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Move the plane into a separate widget

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This commit is contained in:
Matthias Clasen
2012-01-30 18:37:00 -05:00
parent 021f5e0365
commit e06ccb0fbb
5 changed files with 567 additions and 353 deletions
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2
gtk/Makefile.am
View File

@ -415,6 +415,7 @@ gtk_private_h_sources = \
gtkcellareaboxcontextprivate.h \ gtkcellareaboxcontextprivate.h \
gtkcolorswatch.h \ gtkcolorswatch.h \
gtkcoloreditor.h \ gtkcoloreditor.h \
gtkcolorplane.h \
gtkcolorchooserprivate.h \ gtkcolorchooserprivate.h \
gtkcontainerprivate.h \ gtkcontainerprivate.h \
gtkcsscomputedvaluesprivate.h \ gtkcsscomputedvaluesprivate.h \
@ -599,6 +600,7 @@ gtk_base_c_sources = \
gtkcolorsel.c \ gtkcolorsel.c \
gtkcolorseldialog.c \ gtkcolorseldialog.c \
gtkcoloreditor.c \ gtkcoloreditor.c \
gtkcolorplane.c \
gtkcolorswatch.c \ gtkcolorswatch.c \
gtkcolorchooser.c \ gtkcolorchooser.c \
gtkcolorchooserwidget.c \ gtkcolorchooserwidget.c \

6
gtk/gtkcolorchooserwidget.c
View File

@ -61,12 +61,18 @@ static void
select_swatch (GtkColorChooserWidget *cc, select_swatch (GtkColorChooserWidget *cc,
GtkColorSwatch *swatch) GtkColorSwatch *swatch)
{ {
GdkRGBA color;
if (cc->priv->current == swatch) if (cc->priv->current == swatch)
return; return;
if (cc->priv->current != NULL) if (cc->priv->current != NULL)
gtk_color_swatch_set_selected (cc->priv->current, FALSE); gtk_color_swatch_set_selected (cc->priv->current, FALSE);
gtk_color_swatch_set_selected (swatch, TRUE); gtk_color_swatch_set_selected (swatch, TRUE);
cc->priv->current = swatch; cc->priv->current = swatch;
gtk_color_swatch_get_color (swatch, &color);
g_settings_set (cc->priv->settings, "selected-color", "(bdddd)",
TRUE, color.red, color.green, color.blue, color.alpha);
g_object_notify (G_OBJECT (cc), "color"); g_object_notify (G_OBJECT (cc), "color");
} }

