forked from AuroraMiddleware/gtk
a72404dd5a
We now rely on toplevels receiving and forwarding all the events the windowing should be able to handle. Event masks are no longer a way to determine whether an event is deliverable ot a widget. Events will always be delivered in the three captured/target/bubbled phases, widgets can now just attach GtkEventControllers and let those handle the events.
278 lines
7.9 KiB
C
278 lines
7.9 KiB
C
/* GTK - The GIMP Toolkit
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* Copyright (C) 2012 Red Hat, Inc.
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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 Lesser 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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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser 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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#include "config.h"
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#include "gtkcolorscaleprivate.h"
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#include "gtkcolorchooserprivate.h"
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#include "gtkgesturelongpress.h"
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#include "gtkcolorutils.h"
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#include "gtkorientable.h"
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#include "gtkrangeprivate.h"
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#include "gtkstylecontext.h"
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#include "gtkaccessible.h"
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#include "gtkprivate.h"
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#include "gtkintl.h"
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#include "gtksnapshot.h"
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#include <math.h>
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struct _GtkColorScalePrivate
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{
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GdkRGBA color;
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GtkColorScaleType type;
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GtkGesture *long_press_gesture;
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};
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enum
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{
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PROP_ZERO,
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PROP_SCALE_TYPE
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};
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static void hold_action (GtkGestureLongPress *gesture,
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gdouble x,
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gdouble y,
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GtkColorScale *scale);
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G_DEFINE_TYPE_WITH_PRIVATE (GtkColorScale, gtk_color_scale, GTK_TYPE_SCALE)
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void
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gtk_color_scale_snapshot_trough (GtkColorScale *scale,
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GtkSnapshot *snapshot,
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int x,
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int y,
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int width,
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int height)
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{
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GtkWidget *widget = GTK_WIDGET (scale);
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cairo_t *cr;
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if (width <= 1 || height <= 1)
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return;
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cr = gtk_snapshot_append_cairo (snapshot,
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&GRAPHENE_RECT_INIT(x, y, width, height),
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"ColorScaleTrough");
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cairo_translate (cr, x, y);
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if (gtk_orientable_get_orientation (GTK_ORIENTABLE (widget)) == GTK_ORIENTATION_HORIZONTAL &&
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gtk_widget_get_direction (widget) == GTK_TEXT_DIR_RTL)
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{
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cairo_translate (cr, width, 0);
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cairo_scale (cr, -1, 1);
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}
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if (scale->priv->type == GTK_COLOR_SCALE_HUE)
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{
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gint stride;
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cairo_surface_t *tmp;
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guint red, green, blue;
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guint32 *data, *p;
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gdouble h;
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gdouble r, g, b;
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gdouble f;
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int hue_x, hue_y;
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stride = cairo_format_stride_for_width (CAIRO_FORMAT_RGB24, width);
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data = g_malloc (height * stride);
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f = 1.0 / (height - 1);
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for (hue_y = 0; hue_y < height; hue_y++)
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{
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h = CLAMP (hue_y * f, 0.0, 1.0);
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p = data + hue_y * (stride / 4);
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for (hue_x = 0; hue_x < width; hue_x++)
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{
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gtk_hsv_to_rgb (h, 1, 1, &r, &g, &b);
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red = CLAMP (r * 255, 0, 255);
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green = CLAMP (g * 255, 0, 255);
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blue = CLAMP (b * 255, 0, 255);
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p[hue_x] = (red << 16) | (green << 8) | blue;
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}
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}
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tmp = cairo_image_surface_create_for_data ((guchar *)data, CAIRO_FORMAT_RGB24,
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width, height, stride);
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cairo_set_source_surface (cr, tmp, 0, 0);
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cairo_paint (cr);
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cairo_surface_destroy (tmp);
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g_free (data);
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}
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else if (scale->priv->type == GTK_COLOR_SCALE_ALPHA)
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{
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cairo_pattern_t *pattern;
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cairo_matrix_t matrix;
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GdkRGBA *color;
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cairo_set_source_rgb (cr, 0.33, 0.33, 0.33);
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cairo_paint (cr);
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cairo_set_source_rgb (cr, 0.66, 0.66, 0.66);
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pattern = _gtk_color_chooser_get_checkered_pattern ();
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cairo_matrix_init_scale (&matrix, 0.125, 0.125);
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cairo_pattern_set_matrix (pattern, &matrix);
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cairo_mask (cr, pattern);
