1/2/4 19x1/8x2/5x4 20
21 1-4 any 21
22 1-4 any 22
23 1-4 any 23
24 1-4 any 24
25 5 5x4 20
26 5 5x4 20.8
27 3 9x2 18
28 3 9x2 18.7
29 3 9x2 19.3
30 3/6 9x2/5x4 20
Now of course, nobody wants the number of columns to randomly change in
inexplicable ways while they enlarge or shrink an iconview, so we not
only have to optimize for smallest or other size measurements, but we
also have to optimize for "most pleasing to the eye".
And last but not least, I'd like to once again remind you - if you kept
up until now - that this discussion was for identically-sized cells
only.
Instead of just returning the last allocated numbers, we now compute the
proper sizes from scratch. This is a bit less trivial, but it results in
proper height-for-width handling.
This is a huge quest to remove all caching from GtkIconview to simplify
the code. As it turns out, iconview performance is a joke, so the caches
are kinda unnecessary.
If we need caching, we can add it in a useful way later.
If we use
&item->cell_area
instead of
(GdkRectangle *) item
there is no need anymore to keep the cell_area as the first member of
the the item. And we cget compile-time checks for changes to the item
struct.
This can cause lagging when scrolling as it causes us to repaint
on every scroll event. This wasn't historically a great problem,
but with smooth scrolling we get a lot more events, so this
now creates visible lagging on slower machines.
The widget window is usually covered by the bin_window.
Its background color will become relevant when we introduce
kinetic scrolling with overshooting.
As the draw handler expects the items to be laid out already, we cannot
queue a layout here to avoid a race condition with the resize that is
queued immediately after, which in turn would lead to a segfault later
in the paint_item() implementation.
https://bugzilla.gnome.org/show_bug.cgi?id=663138
which are SHIFT and MOD2 on the Mac, and SHIFT and CONTROL otherwise.
Use the new define all over the place and rename variables and
members to not say "shift" or "control".
Render GtkIconView cell items with the prelight state flag when they're
being mouse hovered.
This works basically in the same way it's done for GtkTreeView cells,
and e.g. GtkCellRendererPixbuf will need to have its follow-state
property to opt in to prelight rendering.
https://bugzilla.gnome.org/show_bug.cgi?id=615501
The code sets old_adj_ptr to the location containing the old weak ref,
but then wants to remove a weak ref from &view->old_hadj, causing warnings
when disposing the widget.
This commit introduces a new setting, gtk-visible-focus, backed
by the Gtk/VisibleFocus X setting. Its three values control how
focus rectangles are displayed.
'always' is equivalent to the traditional GTK+ behaviour of always
rendering focus rectangles.
'never' does what it says, and is intended for keyboardless
situations, e.g. tablets.
'automatic' hides focus rectangles initially, until the user
interacts with the keyboard, at which point focus rectangles
become visible.
https://bugzilla.gnome.org/show_bug.cgi?id=649567
In this patch we adress rows_reordered() and row_deleted() callbacks
(since some icon view subclasses manipulate the connected treemodel
from _init()).
Adding these cases here to cater to icon view subclasses that want to
access icon view APIs from the instance structure initializer instead
of properly waiting for the super class to initialize and adding renderers
from the ->constructor() vfunc.
I've decided that it is isn't feasible to make cell areas runtime-settable
in the time we have left before 3.0, therefore, I'm going with the
approach to allow init() functions to instantiate the default cell area
and issue a warning if a construct property is ignored.
This is not ideal, but it keeps existing icon view and combo box
subclasses working.
https://bugzilla.gnome.org/show_bug.cgi?id=639139
This change does not introduce any functionality change, mostly
cosmtic cleanups, like re-linebreak when introduced annotations messed
up indentation or whitespace errors fixes.
Seems the redraw was not happenning from keynav when set_focus_cell()
was called because keynav already updates the focus-cell. Now we
just unconditionally redraw the focus item when set_focus_cell() is
called.
Icon View was not initially setting focus on a cell when
focus initially comes into the view. Focusing into whatever
is the first cell in the cursor item when set_cursor_item
is called with a NULL cell fixes this.
GtkIconView sets the minimum width of the text cell to be at least 50
pixels and otherwise twice the width of the first pixbuf cell found
in the icon list.
GtkIconView should have a "grow-only" mode to handle optimization to
only allow icons to grow in width when rows change, however since
GtkIconView still does not handle large numbers of rows for now we'll
just relayout the whole thing whenever a series of rows change.
