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Preliminary color sliders

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This commit is contained in:
Matthias Clasen 2012-02-01 00:37:36 -05:00
parent 8178578359
commit 1720e8ebf3
1 changed files with 199 additions and 1 deletions
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200
gtk/gtkcoloreditor.c
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@ -49,6 +49,9 @@ struct _GtkColorEditorPrivate
GtkAdjustment *h_adj;
GtkAdjustment *a_adj;
cairo_surface_t *h_surface;
cairo_surface_t *a_surface;
GdkRGBA color;
gdouble h, s, v;
guint text_changed : 1;
@ -140,8 +143,14 @@ h_changed (GtkAdjustment *adj,
&editor->priv->color.green,
&editor->priv->color.blue);
gtk_color_plane_set_h (GTK_COLOR_PLANE (editor->priv->sv_plane), editor->priv->h);
gtk_widget_queue_draw (editor->priv->swatch);
update_entry (editor);
gtk_widget_queue_draw (editor->priv->swatch);
gtk_widget_queue_draw (editor->priv->a_slider);
if (editor->priv->a_surface)
{
cairo_surface_destroy (editor->priv->a_surface);
editor->priv->a_surface = NULL;
}
g_object_notify (G_OBJECT (editor), "color");
}
@ -157,6 +166,13 @@ sv_changed (GtkColorPlane *plane,
&editor->priv->color.blue);
update_entry (editor);
gtk_widget_queue_draw (editor->priv->swatch);
gtk_widget_queue_draw (editor->priv->a_slider);
if (editor->priv->a_surface)
{
cairo_surface_destroy (editor->priv->a_surface);
editor->priv->a_surface = NULL;
}
g_object_notify (G_OBJECT (editor), "color");
}
static void
@ -215,6 +231,167 @@ swatch_draw (GtkWidget *widget,
return TRUE;
}
static cairo_surface_t *
create_h_surface (GtkWidget *widget)
{
cairo_t *cr;
cairo_surface_t *surface;
gint width, height, stride;
cairo_surface_t *tmp;
guint red, green, blue;
guint32 *data, *p;
gdouble h;
gdouble r, g, b;
gdouble f;
gint x, y;
if (!gtk_widget_get_realized (widget))
return NULL;
width = gtk_widget_get_allocated_width (widget);
height = gtk_widget_get_allocated_height (widget);
surface = gdk_window_create_similar_surface (gtk_widget_get_window (widget),
CAIRO_CONTENT_COLOR,
width, height);
if (width == 1 || height == 1)
return surface;
stride = cairo_format_stride_for_width (CAIRO_FORMAT_RGB24, width);
data = g_malloc (height * stride);
f = 1.0 / (height - 1);
for (y = 0; y < height; y++)
{
h = CLAMP (y * f, 0.0, 1.0);
p = data + y * (stride / 4);
for (x = 0; x < width; x++)
{
gtk_hsv_to_rgb (h, 1, 1, &r, &g, &b);
red = CLAMP (r * 255, 0, 255);
green = CLAMP (g * 255, 0, 255);
blue = CLAMP (b * 255, 0, 255);
p[x] = (red << 16) | (green << 8) | blue;
}
}
tmp = cairo_image_surface_create_for_data ((guchar *)data, CAIRO_FORMAT_RGB24,
width, height, stride);
cr = cairo_create (surface);
cairo_set_source_surface (cr, tmp, 0, 0);
cairo_paint (cr);
cairo_destroy (cr);
cairo_surface_destroy (tmp);
g_free (data);
return surface;
}
static gboolean
h_draw (GtkWidget *widget,
cairo_t *cr,
GtkColorEditor *editor)
{
cairo_surface_t *surface;
gint width, height;
width = gtk_widget_get_allocated_width (widget);
height = gtk_widget_get_allocated_height (widget);
if (!editor->priv->h_surface)
editor->priv->h_surface = create_h_surface (widget);
surface = editor->priv->h_surface;
cairo_save (cr);
cairo_rectangle (cr, 1, 1, width - 2, height - 2);
cairo_clip (cr);
cairo_set_source_surface (cr, surface, 0, 0);
cairo_paint (cr);
cairo_restore (cr);
return FALSE;
}
static cairo_surface_t *
create_a_surface (GtkWidget *widget,
GdkRGBA *color)
{
cairo_t *cr;
cairo_surface_t *surface;
cairo_pattern_t *pattern;
cairo_matrix_t matrix;
gint width, height;
