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columnview: Implement horizontal scrolling

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The listview inside always thinks it gets its full size,
and updates its horizontal adjustment accordingly.

So keep our own adjustment, and update it when allocating.
This commit is contained in:
Matthias Clasen 2020-05-31 21:09:00 -04:00
parent befdd8bb66
commit f0a0e20b2f
1 changed files with 43 additions and 7 deletions
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50
gtk/gtkcolumnview.c
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@ -35,6 +35,7 @@
#include "gtkscrollable.h"
#include "gtkwidgetprivate.h"
#include "gtksizerequest.h"
#include "gtkadjustment.h"
/**
* SECTION:gtkcolumnview
@ -64,6 +65,8 @@ struct _GtkColumnView
GtkColumnListItemFactory *factory;
GtkSorter *sorter;
GtkAdjustment *hadjustment;
};
struct _GtkColumnViewClass
@ -170,7 +173,7 @@ gtk_column_view_allocate_columns (GtkColumnView *self,
int width)
{
GtkScrollablePolicy scroll_policy;
int col_min, col_nat, widget_min, widget_nat, extra, col_size, x;
int col_min, col_nat, extra, col_size, x;
guint i;
int n;
GtkRequestedSize *sizes;
@ -228,8 +231,9 @@ gtk_column_view_allocate (GtkWidget *widget,
int baseline)
{
GtkColumnView *self = GTK_COLUMN_VIEW (widget);
int full_width, header_height, min, nat;
int full_width, header_height, min, nat, x;
x = gtk_adjustment_get_value (self->hadjustment);
full_width = gtk_column_view_allocate_columns (self, width);
gtk_widget_measure (self->header, GTK_ORIENTATION_VERTICAL, full_width, &min, &nat, NULL, NULL);
@ -237,11 +241,14 @@ gtk_column_view_allocate (GtkWidget *widget,
header_height = min;
else
header_height = nat;
gtk_widget_allocate (self->header, full_width, header_height, -1, NULL);
gtk_widget_allocate (self->header, full_width, header_height, -1,
gsk_transform_translate (NULL, &GRAPHENE_POINT_INIT (-x, 0)));
gtk_widget_allocate (GTK_WIDGET (self->listview),
full_width, height - header_height, -1,
gsk_transform_translate (NULL, &GRAPHENE_POINT_INIT (0, header_height)));
gsk_transform_translate (NULL, &GRAPHENE_POINT_INIT (-x, header_height)));
gtk_adjustment_configure (self->hadjustment, x, 0, full_width, width * 0.1, width * 0.9, width);
}
static void
@ -252,6 +259,23 @@ gtk_column_view_activate_cb (GtkListView *listview,
g_signal_emit (self, signals[ACTIVATE], 0, pos);
}
static void
adjustment_value_changed_cb (GtkAdjustment *adjustment,
GtkColumnView *self)
{
gtk_widget_queue_allocate (GTK_WIDGET (self));
}
static void
clear_adjustment (GtkColumnView *self)
{
if (self->hadjustment == NULL)
return;
g_signal_handlers_disconnect_by_func (self->hadjustment, adjustment_value_changed_cb, self);
g_clear_object (&self->hadjustment);
}
static void
gtk_column_view_dispose (GObject *object)
{
@ -270,6 +294,7 @@ gtk_column_view_dispose (GObject *object)
g_clear_object (&self->factory);
g_clear_object (&self->sorter);
clear_adjustment (self);
G_OBJECT_CLASS (gtk_column_view_parent_class)->dispose (object);
}
@ -299,7 +324,7 @@ gtk_column_view_get_property (GObject *object,
break;
case PROP_HADJUSTMENT:
g_value_set_object (value, gtk_scrollable_get_hadjustment (GTK_SCROLLABLE (self->listview)));
g_value_set_object (value, self->hadjustment);
break;
case PROP_HSCROLL_POLICY:
@ -343,13 +368,24 @@ gtk_column_view_set_property (GObject *object,
GParamSpec *pspec)
{
GtkColumnView *self = GTK_COLUMN_VIEW (object);
GtkAdjustment *adjustment;
switch (property_id)
{
case PROP_HADJUSTMENT:
if (gtk_scrollable_get_hadjustment (GTK_SCROLLABLE (self->listview)) != g_value_get_object (value))
adjustment = g_value_get_object (value);
if (adjustment == NULL)
adjustment = gtk_adjustment_new (0.0, 0.0, 0.0, 0.0, 0.0, 0.0);
g_object_ref_sink (adjustment);
if (self->hadjustment != adjustment)
{
gtk_scrollable_set_hadjustment (GTK_SCROLLABLE (self->listview), g_value_get_object (value));
clear_adjustment (self);
self->hadjustment = adjustment;
g_signal_connect (adjustment, "value-changed", G_CALLBACK (adjustment_value_changed_cb), self);
g_object_notify_by_pspec (G_OBJECT (self), properties[PROP_HADJUSTMENT]);
}
break;