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Make the browser implement its own scrollable

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It's quite rough around the edges so far.
This commit is contained in:
Přemysl Eric Janouch
2022-01-09 10:09:06 +01:00
parent 3bf41993a3
commit 1a190001fc
2 changed files with 114 additions and 10 deletions
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119
fiv-browser.c
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@@ -54,6 +54,10 @@ typedef struct _Thumbnailer {
struct _FivBrowser {
GtkWidget parent_instance;
GtkAdjustment *hadjustment; ///< GtkScrollable boilerplate
GtkAdjustment *vadjustment; ///< GtkScrollable boilerplate
GtkScrollablePolicy hscroll_policy; ///< GtkScrollable boilerplate
GtkScrollablePolicy vscroll_policy; ///< GtkScrollable boilerplate
FivThumbnailSize item_size; ///< Thumbnail size
int item_height; ///< Thumbnail height in pixels
@@ -170,7 +174,21 @@ relayout(FivBrowser *self, int width)
}
g_array_free(items, TRUE);
return y + padding.bottom;
int total_height = y + padding.bottom;
if (self->hadjustment) {
// TODO(p): Set it to the width. Ideally, bump it to the minimum width.
}
if (self->vadjustment) {
gtk_adjustment_set_lower(self->vadjustment, 0);
gtk_adjustment_set_upper(self->vadjustment, total_height);
gtk_adjustment_set_page_size(
self->vadjustment, gtk_widget_get_allocated_height(widget));
gtk_adjustment_set_page_increment(
self->vadjustment, gtk_widget_get_allocated_height(widget));
gtk_adjustment_set_step_increment(self->vadjustment,
self->item_height + self->item_spacing + 2 * self->item_border_y);
}
return total_height;
}
static void
@@ -225,6 +243,9 @@ item_extents(FivBrowser *self, const Item *item, const Row *row)
static const Entry *
entry_at(FivBrowser *self, int x, int y)
{
if (self->vadjustment)
y += gtk_adjustment_get_value(self->vadjustment);
for (guint i = 0; i < self->layouted_rows->len; i++) {
const Row *row = &g_array_index(self->layouted_rows, Row, i);
for (Item *item = row->items; item->entry; item++) {
@@ -748,14 +769,18 @@ show_context_menu(GtkWidget *widget, GFile *file)
// --- Boilerplate -------------------------------------------------------------
// TODO(p): For proper navigation, we need to implement GtkScrollable.
G_DEFINE_TYPE_EXTENDED(FivBrowser, fiv_browser, GTK_TYPE_WIDGET, 0,
/* G_IMPLEMENT_INTERFACE(GTK_TYPE_SCROLLABLE,
fiv_browser_scrollable_init) */)
G_IMPLEMENT_INTERFACE(GTK_TYPE_SCROLLABLE, NULL))
enum {
PROP_THUMBNAIL_SIZE = 1,
N_PROPERTIES
N_PROPERTIES,
// These are overriden, we do not register them.
PROP_HADJUSTMENT,
PROP_VADJUSTMENT,
PROP_HSCROLL_POLICY,
PROP_VSCROLL_POLICY,
};
static GParamSpec *browser_properties[N_PROPERTIES];
@@ -768,6 +793,35 @@ enum {
// Globals are, sadly, the canonical way of storing signal numbers.
static guint browser_signals[LAST_SIGNAL];
static void
on_adjustment_value_changed(
G_GNUC_UNUSED GtkAdjustment *adjustment, gpointer user_data)
{
FivBrowser *self = FIV_BROWSER(user_data);
gtk_widget_queue_draw(GTK_WIDGET(self));
}
static gboolean
replace_adjustment(
FivBrowser *self, GtkAdjustment **adjustment, GtkAdjustment *replacement)
{
if (*adjustment == replacement)
return FALSE;
if (*adjustment) {
g_signal_handlers_disconnect_by_func(
*adjustment, on_adjustment_value_changed, self);
g_clear_object(adjustment);
}
if (replacement) {
*adjustment = g_object_ref(replacement);
g_signal_connect(*adjustment, "value-changed",
G_CALLBACK(on_adjustment_value_changed), self);
// TODO(p): We should set it up, as it is done in relayout().
