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/* $Id: gtkdatabox_grid.c 4 2008-06-22 09:19:11Z rbock $ */
/* GtkDatabox - An extension to the gtk+ library
* Copyright (C) 1998 - 2008 Dr. Roland Bock
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License
* as published by the Free Software Foundation; either version 2.1
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <gtkdatabox_grid.h>
G_DEFINE_TYPE(GtkDataboxGrid, gtk_databox_grid,
GTK_DATABOX_TYPE_GRAPH)
static void gtk_databox_grid_real_draw (GtkDataboxGraph * grid,
GtkDatabox* box);
static cairo_t* gtk_databox_grid_real_create_gc (GtkDataboxGraph * graph,
GtkDatabox* box);
/* IDs of properties */
enum
{
GRID_HLINES = 1,
GRID_VLINES,
GRID_HLINE_VALS,
GRID_VLINE_VALS
};
/**
* GtkDataboxGridPrivate
*
* A private data structure used by the #GtkDataboxGrid. It shields all internal things
* from developers who are just using the object.
*
**/
typedef struct _GtkDataboxGridPrivate GtkDataboxGridPrivate;
struct _GtkDataboxGridPrivate
{
gint hlines;
gint vlines;
gfloat *hline_vals;
gfloat *vline_vals;
};
static void
gtk_databox_grid_set_property (GObject * object,
guint property_id,
const GValue * value, GParamSpec * pspec)
{
GtkDataboxGrid *grid = GTK_DATABOX_GRID (object);
switch (property_id)
{
case GRID_HLINES:
{
gtk_databox_grid_set_hlines (grid, g_value_get_int (value));
}
break;
case GRID_VLINES:
{
gtk_databox_grid_set_vlines (grid, g_value_get_int (value));
}
break;
case GRID_HLINE_VALS:
{
gtk_databox_grid_set_hline_vals (grid, (gfloat *) g_value_get_pointer (value));
}
break;
case GRID_VLINE_VALS:
{
gtk_databox_grid_set_vline_vals (grid, (gfloat *) g_value_get_pointer (value));
}
break;
default:
/* We don't have any other property... */
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
static void
gtk_databox_grid_get_property (GObject * object,
guint property_id,
GValue * value, GParamSpec * pspec)
{
GtkDataboxGrid *grid = GTK_DATABOX_GRID (object);
switch (property_id)
{
case GRID_HLINES:
{
g_value_set_int (value, gtk_databox_grid_get_hlines (grid));
}
break;
case GRID_VLINES:
{
g_value_set_int (value, gtk_databox_grid_get_vlines (grid));
}
break;
case GRID_HLINE_VALS:
{
g_value_set_pointer (value, gtk_databox_grid_get_hline_vals (grid));
}
break;
case GRID_VLINE_VALS:
{
g_value_set_pointer (value, gtk_databox_grid_get_vline_vals (grid));
}
break;
default:
/* We don't have any other property... */
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
static cairo_t*
gtk_databox_grid_real_create_gc (GtkDataboxGraph * graph,
GtkDatabox* box)
{
cairo_t *cr;
static const double grid_dash = 5.0;
g_return_val_if_fail (GTK_DATABOX_IS_GRID (graph), NULL);
cr = GTK_DATABOX_GRAPH_CLASS (gtk_databox_grid_parent_class)->create_gc (graph, box);
if (cr)
cairo_set_dash(cr, &grid_dash, 1, 0.0);
return cr;
}
static void
grid_finalize (GObject * object)
{
GtkDataboxGraph *graph = GTK_DATABOX_GRAPH (object);
/* Chain up to the parent class */
G_OBJECT_CLASS (gtk_databox_grid_parent_class)->finalize (object);
}
static void
gtk_databox_grid_class_init (GtkDataboxGridClass *klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
GtkDataboxGraphClass *graph_class = GTK_DATABOX_GRAPH_CLASS (klass);
GParamSpec *grid_param_spec;
gobject_class->set_property = gtk_databox_grid_set_property;
gobject_class->get_property = gtk_databox_grid_get_property;
gobject_class->finalize = grid_finalize;
grid_param_spec = g_param_spec_int ("grid-hlines", "grid-hlines", "Number of horizontal lines", G_MININT, G_MAXINT, 0, /* default value */
G_PARAM_READWRITE);
g_object_class_install_property (gobject_class,
GRID_HLINES, grid_param_spec);
grid_param_spec = g_param_spec_int ("grid-vlines", "grid-vlines", "Number of vertical lines", G_MININT, G_MAXINT, 0, /* default value */
G_PARAM_READWRITE);
g_object_class_install_property (gobject_class,
GRID_VLINES, grid_param_spec);
grid_param_spec = g_param_spec_pointer ("grid-hline-vals", "Grid Hline Vals", "The locations of each of the horizontal lines", G_PARAM_READWRITE);
g_object_class_install_property (gobject_class,
GRID_HLINE_VALS, grid_param_spec);
grid_param_spec = g_param_spec_pointer ("grid-vline-vals", "Grid Vline Vals", "The locations of each of the vertical lines", G_PARAM_READWRITE);
g_object_class_install_property (gobject_class,
GRID_VLINE_VALS, grid_param_spec);
graph_class->draw = gtk_databox_grid_real_draw;
graph_class->create_gc = gtk_databox_grid_real_create_gc;
g_type_class_add_private (klass, sizeof (GtkDataboxGridPrivate));
}
static void
gtk_databox_grid_init (GtkDataboxGrid *grid)
{
}
/**
* gtk_databox_grid_new:
* @hlines: number of horizontal lines in the grid
* @vlines: number of vertical lines in the grid
* @color: color of the grid
* @size: line width of the grid
*
* Creates a new #GtkDataboxGrid object which can be added to a #GtkDatabox widget as nice decoration for other graphs.
