forked from AuroraMiddleware/gtk
a546ae32d7
Those property features don't seem to be in use anywhere. They are redundant since the docs cover the same information and more. They also created unnecessary translation work. Closes #4904
608 lines
22 KiB
C
608 lines
22 KiB
C
/* gtkcellareacontext.c
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*
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* Copyright (C) 2010 Openismus GmbH
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*
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* Authors:
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* Tristan Van Berkom <tristanvb@openismus.com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library. If not, see <http://www.gnu.org/licenses/>.
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*/
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/**
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* GtkCellAreaContext:
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*
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* Stores geometrical information for a series of rows in a GtkCellArea
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*
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* The `GtkCellAreaContext` object is created by a given `GtkCellArea`
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* implementation via its `GtkCellAreaClass.create_context()` virtual
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* method and is used to store cell sizes and alignments for a series of
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* `GtkTreeModel` rows that are requested and rendered in the same context.
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*
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* `GtkCellLayout` widgets can create any number of contexts in which to
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* request and render groups of data rows. However, it’s important that the
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* same context which was used to request sizes for a given `GtkTreeModel`
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* row also be used for the same row when calling other `GtkCellArea` APIs
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* such as gtk_cell_area_render() and gtk_cell_area_event().
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*/
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#include "config.h"
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#include "gtkintl.h"
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#include "gtkmarshalers.h"
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#include "gtkcellareacontext.h"
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#include "gtkprivate.h"
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/* GObjectClass */
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static void gtk_cell_area_context_dispose (GObject *object);
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static void gtk_cell_area_context_get_property (GObject *object,
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guint prop_id,
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GValue *value,
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GParamSpec *pspec);
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static void gtk_cell_area_context_set_property (GObject *object,
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guint prop_id,
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const GValue *value,
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GParamSpec *pspec);
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/* GtkCellAreaContextClass */
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static void gtk_cell_area_context_real_reset (GtkCellAreaContext *context);
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static void gtk_cell_area_context_real_allocate (GtkCellAreaContext *context,
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int width,
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int height);
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typedef struct _GtkCellAreaContextPrivate GtkCellAreaContextPrivate;
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struct _GtkCellAreaContextPrivate
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{
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GtkCellArea *cell_area;
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int min_width;
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int nat_width;
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int min_height;
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int nat_height;
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int alloc_width;
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int alloc_height;
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};
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enum {
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PROP_0,
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PROP_CELL_AREA,
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PROP_MIN_WIDTH,
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PROP_NAT_WIDTH,
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PROP_MIN_HEIGHT,
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PROP_NAT_HEIGHT
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};
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G_DEFINE_TYPE_WITH_PRIVATE (GtkCellAreaContext, gtk_cell_area_context, G_TYPE_OBJECT)
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static void
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gtk_cell_area_context_init (GtkCellAreaContext *context)
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{
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}
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static void
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gtk_cell_area_context_class_init (GtkCellAreaContextClass *class)
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{
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GObjectClass *object_class = G_OBJECT_CLASS (class);
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/* GObjectClass */
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object_class->dispose = gtk_cell_area_context_dispose;
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object_class->get_property = gtk_cell_area_context_get_property;
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object_class->set_property = gtk_cell_area_context_set_property;
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/* GtkCellAreaContextClass */
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class->reset = gtk_cell_area_context_real_reset;
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class->allocate = gtk_cell_area_context_real_allocate;
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/**
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* GtkCellAreaContext:area:
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*
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* The `GtkCellArea` this context was created by
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*/
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g_object_class_install_property (object_class,
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PROP_CELL_AREA,
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g_param_spec_object ("area", NULL, NULL,
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GTK_TYPE_CELL_AREA,
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GTK_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY));
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/**
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* GtkCellAreaContext:minimum-width:
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*
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* The minimum width for the `GtkCellArea` in this context
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* for all `GtkTreeModel` rows that this context was requested
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* for using gtk_cell_area_get_preferred_width().
