forked from AuroraMiddleware/gtk
aspectframe: Derive from GtkWidget
We want to remove GtkBin and GtkContainer as they don't provide much useful functionality anymore. This requires us to move get_request_mode and compute_expand down. We have to implement GtkBuildable, in order to keep the <child> element in ui files working for aspect frames. See #2681
This commit is contained in:
Matthias Clasen
parent
1f63896c6b
commit
5b06b08a0e
@ -48,10 +48,10 @@
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#include "config.h"
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#include "gtkaspectframe.h"
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#include "gtkbin.h"
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#include "gtksizerequest.h"
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#include "gtkwidgetprivate.h"
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#include "gtkprivate.h"
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#include "gtkintl.h"
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@ -60,8 +60,9 @@ typedef struct _GtkAspectFrameClass GtkAspectFrameClass;
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struct _GtkAspectFrame
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{
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GtkBin parent_instance;
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GtkWidget parent_instance;
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GtkWidget *child;
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gboolean obey_child;
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float xalign;
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float yalign;
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@ -70,7 +71,7 @@ struct _GtkAspectFrame
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struct _GtkAspectFrameClass
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{
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GtkBinClass parent_class;
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GtkWidgetClass parent_class;
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};
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enum {
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@ -82,6 +83,7 @@ enum {
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PROP_CHILD
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};
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static void gtk_aspect_frame_dispose (GObject *object);
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static void gtk_aspect_frame_set_property (GObject *object,
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guint prop_id,
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const GValue *value,
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@ -94,11 +96,25 @@ static void gtk_aspect_frame_size_allocate (GtkWidget *widget,
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int width,
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int height,
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int baseline);
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static void gtk_aspect_frame_measure (GtkWidget *widget,
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GtkOrientation orientation,
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int for_size,
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int *minimum,
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int *natural,
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int *minimum_baseline,
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int *natural_baseline);
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static void gtk_aspect_frame_compute_expand (GtkWidget *widget,
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gboolean *hexpand,
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gboolean *vexpand);
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static GtkSizeRequestMode
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gtk_aspect_frame_get_request_mode (GtkWidget *widget);
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#define MAX_RATIO 10000.0
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#define MIN_RATIO 0.0001
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G_DEFINE_TYPE (GtkAspectFrame, gtk_aspect_frame, GTK_TYPE_BIN)
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G_DEFINE_TYPE (GtkAspectFrame, gtk_aspect_frame, GTK_TYPE_WIDGET)
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static void
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gtk_aspect_frame_class_init (GtkAspectFrameClass *class)
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@ -106,10 +122,16 @@ gtk_aspect_frame_class_init (GtkAspectFrameClass *class)
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GObjectClass *gobject_class = G_OBJECT_CLASS (class);
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GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (class);
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gobject_class->dispose = gtk_aspect_frame_dispose;
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gobject_class->set_property = gtk_aspect_frame_set_property;
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gobject_class->get_property = gtk_aspect_frame_get_property;
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widget_class->measure = gtk_aspect_frame_measure;
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widget_class->size_allocate = gtk_aspect_frame_size_allocate;
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widget_class->compute_expand = gtk_aspect_frame_compute_expand;
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widget_class->get_request_mode = gtk_aspect_frame_get_request_mode;
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widget_class->grab_focus = gtk_widget_grab_focus_none;
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widget_class->focus = gtk_widget_focus_child;
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g_object_class_install_property (gobject_class,
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PROP_XALIGN,
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@ -160,6 +182,16 @@ gtk_aspect_frame_init (GtkAspectFrame *self)
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self->obey_child = TRUE;
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}
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static void
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gtk_aspect_frame_dispose (GObject *object)
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{
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GtkAspectFrame *self = GTK_ASPECT_FRAME (object);
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g_clear_pointer (&self->child, gtk_widget_unparent);
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G_OBJECT_CLASS (gtk_aspect_frame_parent_class)->dispose (object);
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}
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static void
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gtk_aspect_frame_set_property (GObject *object,
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guint prop_id,
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@ -438,12 +470,9 @@ static void
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compute_child_allocation (GtkAspectFrame *self,
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GtkAllocation *child_allocation)
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{
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GtkBin *bin = GTK_BIN (self);
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GtkWidget *child;
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gdouble ratio;
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double ratio;
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child = gtk_bin_get_child (bin);
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if (child && gtk_widget_get_visible (child))
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if (self->child && gtk_widget_get_visible (self->child))
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{
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GtkAllocation full_allocation;
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@ -451,10 +480,10 @@ compute_child_allocation (GtkAspectFrame *self,