*
* Return value: A new #GtkDataboxGrid object
**/
GtkDataboxGraph *
gtk_databox_grid_new (gint hlines, gint vlines, GdkRGBA * color, guint size)
{
GtkDataboxGrid *grid;
grid = g_object_new (GTK_DATABOX_TYPE_GRID,
"color", color,
"size", size,
"grid-hlines", hlines, "grid-vlines", vlines, "grid-hline-vals",NULL, "grid-vline-vals", NULL, NULL);
return GTK_DATABOX_GRAPH (grid);
}
/**
* gtk_databox_grid_array_new:
* @hlines: number of horizontal lines in the grid
* @vlines: number of vertical lines in the grid
* @hline_vals: a pointer to an array of gfloat horizontal grid coordinate
* @vline_vals: a pointer to an array of gfloat vertical grid coordinate
* @color: color of the grid
* @size: line width of the grid
*
* Creates a new #GtkDataboxGrid object which can be added to a #GtkDatabox widget as nice decoration for other graphs.
*
* Return value: A new #GtkDataboxGrid object
**/
GtkDataboxGraph *gtk_databox_grid_array_new (gint hlines, gint vlines, gfloat * local_hline_vals, gfloat * local_vline_vals,
GdkRGBA * color, guint size)
{
GtkDataboxGrid *grid;
grid = g_object_new (GTK_DATABOX_TYPE_GRID,
"color", color,
"size", size,
"grid-hlines", hlines, "grid-vlines", vlines, "grid-hline-vals", local_hline_vals, "grid-vline-vals", local_vline_vals, NULL);
return GTK_DATABOX_GRAPH (grid);
}
static void
gtk_databox_grid_real_draw (GtkDataboxGraph * graph,
GtkDatabox* box)
{
GtkWidget *widget;
GtkDataboxGrid *grid = GTK_DATABOX_GRID (graph);
GtkDataboxGridPrivate *priv = GTK_DATABOX_GRID_GET_PRIVATE(grid); gint i = 0;
gfloat x;
gfloat y;
gint16 width;
gint16 height;
gfloat offset_x;
gfloat offset_y;
gfloat factor_x;
gfloat factor_y;
gint16 pixel_x;
gint16 pixel_y;
gfloat left, right, top, bottom;
cairo_t *cr;
GtkAllocation allocation;
g_return_if_fail (GTK_DATABOX_IS_GRID (grid));
g_return_if_fail (GTK_IS_DATABOX (box));
widget = GTK_WIDGET(box);
gtk_widget_get_allocation(widget, &allocation);
gtk_databox_get_total_limits (box, &left, &right, &top, &bottom);
cr = gtk_databox_graph_create_gc (graph, box);
width = allocation.width;
height = allocation.height;
offset_x = left;
factor_x =
(right - left) / (priv->vlines + 1);
offset_y = top;
factor_y =
(bottom - top) / (priv->hlines + 1);
if (priv->hline_vals == NULL)
for (i = 0; i < priv->hlines; i++)
{
y = offset_y + (i + 1) * factor_y;
pixel_y = gtk_databox_value_to_pixel_y (box, y);
cairo_move_to (cr, 0.0, pixel_y + 0.5);
cairo_line_to (cr, width, pixel_y + 0.5);
}
else
for (i = 0; i < priv->hlines; i++)
{
y = priv->hline_vals[i];
pixel_y = gtk_databox_value_to_pixel_y (box, y);
cairo_move_to (cr, 0.0, pixel_y + 0.5);
cairo_line_to (cr, width, pixel_y + 0.5);
}
if (priv->vline_vals == NULL)
for (i = 0; i < priv->vlines; i++)
{
x = offset_x + (i + 1) * factor_x;
pixel_x = gtk_databox_value_to_pixel_x (box, x);
cairo_move_to (cr, pixel_x + 0.5, 0.0);
cairo_line_to (cr, pixel_x + 0.5, height);
}
else
for (i = 0; i < priv->vlines; i++)
{
x = priv->vline_vals[i];
pixel_x = gtk_databox_value_to_pixel_x (box, x);
cairo_move_to (cr, pixel_x + 0.5, 0);
cairo_line_to (cr, pixel_x + 0.5, height);
}
cairo_stroke(cr);
cairo_destroy(cr);
return;
}
/**
* gtk_databox_grid_set_hlines:
* @grid: a #GtkDataboxGrid graph object
* @hlines: number of vertical lines in the grid
*
* Sets the number of horizontal lines in the @grid.