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*/
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g_object_class_install_property (object_class,
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PROP_MIN_WIDTH,
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g_param_spec_int ("minimum-width", NULL, NULL,
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-1, G_MAXINT, -1,
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GTK_PARAM_READABLE));
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/**
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* GtkCellAreaContext:natural-width:
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*
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* The natural width for the `GtkCellArea` in this context
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* for all `GtkTreeModel` rows that this context was requested
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* for using gtk_cell_area_get_preferred_width().
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*/
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g_object_class_install_property (object_class,
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PROP_NAT_WIDTH,
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g_param_spec_int ("natural-width", NULL, NULL,
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-1, G_MAXINT, -1,
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GTK_PARAM_READABLE));
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/**
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* GtkCellAreaContext:minimum-height:
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*
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* The minimum height for the `GtkCellArea` in this context
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* for all `GtkTreeModel` rows that this context was requested
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* for using gtk_cell_area_get_preferred_height().
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*/
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g_object_class_install_property (object_class,
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PROP_MIN_HEIGHT,
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g_param_spec_int ("minimum-height", NULL, NULL,
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-1, G_MAXINT, -1,
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GTK_PARAM_READABLE));
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/**
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* GtkCellAreaContext:natural-height:
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*
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* The natural height for the `GtkCellArea` in this context
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* for all `GtkTreeModel` rows that this context was requested
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* for using gtk_cell_area_get_preferred_height().
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*/
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g_object_class_install_property (object_class,
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PROP_NAT_HEIGHT,
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g_param_spec_int ("natural-height", NULL, NULL,
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-1, G_MAXINT, -1,
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GTK_PARAM_READABLE));
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}
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/*************************************************************
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* GObjectClass *
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*************************************************************/
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static void
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gtk_cell_area_context_dispose (GObject *object)
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{
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GtkCellAreaContext *context = GTK_CELL_AREA_CONTEXT (object);
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GtkCellAreaContextPrivate *priv = gtk_cell_area_context_get_instance_private (context);
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if (priv->cell_area)
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{
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g_object_unref (priv->cell_area);
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priv->cell_area = NULL;
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}
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G_OBJECT_CLASS (gtk_cell_area_context_parent_class)->dispose (object);
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}
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static void
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gtk_cell_area_context_set_property (GObject *object,
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guint prop_id,
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const GValue *value,
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GParamSpec *pspec)
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{
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GtkCellAreaContext *context = GTK_CELL_AREA_CONTEXT (object);
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GtkCellAreaContextPrivate *priv = gtk_cell_area_context_get_instance_private (context);
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switch (prop_id)
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{
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case PROP_CELL_AREA:
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priv->cell_area = g_value_dup_object (value);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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}
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static void
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gtk_cell_area_context_get_property (GObject *object,
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guint prop_id,
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GValue *value,
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GParamSpec *pspec)
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{
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GtkCellAreaContext *context = GTK_CELL_AREA_CONTEXT (object);
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GtkCellAreaContextPrivate *priv = gtk_cell_area_context_get_instance_private (context);
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switch (prop_id)
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{
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case PROP_CELL_AREA:
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g_value_set_object (value, priv->cell_area);
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break;
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case PROP_MIN_WIDTH:
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g_value_set_int (value, priv->min_width);
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break;
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case PROP_NAT_WIDTH:
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g_value_set_int (value, priv->nat_width);
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break;
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case PROP_MIN_HEIGHT:
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g_value_set_int (value, priv->min_height);
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break;
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case PROP_NAT_HEIGHT:
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g_value_set_int (value, priv->nat_height);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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}
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/*************************************************************
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* GtkCellAreaContextClass *
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*************************************************************/
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static void
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gtk_cell_area_context_real_reset (GtkCellAreaContext *context)
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{
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GtkCellAreaContextPrivate *priv = gtk_cell_area_context_get_instance_private (context);
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g_object_freeze_notify (G_OBJECT (context));
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if (priv->min_width != 0)
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{
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priv->min_width = 0;
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g_object_notify (G_OBJECT (context), "minimum-width");
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}
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if (priv->nat_width != 0)
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{
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priv->nat_width = 0;
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g_object_notify (G_OBJECT (context), "natural-width");
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}
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if (priv->min_height != 0)
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{
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priv->min_height = 0;
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g_object_notify (G_OBJECT (context), "minimum-height");
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}
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if (priv->nat_height != 0)
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{
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priv->nat_height = 0;
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g_object_notify (G_OBJECT (context), "natural-height");
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}
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priv->alloc_width = 0;
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priv->alloc_height = 0;
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g_object_thaw_notify (G_OBJECT (context));
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}
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static void
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gtk_cell_area_context_real_allocate (GtkCellAreaContext *context,
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int width,
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int height)
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{
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GtkCellAreaContextPrivate *priv = gtk_cell_area_context_get_instance_private (context);
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priv->alloc_width = width;
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priv->alloc_height = height;
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}
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/*************************************************************
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* API *
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*************************************************************/
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/**
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* gtk_cell_area_context_get_area:
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* @context: a `GtkCellAreaContext`
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*
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* Fetches the `GtkCellArea` this @context was created by.
