740 lines
22 KiB
C
740 lines
22 KiB
C
/* gtkcellrendererprogress.c
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* Copyright (C) 2002 Naba Kumar <kh_naba@users.sourceforge.net>
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* heavily modified by Jörgen Scheibengruber <mfcn@gmx.de>
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* heavily modified by Marco Pesenti Gritti <marco@gnome.org>
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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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* Modified by the GTK+ Team and others 1997-2007. See the AUTHORS
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* file for a list of people on the GTK+ Team. See the ChangeLog
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* files for a list of changes. These files are distributed with
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* GTK+ at ftp://ftp.gtk.org/pub/gtk/.
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*/
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#include "config.h"
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#include <stdlib.h>
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#include "gtkcellrendererprogress.h"
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#include "gtkintl.h"
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#include "gtkorientable.h"
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#include "gtkprivate.h"
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#include "gtkrender.h"
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/**
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* SECTION:gtkcellrendererprogress
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* @Short_description: Renders numbers as progress bars
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* @Title: GtkCellRendererProgress
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*
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* #GtkCellRendererProgress renders a numeric value as a progress par in a cell.
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* Additionally, it can display a text on top of the progress bar.
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*
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* The #GtkCellRendererProgress cell renderer was added in GTK+ 2.6.
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*/
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enum
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{
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PROP_0,
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PROP_VALUE,
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PROP_TEXT,
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PROP_PULSE,
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PROP_TEXT_XALIGN,
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PROP_TEXT_YALIGN,
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PROP_ORIENTATION,
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PROP_INVERTED
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};
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struct _GtkCellRendererProgressPrivate
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{
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gint value;
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gchar *text;
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gchar *label;
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gint min_h;
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gint min_w;
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gint pulse;
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gint offset;
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gfloat text_xalign;
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gfloat text_yalign;
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GtkOrientation orientation;
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gboolean inverted;
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};
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static void gtk_cell_renderer_progress_finalize (GObject *object);
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static void gtk_cell_renderer_progress_get_property (GObject *object,
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guint param_id,
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GValue *value,
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GParamSpec *pspec);
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static void gtk_cell_renderer_progress_set_property (GObject *object,
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guint param_id,
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const GValue *value,
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GParamSpec *pspec);
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static void gtk_cell_renderer_progress_set_value (GtkCellRendererProgress *cellprogress,
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gint value);
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static void gtk_cell_renderer_progress_set_text (GtkCellRendererProgress *cellprogress,
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const gchar *text);
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static void gtk_cell_renderer_progress_set_pulse (GtkCellRendererProgress *cellprogress,
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gint pulse);
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static void compute_dimensions (GtkCellRenderer *cell,
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GtkWidget *widget,
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const gchar *text,
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gint *width,
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gint *height);
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static void gtk_cell_renderer_progress_get_size (GtkCellRenderer *cell,
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GtkWidget *widget,
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const GdkRectangle *cell_area,
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gint *x_offset,
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gint *y_offset,
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gint *width,
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gint *height);
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static void gtk_cell_renderer_progress_render (GtkCellRenderer *cell,
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cairo_t *cr,
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GtkWidget *widget,
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const GdkRectangle *background_area,
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const GdkRectangle *cell_area,
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GtkCellRendererState flags);
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G_DEFINE_TYPE_WITH_CODE (GtkCellRendererProgress, gtk_cell_renderer_progress, GTK_TYPE_CELL_RENDERER,
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G_ADD_PRIVATE (GtkCellRendererProgress)
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G_IMPLEMENT_INTERFACE (GTK_TYPE_ORIENTABLE, NULL))
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static void
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gtk_cell_renderer_progress_class_init (GtkCellRendererProgressClass *klass)
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{
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GObjectClass *object_class = G_OBJECT_CLASS (klass);
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GtkCellRendererClass *cell_class = GTK_CELL_RENDERER_CLASS (klass);
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object_class->finalize = gtk_cell_renderer_progress_finalize;
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object_class->get_property = gtk_cell_renderer_progress_get_property;
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object_class->set_property = gtk_cell_renderer_progress_set_property;
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cell_class->get_size = gtk_cell_renderer_progress_get_size;
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cell_class->render = gtk_cell_renderer_progress_render;
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/**
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* GtkCellRendererProgress:value:
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*
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* The "value" property determines the percentage to which the
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* progress bar will be "filled in".