Also fixed up to watch the context incase of implicit resets.
of each row.
GtkIconView now properly calculates the height of each row separately
using a separate GtkCellAreaContext stored in an array which it can
always easily index with the item->row index for all purposes.
However, I'm going to have to figure a way to store the alignments
for rows separately, this may involve using a separate GtkCellAreaContext
for each row, unfortunately.
Some things still not sorted out, GtkCellAreaContext is not allocated
so icons dont recieve alignments yet, focus navigation is not exactly
what it used to be (maybe we can work around that by observing the
item orientation and explicitly setting focus to the same cell when
navigating in the wrong orientation).
This patch adds the GtkScrollablePolicy type property to GtkScrollable
and implements it in all subclasses. GtkScrolledWindow observes this
property to make a good guess about when to show/hide scrollbars for
height-for-width content.
Most scrollable children do not do height-for-width *yet* but
most certainly will (toolpalette, treeview, iconview, textview
widgets all TODO), for scrollable widgets that do have a minimum
and natural size, it's important for them to observe the state
of this property in order to properly drive the scroll adjustments
according to the desired GtkScrollablePolicy. This patch makes
GtkViewport do this.
Patch also adds tests/testscrolledwindow.c to display the effects
of this property.
It is just too annoying to have to implement these properties in
every scrollable. Instead, we now have ::min-content-height/width
in GtkScrolledWindow.
We also add GtkScrollablePolicy to determine how to size the
scrollable content.
The GtkScrollable interface provides "hadjustment" and "vadjustment"
properties that are used by GtkScrolledWindow. It replaces
the ::set_scroll_adjustment signal. The scrollable interface
also has ::min-display-width/height properties that can be
used to control the minimally visible part inside a scrolled window.
Remove the check for GTK_TREE_MODEL_LIST_ONLY and make the view
display only the first level of the tree, ignoring all insert, remove
etc. events on the model's branches. This enables generic application
code which always produces GtkTreeStores (also for flat lists) to
display grids of these flat trees.
gtk_icon_view_layout(), which can resize the bin window and thus
underlying surfaces, could be called from gtk_icon_view_draw(). So
we have to make sure that layouting is done before the draw handler is
called. We use the same construction as in tree view here, the layout
idle handler is installed with a higher priority than
GDK_PRIORITY_REDRAW and we wrap the call to gdk_window_process_updates()
in a new function that will flush the layout queue beforehand.
This mostly goes to keep consistency with the changes to GtkSizeRequest
in the last patch, as GtkCellSizeRequest requires GtkCellRenderer and
GtkCellRenderer implements GtkCellSizeRequest there's no use in keeping
them separate.
This patch renames the functions:
gtk_cell_size_request_get_request_mode()
=> gtk_cell_renderer_get_request_mode()
gtk_cell_size_request_get_width()
=> gtk_cell_renderer_get_preferred_width()
gtk_cell_size_request_get_height()
=> gtk_cell_renderer_get_preferred_height()
gtk_cell_size_request_get_size()
=> gtk_cell_renderer_get_preferred_size()
gtk_cell_size_request_get_width_for_height()
=> gtk_cell_renderer_get_preferred_width_for_height()
gtk_cell_size_request_get_height_for_width()
=> gtk_cell_renderer_get_preferred_height_for_width()
... and moves the corresponding vfuncs to GtkCellRenderer.
The patch also renames the implementations of these functions in cell
renderers to include the word "preferrred".
It doesn't make sense to keep them separate as GtkSizeRequest requires a
GtkWidget and GtkWidget implements GtkSizeRequest, so you can never have
one without the other.
It also makes the code a lot easier because no casts are required when
calling functions.
Also, the names would translate to gtk_widget_get_width() and people
agreed that this would be a too generic name, so a "preferred" was added
to the names.
So this patch moves the functions:
gtk_size_request_get_request_mode() => gtk_widget_get_request_mode()
gtk_size_request_get_width() => gtk_widget_get_preferred_width()
gtk_size_request_get_height() => gtk_widget_get_preferred_height()
gtk_size_request_get_size() => gtk_widget_get_preferred_size()
gtk_size_request_get_width_for_height() =>
gtk_widget_get_preferred_width_for_height()
gtk_size_request_get_height_for_width() =>
gtk_widget_get_preferred_height_for_width()
... and moves the corresponding vfuncs to the GtkWidgetClass.
The patch also renames the implementations of the vfuncs in widgets to
include the word "preferrred".