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*
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* This is generally unneeded by layouting widgets; however,
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* it is important for the context implementation itself to
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* fetch information about the area it is being used for.
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*
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* For instance at `GtkCellAreaContextClass.allocate()` time
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* it’s important to know details about any cell spacing
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* that the `GtkCellArea` is configured with in order to
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* compute a proper allocation.
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*
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* Returns: (transfer none): the `GtkCellArea` this context was created by.
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*/
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GtkCellArea *
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gtk_cell_area_context_get_area (GtkCellAreaContext *context)
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{
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GtkCellAreaContextPrivate *priv = gtk_cell_area_context_get_instance_private (context);
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g_return_val_if_fail (GTK_IS_CELL_AREA_CONTEXT (context), NULL);
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return priv->cell_area;
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}
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/**
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* gtk_cell_area_context_reset:
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* @context: a `GtkCellAreaContext`
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*
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* Resets any previously cached request and allocation
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* data.
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*
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* When underlying `GtkTreeModel` data changes its
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* important to reset the context if the content
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* size is allowed to shrink. If the content size
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* is only allowed to grow (this is usually an option
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* for views rendering large data stores as a measure
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* of optimization), then only the row that changed
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* or was inserted needs to be (re)requested with
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* gtk_cell_area_get_preferred_width().
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*
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* When the new overall size of the context requires
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* that the allocated size changes (or whenever this
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* allocation changes at all), the variable row
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* sizes need to be re-requested for every row.
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*
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* For instance, if the rows are displayed all with
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* the same width from top to bottom then a change
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* in the allocated width necessitates a recalculation
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* of all the displayed row heights using
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* gtk_cell_area_get_preferred_height_for_width().
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*/
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void
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gtk_cell_area_context_reset (GtkCellAreaContext *context)
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{
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g_return_if_fail (GTK_IS_CELL_AREA_CONTEXT (context));
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GTK_CELL_AREA_CONTEXT_GET_CLASS (context)->reset (context);
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}
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/**
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* gtk_cell_area_context_allocate:
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* @context: a `GtkCellAreaContext`
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* @width: the allocated width for all `GtkTreeModel` rows rendered
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* with @context, or -1
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* @height: the allocated height for all `GtkTreeModel` rows rendered
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* with @context, or -1
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*
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* Allocates a width and/or a height for all rows which are to be
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* rendered with @context.
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*
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* Usually allocation is performed only horizontally or sometimes
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* vertically since a group of rows are usually rendered side by
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* side vertically or horizontally and share either the same width
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* or the same height. Sometimes they are allocated in both horizontal
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* and vertical orientations producing a homogeneous effect of the
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* rows. This is generally the case for `GtkTreeView` when
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* `GtkTreeView:fixed-height-mode` is enabled.
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*/
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void
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gtk_cell_area_context_allocate (GtkCellAreaContext *context,
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int width,
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int height)
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{
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g_return_if_fail (GTK_IS_CELL_AREA_CONTEXT (context));
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GTK_CELL_AREA_CONTEXT_GET_CLASS (context)->allocate (context, width, height);
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}
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/**
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* gtk_cell_area_context_get_preferred_width:
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* @context: a `GtkCellAreaContext`
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* @minimum_width: (out) (optional): location to store the minimum width
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* @natural_width: (out) (optional): location to store the natural width
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*
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* Gets the accumulative preferred width for all rows which have been
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* requested with this context.