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*
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* Since: 2.6
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**/
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g_object_class_install_property (object_class,
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PROP_VALUE,
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g_param_spec_int ("value",
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P_("Value"),
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P_("Value of the progress bar"),
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0, 100, 0,
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GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY));
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/**
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* GtkCellRendererProgress:text:
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*
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* The "text" property determines the label which will be drawn
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* over the progress bar. Setting this property to %NULL causes the default
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* label to be displayed. Setting this property to an empty string causes
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* no label to be displayed.
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*
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* Since: 2.6
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**/
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g_object_class_install_property (object_class,
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PROP_TEXT,
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g_param_spec_string ("text",
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P_("Text"),
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P_("Text on the progress bar"),
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NULL,
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GTK_PARAM_READWRITE));
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/**
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* GtkCellRendererProgress:pulse:
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*
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* Setting this to a non-negative value causes the cell renderer to
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* enter "activity mode", where a block bounces back and forth to
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* indicate that some progress is made, without specifying exactly how
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* much.
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*
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* Each increment of the property causes the block to move by a little
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* bit.
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*
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* To indicate that the activity has not started yet, set the property
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* to zero. To indicate completion, set the property to %G_MAXINT.
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*
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* Since: 2.12
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*/
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g_object_class_install_property (object_class,
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PROP_PULSE,
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g_param_spec_int ("pulse",
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P_("Pulse"),
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P_("Set this to positive values to indicate that some progress is made, but you don't know how much."),
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-1, G_MAXINT, -1,
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GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY));
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/**
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* GtkCellRendererProgress:text-xalign:
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*
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* The "text-xalign" property controls the horizontal alignment of the
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* text in the progress bar. Valid values range from 0 (left) to 1
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* (right). Reserved for RTL layouts.
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*
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* Since: 2.12
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*/
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g_object_class_install_property (object_class,
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PROP_TEXT_XALIGN,
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g_param_spec_float ("text-xalign",
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P_("Text x alignment"),
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P_("The horizontal text alignment, from 0 (left) to 1 (right). Reversed for RTL layouts."),
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0.0, 1.0, 0.5,
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GTK_PARAM_READWRITE));
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/**
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* GtkCellRendererProgress:text-yalign:
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*
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* The "text-yalign" property controls the vertical alignment of the
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* text in the progress bar. Valid values range from 0 (top) to 1
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* (bottom).
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*
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* Since: 2.12
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*/
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g_object_class_install_property (object_class,
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PROP_TEXT_YALIGN,
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g_param_spec_float ("text-yalign",
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P_("Text y alignment"),
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P_("The vertical text alignment, from 0 (top) to 1 (bottom)."),
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0.0, 1.0, 0.5,
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GTK_PARAM_READWRITE));
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g_object_class_override_property (object_class,
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PROP_ORIENTATION,
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"orientation");
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g_object_class_install_property (object_class,
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PROP_INVERTED,
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g_param_spec_boolean ("inverted",
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P_("Inverted"),
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P_("Invert the direction in which the progress bar grows"),
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FALSE,
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GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY));
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}
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static void
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gtk_cell_renderer_progress_init (GtkCellRendererProgress *cellprogress)
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{
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GtkCellRendererProgressPrivate *priv;
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cellprogress->priv = gtk_cell_renderer_progress_get_instance_private (cellprogress);
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priv = cellprogress->priv;
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priv->value = 0;
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priv->text = NULL;
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priv->label = NULL;
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priv->min_w = -1;
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priv->min_h = -1;
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priv->pulse = -1;
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priv->offset = 0;
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priv->text_xalign = 0.5;
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priv->text_yalign = 0.5;
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priv->orientation = GTK_ORIENTATION_HORIZONTAL,
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priv->inverted = FALSE;
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}
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/**
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* gtk_cell_renderer_progress_new:
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*
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* Creates a new #GtkCellRendererProgress.