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{
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GtkRequisition child_requisition;
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gtk_widget_get_preferred_size (child, &child_requisition, NULL);
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gtk_widget_get_preferred_size (self->child, &child_requisition, NULL);
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if (child_requisition.height != 0)
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{
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ratio = ((gdouble) child_requisition.width /
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ratio = ((double) child_requisition.width /
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child_requisition.height);
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if (ratio < MIN_RATIO)
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ratio = MIN_RATIO;
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@ -487,6 +516,36 @@ compute_child_allocation (GtkAspectFrame *self,
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get_full_allocation (self, child_allocation);
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}
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static void
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gtk_aspect_frame_measure (GtkWidget *widget,
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GtkOrientation orientation,
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int for_size,
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int *minimum,
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int *natural,
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int *minimum_baseline,
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int *natural_baseline)
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{
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GtkAspectFrame *self = GTK_ASPECT_FRAME (widget);
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if (self->child && gtk_widget_get_visible (self->child))
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{
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int child_min, child_nat;
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gtk_widget_measure (self->child,
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orientation, for_size,
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&child_min, &child_nat,
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NULL, NULL);
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*minimum = child_min;
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*natural = child_nat;
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}
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else
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{
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*minimum = 0;
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*natural = 0;
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}
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}
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static void
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gtk_aspect_frame_size_allocate (GtkWidget *widget,
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int width,
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@ -494,14 +553,42 @@ gtk_aspect_frame_size_allocate (GtkWidget *widget,
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int baseline)
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{
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GtkAspectFrame *self = GTK_ASPECT_FRAME (widget);
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GtkWidget *child;
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GtkAllocation new_allocation;
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compute_child_allocation (self, &new_allocation);
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child = gtk_bin_get_child (GTK_BIN (widget));
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if (child && gtk_widget_get_visible (child))
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gtk_widget_size_allocate (child, &new_allocation, -1);
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if (self->child && gtk_widget_get_visible (self->child))
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gtk_widget_size_allocate (self->child, &new_allocation, -1);
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}
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static void
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gtk_aspect_frame_compute_expand (GtkWidget *widget,
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gboolean *hexpand,
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gboolean *vexpand)
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{
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GtkAspectFrame *self = GTK_ASPECT_FRAME (widget);
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if (self->child)
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{
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*hexpand = gtk_widget_compute_expand (self->child, GTK_ORIENTATION_HORIZONTAL);
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*vexpand = gtk_widget_compute_expand (self->child, GTK_ORIENTATION_VERTICAL);
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}
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else
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{
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*hexpand = FALSE;
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*vexpand = FALSE;
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}
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}
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static GtkSizeRequestMode
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gtk_aspect_frame_get_request_mode (GtkWidget *widget)
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{
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GtkAspectFrame *self = GTK_ASPECT_FRAME (widget);
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if (self->child)
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return gtk_widget_get_request_mode (self->child);
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else
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return GTK_SIZE_REQUEST_CONSTANT_SIZE;
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}
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/**
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@ -518,7 +605,17 @@ gtk_aspect_frame_set_child (GtkAspectFrame *self,
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g_return_if_fail (GTK_IS_ASPECT_FRAME (self));
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g_return_if_fail (child == NULL || GTK_IS_WIDGET (child));
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_gtk_bin_set_child (GTK_BIN (self), child);
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if (self->child == child)
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return;
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g_clear_pointer (&self->child, gtk_widget_unparent);
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if (child)
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{
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self->child = child;
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gtk_widget_set_parent (child, GTK_WIDGET (self));
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}
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g_object_notify (G_OBJECT (self), "child");
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}
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@ -535,6 +632,6 @@ gtk_aspect_frame_get_child (GtkAspectFrame *self)
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{
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g_return_val_if_fail (GTK_IS_ASPECT_FRAME (self), NULL);
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return gtk_bin_get_child (GTK_BIN (self));
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return self->child;
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}
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