}
return TRUE;
}
static void
fiv_browser_finalize(GObject *gobject)
{
@@ -783,6 +837,9 @@ fiv_browser_finalize(GObject *gobject)
cairo_surface_destroy(self->glow);
g_clear_object(&self->pointer);
replace_adjustment(self, &self->hadjustment, NULL);
replace_adjustment(self, &self->vadjustment, NULL);
G_OBJECT_CLASS(fiv_browser_parent_class)->finalize(gobject);
}
@@ -795,6 +852,18 @@ fiv_browser_get_property(
case PROP_THUMBNAIL_SIZE:
g_value_set_enum(value, self->item_size);
break;
case PROP_HADJUSTMENT:
g_value_set_object(value, self->hadjustment);
break;
case PROP_VADJUSTMENT:
g_value_set_object(value, self->vadjustment);
break;
case PROP_HSCROLL_POLICY:
g_value_set_enum(value, self->hscroll_policy);
break;
case PROP_VSCROLL_POLICY:
g_value_set_enum(value, self->vscroll_policy);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID(object, property_id, pspec);
}
@@ -825,6 +894,30 @@ fiv_browser_set_property(
case PROP_THUMBNAIL_SIZE:
set_item_size(self, g_value_get_enum(value));
break;
case PROP_HADJUSTMENT:
if (replace_adjustment(
self, &self->hadjustment, g_value_get_object(value)))
g_object_notify_by_pspec(object, pspec);
break;
case PROP_VADJUSTMENT:
if (replace_adjustment(
self, &self->vadjustment, g_value_get_object(value)))
g_object_notify_by_pspec(object, pspec);
break;
case PROP_HSCROLL_POLICY:
if ((gint) self->hscroll_policy != g_value_get_enum(value)) {
self->hscroll_policy = g_value_get_enum(value);
gtk_widget_queue_resize(GTK_WIDGET(self));
g_object_notify_by_pspec(object, pspec);
}
break;
case PROP_VSCROLL_POLICY:
if ((gint) self->vscroll_policy != g_value_get_enum(value)) {
self->vscroll_policy = g_value_get_enum(value);
gtk_widget_queue_resize(GTK_WIDGET(self));
g_object_notify_by_pspec(object, pspec);
}
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID(object, property_id, pspec);
}
@@ -899,6 +992,7 @@ fiv_browser_size_allocate(GtkWidget *widget, GtkAllocation *allocation)
GTK_WIDGET_CLASS(fiv_browser_parent_class)
->size_allocate(widget, allocation);
// TODO(p): Update adjustments so that blank space is avoided.
relayout(FIV_BROWSER(widget), allocation->width);
}
@@ -914,6 +1008,12 @@ fiv_browser_draw(GtkWidget *widget, cairo_t *cr)
gtk_render_background(gtk_widget_get_style_context(widget), cr, 0, 0,
allocation.width, allocation.height);
// TODO(p): self->hadjustment as well, and test it.
if (self->vadjustment) {
gdouble y = gtk_adjustment_get_value(self->vadjustment);
cairo_translate(cr, 0, -y);
}
GdkRectangle clip = {};
gboolean have_clip = gdk_cairo_get_clip_rectangle(cr, &clip);
@@ -1129,6 +1229,15 @@ fiv_browser_class_init(FivBrowserClass *klass)
g_object_class_install_properties(
object_class, N_PROPERTIES, browser_properties);
g_object_class_override_property(
object_class, PROP_HADJUSTMENT, "hadjustment");
g_object_class_override_property(
object_class, PROP_VADJUSTMENT, "vadjustment");
g_object_class_override_property(
object_class, PROP_HSCROLL_POLICY, "hscroll-policy");
g_object_class_override_property(
object_class, PROP_VSCROLL_POLICY, "vscroll-policy");
browser_signals[ITEM_ACTIVATED] = g_signal_new("item-activated",
G_TYPE_FROM_CLASS(klass), 0, 0, NULL, NULL, NULL,
G_TYPE_NONE, 2, G_TYPE_FILE, GTK_TYPE_PLACES_OPEN_FLAGS);