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*
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* Returns: the new cell renderer
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*
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* Since: 2.6
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**/
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GtkCellRenderer*
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gtk_cell_renderer_progress_new (void)
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{
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return g_object_new (GTK_TYPE_CELL_RENDERER_PROGRESS, NULL);
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}
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static void
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gtk_cell_renderer_progress_finalize (GObject *object)
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{
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GtkCellRendererProgress *cellprogress = GTK_CELL_RENDERER_PROGRESS (object);
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GtkCellRendererProgressPrivate *priv = cellprogress->priv;
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g_free (priv->text);
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g_free (priv->label);
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G_OBJECT_CLASS (gtk_cell_renderer_progress_parent_class)->finalize (object);
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}
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static void
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gtk_cell_renderer_progress_get_property (GObject *object,
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guint param_id,
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GValue *value,
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GParamSpec *pspec)
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{
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GtkCellRendererProgress *cellprogress = GTK_CELL_RENDERER_PROGRESS (object);
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GtkCellRendererProgressPrivate *priv = cellprogress->priv;
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switch (param_id)
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{
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case PROP_VALUE:
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g_value_set_int (value, priv->value);
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break;
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case PROP_TEXT:
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g_value_set_string (value, priv->text);
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break;
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case PROP_PULSE:
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g_value_set_int (value, priv->pulse);
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break;
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case PROP_TEXT_XALIGN:
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g_value_set_float (value, priv->text_xalign);
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break;
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case PROP_TEXT_YALIGN:
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g_value_set_float (value, priv->text_yalign);
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break;
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case PROP_ORIENTATION:
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g_value_set_enum (value, priv->orientation);
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break;
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case PROP_INVERTED:
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g_value_set_boolean (value, priv->inverted);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, param_id, pspec);
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}
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}
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static void
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gtk_cell_renderer_progress_set_property (GObject *object,
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guint param_id,
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const GValue *value,
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GParamSpec *pspec)
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{
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GtkCellRendererProgress *cellprogress = GTK_CELL_RENDERER_PROGRESS (object);
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GtkCellRendererProgressPrivate *priv = cellprogress->priv;
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switch (param_id)
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{
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case PROP_VALUE:
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gtk_cell_renderer_progress_set_value (cellprogress,
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g_value_get_int (value));
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break;
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case PROP_TEXT:
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gtk_cell_renderer_progress_set_text (cellprogress,
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g_value_get_string (value));
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break;
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case PROP_PULSE:
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gtk_cell_renderer_progress_set_pulse (cellprogress,
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g_value_get_int (value));
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break;
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case PROP_TEXT_XALIGN:
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priv->text_xalign = g_value_get_float (value);
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break;
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case PROP_TEXT_YALIGN:
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priv->text_yalign = g_value_get_float (value);
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break;
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case PROP_ORIENTATION:
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if (priv->orientation != g_value_get_enum (value))
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{
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priv->orientation = g_value_get_enum (value);
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g_object_notify_by_pspec (object, pspec);
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}
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break;
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case PROP_INVERTED:
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if (priv->inverted != g_value_get_boolean (value))
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{
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priv->inverted = g_value_get_boolean (value);
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g_object_notify_by_pspec (object, pspec);
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}
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, param_id, pspec);
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}
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}
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static void
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recompute_label (GtkCellRendererProgress *cellprogress)
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{
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GtkCellRendererProgressPrivate *priv = cellprogress->priv;
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gchar *label;
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if (priv->text)
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label = g_strdup (priv->text);
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else if (priv->pulse < 0)
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label = g_strdup_printf (C_("progress bar label", "%d %%"), priv->value);