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*
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* After gtk_cell_area_context_reset() is called and/or before ever
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* requesting the size of a `GtkCellArea`, the returned values are 0.
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*/
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void
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gtk_cell_area_context_get_preferred_width (GtkCellAreaContext *context,
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int *minimum_width,
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int *natural_width)
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{
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GtkCellAreaContextPrivate *priv = gtk_cell_area_context_get_instance_private (context);
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g_return_if_fail (GTK_IS_CELL_AREA_CONTEXT (context));
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if (minimum_width)
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*minimum_width = priv->min_width;
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if (natural_width)
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*natural_width = priv->nat_width;
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}
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/**
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* gtk_cell_area_context_get_preferred_height:
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* @context: a `GtkCellAreaContext`
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* @minimum_height: (out) (optional): location to store the minimum height
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* @natural_height: (out) (optional): location to store the natural height
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*
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* Gets the accumulative preferred height for all rows which have been
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* requested with this context.
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*
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* After gtk_cell_area_context_reset() is called and/or before ever
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* requesting the size of a `GtkCellArea`, the returned values are 0.
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*/
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void
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gtk_cell_area_context_get_preferred_height (GtkCellAreaContext *context,
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int *minimum_height,
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int *natural_height)
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{
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GtkCellAreaContextPrivate *priv = gtk_cell_area_context_get_instance_private (context);
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g_return_if_fail (GTK_IS_CELL_AREA_CONTEXT (context));
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if (minimum_height)
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*minimum_height = priv->min_height;
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if (natural_height)
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*natural_height = priv->nat_height;
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}
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/**
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* gtk_cell_area_context_get_preferred_height_for_width:
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* @context: a `GtkCellAreaContext`
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* @width: a proposed width for allocation
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* @minimum_height: (out) (optional): location to store the minimum height
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* @natural_height: (out) (optional): location to store the natural height
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*
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* Gets the accumulative preferred height for @width for all rows
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* which have been requested for the same said @width with this context.
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*
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* After gtk_cell_area_context_reset() is called and/or before ever
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* requesting the size of a `GtkCellArea`, the returned values are -1.
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*/
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void
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gtk_cell_area_context_get_preferred_height_for_width (GtkCellAreaContext *context,
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int width,
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int *minimum_height,
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int *natural_height)
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{
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g_return_if_fail (GTK_IS_CELL_AREA_CONTEXT (context));
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if (GTK_CELL_AREA_CONTEXT_GET_CLASS (context)->get_preferred_height_for_width)
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GTK_CELL_AREA_CONTEXT_GET_CLASS (context)->get_preferred_height_for_width (context,
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width,
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minimum_height,
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natural_height);
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}
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/**
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* gtk_cell_area_context_get_preferred_width_for_height:
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* @context: a `GtkCellAreaContext`
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* @height: a proposed height for allocation
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* @minimum_width: (out) (optional): location to store the minimum width
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* @natural_width: (out) (optional): location to store the natural width
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*
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* Gets the accumulative preferred width for @height for all rows which
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* have been requested for the same said @height with this context.
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*
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* After gtk_cell_area_context_reset() is called and/or before ever
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* requesting the size of a `GtkCellArea`, the returned values are -1.
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*/
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void
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gtk_cell_area_context_get_preferred_width_for_height (GtkCellAreaContext *context,
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int height,
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int *minimum_width,
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int *natural_width)
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{
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g_return_if_fail (GTK_IS_CELL_AREA_CONTEXT (context));
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if (GTK_CELL_AREA_CONTEXT_GET_CLASS (context)->get_preferred_width_for_height)
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GTK_CELL_AREA_CONTEXT_GET_CLASS (context)->get_preferred_width_for_height (context,
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height,
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minimum_width,
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natural_width);
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}
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/**
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* gtk_cell_area_context_get_allocation:
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||
* @context: a `GtkCellAreaContext`
|
||
* @width: (out) (optional): location to store the allocated width
|
||
* @height: (out) (optional): location to store the allocated height
|
||
*
|
||
* Fetches the current allocation size for @context.
