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viewport: Actually report the size we're gonna allocate

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Don't just pass on measure() calls, but actually behave in the way we
behave during size allocate.

This should improve cases where GtkScrolledWindow is used with GTK_POLICY_NEVER.
This commit is contained in:
Benjamin Otte 2021-12-07 21:54:02 +01:00
parent 9fd7e319f3
commit b8468af411
1 changed files with 50 additions and 50 deletions
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100
gtk/gtkviewport.c
View File

@ -143,17 +143,55 @@ gtk_viewport_buildable_init (GtkBuildableIface *iface)
iface->add_child = gtk_viewport_buildable_add_child;
}
static void
gtk_viewport_measure_child (GtkViewport *viewport,
int size[2])
{
GtkOrientation orientation, opposite;
int min, nat;
if (viewport->child == NULL ||
!gtk_widget_is_visible (viewport->child))
{
size[0] = 0;
size[1] = 0;
return;
}
if (gtk_widget_get_request_mode (viewport->child) == GTK_SIZE_REQUEST_WIDTH_FOR_HEIGHT)
orientation = GTK_ORIENTATION_VERTICAL;
else
orientation = GTK_ORIENTATION_HORIZONTAL;
opposite = OPPOSITE_ORIENTATION (orientation);
gtk_widget_measure (viewport->child,
orientation, -1,
&min, &nat,
NULL, NULL);
if (viewport->scroll_policy[orientation] == GTK_SCROLL_MINIMUM)
size[orientation] = min;
else
size[orientation] = nat;
gtk_widget_measure (viewport->child,
opposite, size[orientation],
&min, &nat,
NULL, NULL);
if (viewport->scroll_policy[opposite] == GTK_SCROLL_MINIMUM)
size[opposite] = min;
else
size[opposite] = nat;
}
static void
viewport_set_adjustment_values (GtkViewport *viewport,
GtkOrientation orientation)
{
GtkAdjustment *adjustment;
GtkScrollablePolicy scroll_policy;
GtkScrollablePolicy other_scroll_policy;
GtkOrientation other_orientation;
double upper, value;
int viewport_size, other_viewport_size;
int viewport_size;
int view_width, view_height;
int child_size[2];
view_width = gtk_widget_get_width (GTK_WIDGET (viewport));
view_height = gtk_widget_get_height (GTK_WIDGET (viewport));
@ -161,49 +199,17 @@ viewport_set_adjustment_values (GtkViewport *viewport,
if (orientation == GTK_ORIENTATION_HORIZONTAL)
{
adjustment = viewport->adjustment[GTK_ORIENTATION_HORIZONTAL];
other_orientation = GTK_ORIENTATION_VERTICAL;
viewport_size = view_width;
other_viewport_size = view_height;
scroll_policy = viewport->scroll_policy[GTK_ORIENTATION_HORIZONTAL];
other_scroll_policy = viewport->scroll_policy[GTK_ORIENTATION_VERTICAL];
}
else /* VERTICAL */
{
adjustment = viewport->adjustment[GTK_ORIENTATION_VERTICAL];
other_orientation = GTK_ORIENTATION_HORIZONTAL;
viewport_size = view_height;
other_viewport_size = view_width;
scroll_policy = viewport->scroll_policy[GTK_ORIENTATION_VERTICAL];
other_scroll_policy = viewport->scroll_policy[GTK_ORIENTATION_HORIZONTAL];
}
gtk_viewport_measure_child (viewport, child_size);
if (viewport->child && gtk_widget_get_visible (viewport->child))
{
int min_size, nat_size;
int scroll_size;
if (other_scroll_policy == GTK_SCROLL_MINIMUM)
gtk_widget_measure (viewport->child, other_orientation, -1,
&scroll_size, NULL, NULL, NULL);
else
gtk_widget_measure (viewport->child, other_orientation, -1,
NULL, &scroll_size, NULL, NULL);
gtk_widget_measure (viewport->child, orientation,
MAX (other_viewport_size, scroll_size),
&min_size, &nat_size, NULL, NULL);
if (scroll_policy == GTK_SCROLL_MINIMUM)
upper = MAX (min_size, viewport_size);
else
upper = MAX (nat_size, viewport_size);
}
else
{
upper = viewport_size;
}
upper = MAX (viewport_size, child_size[orientation]);
value = gtk_adjustment_get_value (adjustment);
@ -236,13 +242,12 @@ gtk_viewport_measure (GtkWidget *widget,
int *natural_baseline)
{
GtkViewport *viewport = GTK_VIEWPORT (widget);
int child_size[2];
if (viewport->child)
gtk_widget_measure (viewport->child,
orientation,
for_size,
minimum, natural,
NULL, NULL);
gtk_viewport_measure_child (viewport, child_size);
*minimum = child_size[orientation];
*natural = child_size[orientation];
}
static void
@ -267,12 +272,7 @@ gtk_viewport_compute_expand (GtkWidget *widget,
static GtkSizeRequestMode
gtk_viewport_get_request_mode (GtkWidget *widget)
{
GtkViewport *viewport = GTK_VIEWPORT (widget);
if (viewport->child)
return gtk_widget_get_request_mode (viewport->child);
else
return GTK_SIZE_REQUEST_CONSTANT_SIZE;
return GTK_SIZE_REQUEST_CONSTANT_SIZE;
}
#define ADJUSTMENT_POINTER(orientation) \