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else
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label = NULL;
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g_free (priv->label);
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priv->label = label;
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}
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static void
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gtk_cell_renderer_progress_set_value (GtkCellRendererProgress *cellprogress,
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gint value)
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{
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if (cellprogress->priv->value != value)
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{
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cellprogress->priv->value = value;
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recompute_label (cellprogress);
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g_object_notify (G_OBJECT (cellprogress), "value");
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}
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}
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static void
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gtk_cell_renderer_progress_set_text (GtkCellRendererProgress *cellprogress,
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const gchar *text)
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{
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gchar *new_text;
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new_text = g_strdup (text);
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g_free (cellprogress->priv->text);
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cellprogress->priv->text = new_text;
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recompute_label (cellprogress);
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g_object_notify (G_OBJECT (cellprogress), "text");
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}
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static void
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gtk_cell_renderer_progress_set_pulse (GtkCellRendererProgress *cellprogress,
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gint pulse)
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{
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GtkCellRendererProgressPrivate *priv = cellprogress->priv;
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if (pulse != priv->pulse)
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{
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if (pulse <= 0)
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priv->offset = 0;
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else
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priv->offset = pulse;
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g_object_notify (G_OBJECT (cellprogress), "pulse");
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}
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priv->pulse = pulse;
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recompute_label (cellprogress);
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}
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static void
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set_layout_tnum (PangoLayout *layout)
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{
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PangoAttrList* attrs = pango_attr_list_new ();
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PangoAttribute* attribute_font_features = pango_attr_font_features_new ("tnum 1");
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pango_attr_list_insert (attrs, attribute_font_features);
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pango_layout_set_attributes (layout, attrs);
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pango_attr_list_unref (attrs);
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}
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static void
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compute_dimensions (GtkCellRenderer *cell,
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GtkWidget *widget,
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const gchar *text,
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gint *width,
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gint *height)
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{
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PangoRectangle logical_rect;
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PangoLayout *layout;
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gint xpad, ypad;
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layout = gtk_widget_create_pango_layout (widget, text);
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set_layout_tnum (layout);
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pango_layout_get_pixel_extents (layout, NULL, &logical_rect);
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gtk_cell_renderer_get_padding (cell, &xpad, &ypad);
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if (width)
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*width = logical_rect.width + xpad * 2;
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if (height)
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*height = logical_rect.height + ypad * 2;
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g_object_unref (layout);
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}
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static void
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gtk_cell_renderer_progress_get_size (GtkCellRenderer *cell,
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GtkWidget *widget,
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const GdkRectangle *cell_area,
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gint *x_offset,
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gint *y_offset,
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gint *width,
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gint *height)
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{
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GtkCellRendererProgress *cellprogress = GTK_CELL_RENDERER_PROGRESS (cell);
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GtkCellRendererProgressPrivate *priv = cellprogress->priv;
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gint w, h;
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gchar *text;
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if (priv->min_w < 0)
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{
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text = g_strdup_printf (C_("progress bar label", "%d %%"), 100);
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compute_dimensions (cell, widget, text,
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&priv->min_w,
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&priv->min_h);
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g_free (text);
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}
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compute_dimensions (cell, widget, priv->label, &w, &h);
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if (width)
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*width = MAX (priv->min_w, w);
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if (height)
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*height = MIN (priv->min_h, h);
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/* FIXME: at the moment cell_area is only set when we are requesting
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* the size for drawing the focus rectangle. We now just return
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* the last size we used for drawing the progress bar, which will
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* work for now. Not a really nice solution though.