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cairo_pattern_destroy (pattern);
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color = &scale->priv->color;
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pattern = cairo_pattern_create_linear (0, 0, width, 0);
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cairo_pattern_add_color_stop_rgba (pattern, 0, color->red, color->green, color->blue, 0);
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cairo_pattern_add_color_stop_rgba (pattern, width, color->red, color->green, color->blue, 1);
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cairo_set_source (cr, pattern);
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cairo_paint (cr);
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cairo_pattern_destroy (pattern);
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}
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cairo_destroy (cr);
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}
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static void
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gtk_color_scale_init (GtkColorScale *scale)
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{
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GtkStyleContext *context;
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scale->priv = gtk_color_scale_get_instance_private (scale);
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scale->priv->long_press_gesture = gtk_gesture_long_press_new (GTK_WIDGET (scale));
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g_signal_connect (scale->priv->long_press_gesture, "pressed",
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G_CALLBACK (hold_action), scale);
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gtk_event_controller_set_propagation_phase (GTK_EVENT_CONTROLLER (scale->priv->long_press_gesture),
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GTK_PHASE_TARGET);
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context = gtk_widget_get_style_context (GTK_WIDGET (scale));
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gtk_style_context_add_class (context, "color");
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}
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static void
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scale_finalize (GObject *object)
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{
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GtkColorScale *scale = GTK_COLOR_SCALE (object);
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g_clear_object (&scale->priv->long_press_gesture);
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G_OBJECT_CLASS (gtk_color_scale_parent_class)->finalize (object);
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}
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static void
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scale_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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GtkColorScale *scale = GTK_COLOR_SCALE (object);
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switch (prop_id)
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{
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case PROP_SCALE_TYPE:
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g_value_set_int (value, scale->priv->type);
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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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scale_set_type (GtkColorScale *scale,
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GtkColorScaleType type)
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{
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AtkObject *atk_obj;
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scale->priv->type = type;
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atk_obj = gtk_widget_get_accessible (GTK_WIDGET (scale));
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if (GTK_IS_ACCESSIBLE (atk_obj))
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{
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if (type == GTK_COLOR_SCALE_HUE)
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atk_object_set_name (atk_obj, C_("Color channel", "Hue"));
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else if (type == GTK_COLOR_SCALE_ALPHA)
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atk_object_set_name (atk_obj, C_("Color channel", "Alpha"));
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atk_object_set_role (atk_obj, ATK_ROLE_COLOR_CHOOSER);
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}
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}
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static void
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scale_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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GtkColorScale *scale = GTK_COLOR_SCALE (object);
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switch (prop_id)
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{
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case PROP_SCALE_TYPE:
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scale_set_type (scale, (GtkColorScaleType)g_value_get_int (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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hold_action (GtkGestureLongPress *gesture,
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gdouble x,
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gdouble y,
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GtkColorScale *scale)
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{
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gboolean handled;
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g_signal_emit_by_name (scale, "popup-menu", &handled);
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}
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static void
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gtk_color_scale_class_init (GtkColorScaleClass *class)
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{
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GObjectClass *object_class = G_OBJECT_CLASS (class);
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object_class->finalize = scale_finalize;
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object_class->get_property = scale_get_property;
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object_class->set_property = scale_set_property;
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g_object_class_install_property (object_class, PROP_SCALE_TYPE,
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g_param_spec_int ("scale-type", P_("Scale type"), P_("Scale type"),
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0, 1, 0,
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GTK_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY));
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}
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void
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gtk_color_scale_set_rgba (GtkColorScale *scale,
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const GdkRGBA *color)
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{
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scale->priv->color = *color;
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gtk_widget_queue_draw (GTK_WIDGET (scale));
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}
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GtkWidget *
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gtk_color_scale_new (GtkAdjustment *adjustment,
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GtkColorScaleType type)
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{
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return g_object_new (GTK_TYPE_COLOR_SCALE,
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"adjustment", adjustment,
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"draw-value", FALSE,
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"scale-type", type,
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NULL);
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}
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