|
||
*
|
||
* If the context was not allocated in width or height, or if the
|
||
* context was recently reset with gtk_cell_area_context_reset(),
|
||
* the returned value will be -1.
|
||
*/
|
||
void
|
||
gtk_cell_area_context_get_allocation (GtkCellAreaContext *context,
|
||
int *width,
|
||
int *height)
|
||
{
|
||
GtkCellAreaContextPrivate *priv = gtk_cell_area_context_get_instance_private (context);
|
||
|
||
g_return_if_fail (GTK_IS_CELL_AREA_CONTEXT (context));
|
||
|
||
if (width)
|
||
*width = priv->alloc_width;
|
||
|
||
if (height)
|
||
*height = priv->alloc_height;
|
||
}
|
||
|
||
/**
|
||
* gtk_cell_area_context_push_preferred_width:
|
||
* @context: a `GtkCellAreaContext`
|
||
* @minimum_width: the proposed new minimum width for @context
|
||
* @natural_width: the proposed new natural width for @context
|
||
*
|
||
* Causes the minimum and/or natural width to grow if the new
|
||
* proposed sizes exceed the current minimum and natural width.
|
||
*
|
||
* This is used by `GtkCellAreaContext` implementations during
|
||
* the request process over a series of `GtkTreeModel` rows to
|
||
* progressively push the requested width over a series of
|
||
* gtk_cell_area_get_preferred_width() requests.
|
||
*/
|
||
void
|
||
gtk_cell_area_context_push_preferred_width (GtkCellAreaContext *context,
|
||
int minimum_width,
|
||
int natural_width)
|
||
{
|
||
GtkCellAreaContextPrivate *priv = gtk_cell_area_context_get_instance_private (context);
|
||
|
||
g_return_if_fail (GTK_IS_CELL_AREA_CONTEXT (context));
|
||
|
||
g_object_freeze_notify (G_OBJECT (context));
|
||
|
||
if (minimum_width > priv->min_width)
|
||
{
|
||
priv->min_width = minimum_width;
|
||
|
||
g_object_notify (G_OBJECT (context), "minimum-width");
|
||
}
|
||
|
||
if (natural_width > priv->nat_width)
|
||
{
|
||
priv->nat_width = natural_width;
|
||
|
||
g_object_notify (G_OBJECT (context), "natural-width");
|
||
}
|
||
|
||
g_object_thaw_notify (G_OBJECT (context));
|
||
}
|
||
|
||
/**
|
||
* gtk_cell_area_context_push_preferred_height:
|
||
* @context: a `GtkCellAreaContext`
|
||
* @minimum_height: the proposed new minimum height for @context
|
||
* @natural_height: the proposed new natural height for @context
|
||
*
|
||
* Causes the minimum and/or natural height to grow if the new
|
||
* proposed sizes exceed the current minimum and natural height.
|
||
*
|
||
* This is used by `GtkCellAreaContext` implementations during
|
||
* the request process over a series of `GtkTreeModel` rows to
|
||
* progressively push the requested height over a series of
|
||
* gtk_cell_area_get_preferred_height() requests.
|
||
*/
|
||
void
|
||
gtk_cell_area_context_push_preferred_height (GtkCellAreaContext *context,
|
||
int minimum_height,
|
||
int natural_height)
|
||
{
|
||
GtkCellAreaContextPrivate *priv = gtk_cell_area_context_get_instance_private (context);
|
||
|
||
g_return_if_fail (GTK_IS_CELL_AREA_CONTEXT (context));
|
||
|
||
g_object_freeze_notify (G_OBJECT (context));
|
||
|
||
if (minimum_height > priv->min_height)
|
||
{
|
||
priv->min_height = minimum_height;
|
||
|
||
g_object_notify (G_OBJECT (context), "minimum-height");
|
||
}
|
||
|
||
if (natural_height > priv->nat_height)
|
||
{
|
||
priv->nat_height = natural_height;
|
||
|
||
g_object_notify (G_OBJECT (context), "natural-height");
|
||
}
|
||
|
||
g_object_thaw_notify (G_OBJECT (context));
|
||
}
|