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*/
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if (cell_area)
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{
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if (width)
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*width = cell_area->width;
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if (height)
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*height = cell_area->height;
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}
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if (x_offset) *x_offset = 0;
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if (y_offset) *y_offset = 0;
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}
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static inline gint
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get_bar_size (gint pulse,
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gint value,
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gint full_size)
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{
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gint bar_size;
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if (pulse < 0)
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bar_size = full_size * MAX (0, value) / 100;
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else if (pulse == 0)
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bar_size = 0;
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else if (pulse == G_MAXINT)
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bar_size = full_size;
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else
|
||
bar_size = MAX (2, full_size / 5);
|
||
|
||
return bar_size;
|
||
}
|
||
|
||
static inline gint
|
||
get_bar_position (gint start,
|
||
gint full_size,
|
||
gint bar_size,
|
||
gint pulse,
|
||
gint offset,
|
||
gboolean is_rtl)
|
||
{
|
||
gint position;
|
||
|
||
if (pulse < 0 || pulse == 0 || pulse == G_MAXINT)
|
||
{
|
||
position = is_rtl ? (start + full_size - bar_size) : start;
|
||
}
|
||
else
|
||
{
|
||
position = (is_rtl ? offset + 12 : offset) % 24;
|
||
if (position > 12)
|
||
position = 24 - position;
|
||
position = start + full_size * position / 15;
|
||
}
|
||
|
||
return position;
|
||
}
|
||
|
||
static void
|
||
gtk_cell_renderer_progress_render (GtkCellRenderer *cell,
|
||
cairo_t *cr,
|
||
GtkWidget *widget,
|
||
const GdkRectangle *background_area,
|
||
const GdkRectangle *cell_area,
|
||
GtkCellRendererState flags)
|
||
{
|
||
GtkCellRendererProgress *cellprogress = GTK_CELL_RENDERER_PROGRESS (cell);
|
||
GtkCellRendererProgressPrivate *priv= cellprogress->priv;
|
||
GtkStyleContext *context;
|
||
GtkBorder padding;
|
||
PangoLayout *layout;
|
||
PangoRectangle logical_rect;
|
||
gint x, y, w, h, x_pos, y_pos, bar_position, bar_size, start, full_size;
|
||
gint xpad, ypad;
|
||
GdkRectangle clip;
|
||
gboolean is_rtl;
|
||
|
||
context = gtk_widget_get_style_context (widget);
|
||
is_rtl = gtk_widget_get_direction (widget) == GTK_TEXT_DIR_RTL;
|
||
|
||
gtk_cell_renderer_get_padding (cell, &xpad, &ypad);
|
||
x = cell_area->x + xpad;
|
||
y = cell_area->y + ypad;
|
||
w = cell_area->width - xpad * 2;
|
||
h = cell_area->height - ypad * 2;
|
||
|
||
gtk_style_context_save (context);
|
||
gtk_style_context_add_class (context, GTK_STYLE_CLASS_TROUGH);
|
||
|
||
gtk_render_background (context, cr, x, y, w, h);
|
||
gtk_render_frame (context, cr, x, y, w, h);
|
||
|
||
gtk_style_context_get_padding (context, gtk_style_context_get_state (context), &padding);
|
||
|
||
x += padding.left;
|
||
y += padding.top;
|
||
w -= padding.left + padding.right;