**/
void
gtk_databox_grid_set_hlines (GtkDataboxGrid * grid, gint hlines)
{
g_return_if_fail (GTK_DATABOX_IS_GRID (grid));
GTK_DATABOX_GRID_GET_PRIVATE(grid)->hlines = MAX (1, hlines);
g_object_notify (G_OBJECT (grid), "grid-hlines");
}
/**
* gtk_databox_grid_get_hlines:
* @grid: a #GtkDataboxGrid graph object
*
* Gets the number of horizontal lines in the @grid.
*
* Return value: Number of horizontal lines in the @grid.
**/
gint
gtk_databox_grid_get_hlines (GtkDataboxGrid * grid)
{
g_return_val_if_fail (GTK_DATABOX_IS_GRID (grid), -1);
return GTK_DATABOX_GRID_GET_PRIVATE(grid)->hlines;
}
/**
* gtk_databox_grid_set_vlines:
* @grid: a #GtkDataboxGrid graph object
* @vlines: number of vertical lines in the grid
*
* Sets the number of vertical lines in the @grid.
**/
void
gtk_databox_grid_set_vlines (GtkDataboxGrid * grid, gint vlines)
{
g_return_if_fail (GTK_DATABOX_IS_GRID (grid));
GTK_DATABOX_GRID_GET_PRIVATE(grid)->vlines = MAX (1, vlines);
g_object_notify (G_OBJECT (grid), "grid-vlines");
}
/**
* gtk_databox_grid_get_vlines:
* @grid: a #GtkDataboxGrid graph object
*
* Gets the number of vertical lines in the @grid.
*
* Return value: Number of vertical lines in the @grid.
**/
gint
gtk_databox_grid_get_vlines (GtkDataboxGrid * grid)
{
g_return_val_if_fail (GTK_DATABOX_IS_GRID (grid), -1);
return GTK_DATABOX_GRID_GET_PRIVATE(grid)->vlines;
}
/**
* gtk_databox_grid_set_hline_vals:
* @grid: a #GtkDataboxGrid graph object
* @hline_vals: sets the pointer to the hline values for the grid
*
* Sets the pointer to the horizontal lines in the @grid.
**/
void
gtk_databox_grid_set_hline_vals (GtkDataboxGrid * grid, gfloat *hline_vals)
{
g_return_if_fail (GTK_DATABOX_IS_GRID (grid));
GTK_DATABOX_GRID_GET_PRIVATE(grid)->hline_vals = hline_vals;
g_object_notify (G_OBJECT (grid), "grid-hline-vals");
}
/**
* gtk_databox_grid_get_hline_vals:
* @grid: a #GtkDataboxGrid graph object
*
* Gets the pointer to the horizontal line values for the @grid.
*
* Return value: Pointer to the horizontal line values for the @grid. (or NULL if error)
**/
gfloat*
gtk_databox_grid_get_hline_vals (GtkDataboxGrid * grid)
{
g_return_val_if_fail (GTK_DATABOX_IS_GRID (grid), NULL);
return GTK_DATABOX_GRID_GET_PRIVATE(grid)->hline_vals;
}
/**
* gtk_databox_grid_set_vline_vals:
* @grid: a #GtkDataboxGrid graph object
* @vline_vals: sets the pointer to the vline values for the grid
*
* Sets the pointer to the vertical lines in the @grid.
**/
void
gtk_databox_grid_set_vline_vals (GtkDataboxGrid * grid, gfloat *vline_vals)
{
g_return_if_fail (GTK_DATABOX_IS_GRID (grid));
GTK_DATABOX_GRID_GET_PRIVATE(grid)->vline_vals = vline_vals;
g_object_notify (G_OBJECT (grid), "grid-vline-vals");
}
/**
* gtk_databox_grid_get_vline_vals:
* @grid: a #GtkDataboxGrid graph object
*
* Gets the pointer to the vertical line values for the @grid.
*
* Return value: Pointer to the vertical line values for the @grid. (or NULL if error)
**/
gfloat*
gtk_databox_grid_get_vline_vals (GtkDataboxGrid * grid)
{
g_return_val_if_fail (GTK_DATABOX_IS_GRID (grid), NULL);
return GTK_DATABOX_GRID_GET_PRIVATE(grid)->vline_vals;
}

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