if (!gtk_widget_get_realized (widget))
return NULL;
width = gtk_widget_get_allocated_width (widget);
height = gtk_widget_get_allocated_height (widget);
surface = gdk_window_create_similar_surface (gtk_widget_get_window (widget),
CAIRO_CONTENT_COLOR,
width, height);
if (width == 1 || height == 1)
return surface;
cr = cairo_create (surface);
cairo_set_source_rgb (cr, 0.33, 0.33, 0.33);
cairo_paint (cr);
cairo_set_source_rgb (cr, 0.66, 0.66, 0.66);
pattern = get_checkered_pattern ();
cairo_matrix_init_scale (&matrix, 0.125, 0.125);
cairo_pattern_set_matrix (pattern, &matrix);
cairo_mask (cr, pattern);
cairo_pattern_destroy (pattern);
pattern = cairo_pattern_create_linear (0, 0, width, 0);
cairo_pattern_add_color_stop_rgba (pattern, 0, color->red, color->green, color->blue, 0);
cairo_pattern_add_color_stop_rgba (pattern, width, color->red, color->green, color->blue, 1);
cairo_set_source (cr, pattern);
cairo_paint (cr);
cairo_pattern_destroy (pattern);
cairo_destroy (cr);
return surface;
}
static gboolean
a_draw (GtkWidget *widget,
cairo_t *cr,
GtkColorEditor *editor)
{
cairo_surface_t *surface;
gint width, height;
width = gtk_widget_get_allocated_width (widget);
height = gtk_widget_get_allocated_height (widget);
if (!editor->priv->a_surface)
editor->priv->a_surface = create_a_surface (widget, &editor->priv->color);
surface = editor->priv->a_surface;
cairo_save (cr);
cairo_rectangle (cr, 1, 1, width - 2, height - 2);
cairo_clip (cr);
cairo_set_source_surface (cr, surface, 0, 0);
cairo_paint (cr);
cairo_restore (cr);
return FALSE;
}
static void
gtk_color_editor_init (GtkColorEditor *editor)
{
@ -246,6 +423,7 @@ gtk_color_editor_init (GtkColorEditor *editor)
g_signal_connect (adj, "value-changed", G_CALLBACK (h_changed), editor);
editor->priv->h_slider = gtk_scale_new (GTK_ORIENTATION_VERTICAL, adj);
editor->priv->h_adj = adj;
g_signal_connect (editor->priv->h_slider, "draw", G_CALLBACK (h_draw), editor);
gtk_scale_set_draw_value (GTK_SCALE (editor->priv->h_slider), FALSE);
editor->priv->sv_plane = gtk_color_plane_new ();
@ -260,6 +438,7 @@ gtk_color_editor_init (GtkColorEditor *editor)
g_signal_connect (adj, "value-changed", G_CALLBACK (a_changed), editor);
gtk_scale_set_draw_value (GTK_SCALE (editor->priv->a_slider), FALSE);
editor->priv->a_adj = adj;
g_signal_connect (editor->priv->a_slider, "draw", G_CALLBACK (a_draw), editor);
gtk_grid_attach (GTK_GRID (grid), editor->priv->swatch, 1, 0, 1, 1);
gtk_grid_attach (GTK_GRID (grid), editor->priv->entry, 2, 0, 1, 1);
@ -337,11 +516,25 @@ gtk_color_editor_set_property (GObject *object,
}
}
static void
gtk_color_editor_finalize (GObject *object)
{
GtkColorEditor *editor = GTK_COLOR_EDITOR (object);
if (editor->priv->h_surface)
cairo_surface_destroy (editor->priv->h_surface);
if (editor->priv->a_surface)
cairo_surface_destroy (editor->priv->a_surface);
G_OBJECT_CLASS (gtk_color_editor_parent_class)->finalize (object);
}
static void
gtk_color_editor_class_init (GtkColorEditorClass *class)
{
GObjectClass *object_class = G_OBJECT_CLASS (class);
object_class->finalize = gtk_color_editor_finalize;
object_class->get_property = gtk_color_editor_get_property;
object_class->set_property = gtk_color_editor_set_property;
@ -386,6 +579,11 @@ gtk_color_editor_set_color (GtkColorChooser *chooser,
gtk_adjustment_set_value (editor->priv->a_adj, editor->priv->color.alpha);
gtk_widget_queue_draw (GTK_WIDGET (editor));
if (editor->priv->a_surface)
{
cairo_surface_destroy (editor->priv->a_surface);
editor->priv->a_surface = NULL;
}
g_object_notify (G_OBJECT (editor), "color");
}