|
||
h -= padding.top + padding.bottom;
|
||
|
||
gtk_style_context_restore (context);
|
||
|
||
if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
|
||
{
|
||
clip.y = y;
|
||
clip.height = h;
|
||
|
||
start = x;
|
||
full_size = w;
|
||
|
||
bar_size = get_bar_size (priv->pulse, priv->value, full_size);
|
||
|
||
if (!priv->inverted)
|
||
bar_position = get_bar_position (start, full_size, bar_size,
|
||
priv->pulse, priv->offset, is_rtl);
|
||
else
|
||
bar_position = get_bar_position (start, full_size, bar_size,
|
||
priv->pulse, priv->offset, !is_rtl);
|
||
|
||
clip.width = bar_size;
|
||
clip.x = bar_position;
|
||
}
|
||
else
|
||
{
|
||
clip.x = x;
|
||
clip.width = w;
|
||
|
||
start = y;
|
||
full_size = h;
|
||
|
||
bar_size = get_bar_size (priv->pulse, priv->value, full_size);
|
||
|
||
if (priv->inverted)
|
||
bar_position = get_bar_position (start, full_size, bar_size,
|
||
priv->pulse, priv->offset, TRUE);
|
||
else
|
||
bar_position = get_bar_position (start, full_size, bar_size,
|
||
priv->pulse, priv->offset, FALSE);
|
||
|
||
clip.height = bar_size;
|
||
clip.y = bar_position;
|
||
}
|
||
|
||
if (bar_size > 0)
|
||
{
|
||
gtk_style_context_save (context);
|
||
gtk_style_context_add_class (context, GTK_STYLE_CLASS_PROGRESSBAR);
|
||
|
||
gtk_render_background (context, cr, clip.x, clip.y, clip.width, clip.height);
|
||
gtk_render_frame (context, cr, clip.x, clip.y, clip.width, clip.height);
|
||
|
||
gtk_style_context_restore (context);
|
||
}
|
||
|
||
if (priv->label)
|
||
{
|
||
gfloat text_xalign;
|
||
|
||
layout = gtk_widget_create_pango_layout (widget, priv->label);
|
||
set_layout_tnum (layout);
|
||
pango_layout_get_pixel_extents (layout, NULL, &logical_rect);
|
||
|
||
if (gtk_widget_get_direction (widget) != GTK_TEXT_DIR_LTR)
|
||
text_xalign = 1.0 - priv->text_xalign;
|
||
else
|
||
text_xalign = priv->text_xalign;
|
||
|
||
x_pos = x + padding.left + text_xalign *
|
||
(w - padding.left - padding.right - logical_rect.width);
|
||
|
||
y_pos = y + padding.top + priv->text_yalign *
|
||
(h - padding.top - padding.bottom - logical_rect.height);
|
||
|
||
cairo_save (cr);
|
||
gdk_cairo_rectangle (cr, &clip);
|
||
cairo_clip (cr);
|
||
|
||
gtk_style_context_save (context);
|
||
gtk_style_context_add_class (context, GTK_STYLE_CLASS_PROGRESSBAR);
|
||
|
||
gtk_render_layout (context, cr,
|
||
x_pos, y_pos,
|
||
layout);
|
||
|
||
gtk_style_context_restore (context);
|
||
cairo_restore (cr);
|
||
|
||
gtk_style_context_save (context);
|
||
gtk_style_context_add_class (context, GTK_STYLE_CLASS_TROUGH);
|
||
|
||
if (bar_position > start)
|
||
{
|
||
if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
|
||
{
|
||
clip.x = x;
|
||
clip.width = bar_position - x;
|
||
}
|
||
else
|
||
{
|
||
clip.y = y;
|
||
clip.height = bar_position - y;
|
||
}
|
||
|
||
cairo_save (cr);
|
||
gdk_cairo_rectangle (cr, &clip);
|
||
cairo_clip (cr);
|
||
|
||
gtk_render_layout (context, cr,
|
||
x_pos, y_pos,
|
||
layout);
|
||
|
||
cairo_restore (cr);
|
||
}
|
||
|
||
if (bar_position + bar_size < start + full_size)
|
||
{
|
||
if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
|
||
{
|
||
clip.x = bar_position + bar_size;
|
||
clip.width = x + w - (bar_position + bar_size);
|
||
}
|
||
else
|
||
{
|
||
clip.y = bar_position + bar_size;
|
||
clip.height = y + h - (bar_position + bar_size);
|
||
}
|
||
|
||
cairo_save (cr);
|
||
gdk_cairo_rectangle (cr, &clip);
|
||
cairo_clip (cr);
|
||
|
||
gtk_render_layout (context, cr,
|
||
x_pos, y_pos,
|
||
layout);
|
||
|
||
cairo_restore (cr);
|
||
}
|
||
|
||
gtk_style_context_restore (context);
|
||
g_object_unref (layout);
|
||
}
|
||
}
|