487223d480
What this means is basically that a vertically oriented GtkCellAreaBox will render cells properly even if the height is not constant for every for of data in the said GtkCellAreaContext (i.e. the height was not allocated by gtk_cell_area_context_allocate). This is done completely on the fly and so is much more heavy duty at render time (considerably slower but not visibly noticable in lightweight views like GtkTreeMenu). Note that cell alignments are not possible in an unallocated orientation, each row of data individually receives only enough space to render the independant row and no space is reserved for alignments if the size is not a constant size across rows in the same context.
131 lines
6.1 KiB
C
131 lines
6.1 KiB
C
/* gtkcellareacontext.h
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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, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#if !defined (__GTK_H_INSIDE__) && !defined (GTK_COMPILATION)
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#error "Only <gtk/gtk.h> can be included directly."
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#endif
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#ifndef __GTK_CELL_AREA_CONTEXT_H__
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#define __GTK_CELL_AREA_CONTEXT_H__
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#include <gtk/gtkcellarea.h>
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G_BEGIN_DECLS
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#define GTK_TYPE_CELL_AREA_CONTEXT (gtk_cell_area_context_get_type ())
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#define GTK_CELL_AREA_CONTEXT(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GTK_TYPE_CELL_AREA_CONTEXT, GtkCellAreaContext))
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#define GTK_CELL_AREA_CONTEXT_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GTK_TYPE_CELL_AREA_CONTEXT, GtkCellAreaContextClass))
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#define GTK_IS_CELL_AREA_CONTEXT(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GTK_TYPE_CELL_AREA_CONTEXT))
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#define GTK_IS_CELL_AREA_CONTEXT_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GTK_TYPE_CELL_AREA_CONTEXT))
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#define GTK_CELL_AREA_CONTEXT_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GTK_TYPE_CELL_AREA_CONTEXT, GtkCellAreaContextClass))
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typedef struct _GtkCellAreaContextPrivate GtkCellAreaContextPrivate;
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typedef struct _GtkCellAreaContextClass GtkCellAreaContextClass;
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struct _GtkCellAreaContext
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{
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GObject parent_instance;
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GtkCellAreaContextPrivate *priv;
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};
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struct _GtkCellAreaContextClass
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{
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GObjectClass parent_class;
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/* Subclasses can use this to flush their alignments/allocations */
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void (* flush_preferred_width) (GtkCellAreaContext *context);
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void (* flush_preferred_height_for_width) (GtkCellAreaContext *context,
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gint width);
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void (* flush_preferred_height) (GtkCellAreaContext *context);
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void (* flush_preferred_width_for_height) (GtkCellAreaContext *context,
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gint height);
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void (* flush_allocation) (GtkCellAreaContext *context);
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/* These must be invoked after a series of requests before consulting
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* the context values, implementors use this to push the overall
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* requests while acconting for any internal alignments */
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void (* sum_preferred_width) (GtkCellAreaContext *context);
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void (* sum_preferred_height_for_width) (GtkCellAreaContext *context,
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gint width);
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void (* sum_preferred_height) (GtkCellAreaContext *context);
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void (* sum_preferred_width_for_height) (GtkCellAreaContext *context,
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gint height);
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/* Store an allocation value for a GtkCellArea contextual to a range of
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* treemodel rows */
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void (* allocate) (GtkCellAreaContext *context,
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gint width,
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gint height);
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/* Padding for future expansion */
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void (*_gtk_reserved1) (void);
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void (*_gtk_reserved2) (void);
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void (*_gtk_reserved3) (void);
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void (*_gtk_reserved4) (void);
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};
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GType gtk_cell_area_context_get_type (void) G_GNUC_CONST;
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GtkCellArea *gtk_cell_area_context_get_area (GtkCellAreaContext *context);
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/* Apis for GtkCellArea clients to flush the cache */
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void gtk_cell_area_context_flush (GtkCellAreaContext *context);
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void gtk_cell_area_context_flush_preferred_width (GtkCellAreaContext *context);
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void gtk_cell_area_context_flush_preferred_height (GtkCellAreaContext *context);
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void gtk_cell_area_context_flush_allocation (GtkCellAreaContext *context);
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/* Apis for GtkCellArea clients to sum up the results of a series of requests, this
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* call is required to reduce the processing while calculating the size of each row */
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void gtk_cell_area_context_sum_preferred_width (GtkCellAreaContext *context);
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void gtk_cell_area_context_sum_preferred_height (GtkCellAreaContext *context);
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/* Apis to set an allocation size in one dimension or another, the subclass specific context
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* will store allocated positions/sizes for individual cells or groups of cells */
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void gtk_cell_area_context_allocate (GtkCellAreaContext *context,
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gint width,
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gint height);
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/* Apis for GtkCellArea clients to consult cached values for multiple GtkTreeModel rows */
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void gtk_cell_area_context_get_preferred_width (GtkCellAreaContext *context,
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gint *minimum_width,
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gint *natural_width);
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void gtk_cell_area_context_get_preferred_height (GtkCellAreaContext *context,
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gint *minimum_height,
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gint *natural_height);
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void gtk_cell_area_context_get_allocation (GtkCellAreaContext *context,
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gint *width,
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gint *height);
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/* Apis for GtkCellArea implementations to update cached values for multiple GtkTreeModel rows */
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void gtk_cell_area_context_push_preferred_width (GtkCellAreaContext *context,
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gint minimum_width,
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gint natural_width);
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void gtk_cell_area_context_push_preferred_height (GtkCellAreaContext *context,
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gint minimum_height,
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gint natural_height);
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G_END_DECLS
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#endif /* __GTK_CELL_AREA_CONTEXT_H__ */
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