377
gtk/gtkcoloreditor.c
View File

@ -18,8 +18,6 @@
*/ */
/* TODO /* TODO
* - split out sv-plane
* - focus indication
* - custom sliders * - custom sliders
* - pop-up entries * - pop-up entries
*/ */
@ -28,6 +26,7 @@
#include "gtkcolorchooserprivate.h" #include "gtkcolorchooserprivate.h"
#include "gtkcoloreditor.h" #include "gtkcoloreditor.h"
#include "gtkcolorplane.h"
#include "gtkgrid.h" #include "gtkgrid.h"
#include "gtkscale.h" #include "gtkscale.h"
#include "gtkaspectframe.h" #include "gtkaspectframe.h"
@ -50,11 +49,8 @@ struct _GtkColorEditorPrivate
GtkAdjustment *h_adj; GtkAdjustment *h_adj;
GtkAdjustment *a_adj; GtkAdjustment *a_adj;
cairo_surface_t *surface;
GdkRGBA color; GdkRGBA color;
gdouble h, s, v; gdouble h, s, v;
gint x, y;
gboolean in_drag;
gboolean text_changed; gboolean text_changed;
}; };
@ -70,163 +66,6 @@ G_DEFINE_TYPE_WITH_CODE (GtkColorEditor, gtk_color_editor, GTK_TYPE_BOX,
G_IMPLEMENT_INTERFACE (GTK_TYPE_COLOR_CHOOSER, G_IMPLEMENT_INTERFACE (GTK_TYPE_COLOR_CHOOSER,
gtk_color_editor_iface_init)) gtk_color_editor_iface_init))
static gboolean
sv_draw (GtkWidget *widget,
cairo_t *cr,
GtkColorEditor *editor)
{
gint x, y;
gint width, height;
cairo_set_source_surface (cr, editor->priv->surface, 0, 0);
cairo_paint (cr);
x = editor->priv->x;
y = editor->priv->y;
width = gtk_widget_get_allocated_width (widget);
height = gtk_widget_get_allocated_height (widget);
cairo_move_to (cr, 0, y + 0.5);
cairo_line_to (cr, width, y + 0.5);
cairo_move_to (cr, x + 0.5, 0);
cairo_line_to (cr, x + 0.5, height);
cairo_set_line_width (cr, 3.0);
cairo_set_source_rgba (cr, 1.0, 1.0, 1.0, 0.6);
cairo_stroke_preserve (cr);
cairo_set_line_width (cr, 1.0);
cairo_set_source_rgba (cr, 0.0, 0.0, 0.0, 0.8);
cairo_stroke (cr);
return FALSE;
}
static void
create_sv_surface (GtkColorEditor *editor)
{
GtkWidget *sv_plane;
cairo_t *cr;
cairo_surface_t *surface;
gint width, height, stride;
cairo_surface_t *tmp;
guint red, green, blue;
guint32 *data, *p;
gdouble h, s, v;
gdouble r, g, b;
gdouble sf, vf;
gint x, y;
sv_plane = editor->priv->sv_plane;
if (!gtk_widget_get_realized (sv_plane))
return;
width = gtk_widget_get_allocated_width (sv_plane);
height = gtk_widget_get_allocated_height (sv_plane);
surface = gdk_window_create_similar_surface (gtk_widget_get_window (sv_plane),
CAIRO_CONTENT_COLOR,
width, height);
if (editor->priv->surface)
cairo_surface_destroy (editor->priv->surface);
editor->priv->surface = surface;
if (width == 1 || height == 1)
return;
stride = cairo_format_stride_for_width (CAIRO_FORMAT_RGB24, width);
data = g_malloc (4 * height * stride);
h = editor->priv->h;
sf = 1.0 / (height - 1);
vf = 1.0 / (width - 1);
for (y = 0; y < height; y++)
{
s = CLAMP (1.0 - y * sf, 0.0, 1.0);
p = data + y * (stride / 4);
for (x = 0; x < width; x++)
{
v = x * vf;
gtk_hsv_to_rgb (h, s, v, &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);
}
static void
hsv_to_xy (GtkColorEditor *editor)
{
GtkWidget *sv_plane;
gint width, height;
sv_plane = editor->priv->sv_plane;
width = gtk_widget_get_allocated_width (GTK_WIDGET (sv_plane));
height = gtk_widget_get_allocated_height (GTK_WIDGET (sv_plane));
editor->priv->x = CLAMP (width * editor->priv->v, 0, width - 1);
editor->priv->y = CLAMP (height * (1 - editor->priv->s), 0, height - 1);
}
static gboolean
sv_configure (GtkWidget *widget,
GdkEventConfigure *event,
GtkColorEditor *editor)
{
create_sv_surface (editor);
hsv_to_xy (editor);
return TRUE;
}
static void
set_cross_grab (GtkWidget *widget,
GdkDevice *device,
guint32 time)
{
GdkCursor *cursor;
cursor = gdk_cursor_new_for_display (gtk_widget_get_display (GTK_WIDGET (widget)),
GDK_CROSSHAIR);
gdk_device_grab (device,
gtk_widget_get_window (widget),
GDK_OWNERSHIP_NONE,
FALSE,
GDK_POINTER_MOTION_MASK
| GDK_POINTER_MOTION_HINT_MASK
| GDK_BUTTON_RELEASE_MASK,
cursor,
time);
g_object_unref (cursor);
}
static gboolean
sv_grab_broken (GtkWidget *widget,
GdkEventGrabBroken *event,
GtkColorEditor *editor)
{
editor->priv->in_drag = FALSE;
return TRUE;
}
static guint static guint
scale_round (gdouble value, gdouble scale) scale_round (gdouble value, gdouble scale)
{ {
@ -250,167 +89,6 @@ update_entry (GtkColorEditor *editor)
g_free (text); g_free (text);
} }
static void
sv_update_color (GtkColorEditor *editor,
gint x,
gint y)
{
GtkWidget *sv_plane;
sv_plane = editor->priv->sv_plane;
editor->priv->x = x;
editor->priv->y = y;
editor->priv->s = CLAMP (1 - y * (1.0 / gtk_widget_get_allocated_height (sv_plane)), 0, 1);
editor->priv->v = CLAMP (x * (1.0 / gtk_widget_get_allocated_width (sv_plane)), 0, 1);
gtk_hsv_to_rgb (editor->priv->h, editor->priv->s, editor->priv->v,
&editor->priv->color.red,
&editor->priv->color.green,
&editor->priv->color.blue);
update_entry (editor);
gtk_adjustment_set_value (editor->priv->h_adj, editor->priv->h);
gtk_widget_queue_draw (editor->priv->swatch);
gtk_widget_queue_draw (sv_plane);
}
static gboolean
sv_button_press (GtkWidget *widget,
GdkEventButton *event,
GtkColorEditor *editor)
{
if (editor->priv->in_drag || event->button != GDK_BUTTON_PRIMARY)
return FALSE;
editor->priv->in_drag = TRUE;
set_cross_grab (widget, gdk_event_get_device ((GdkEvent*)event), event->time);
sv_update_color (editor, event->x, event->y);
gtk_widget_grab_focus (widget);
return TRUE;
}
static gboolean
sv_button_release (GtkWidget *widget,
GdkEventButton *event,
GtkColorEditor *editor)
{
if (!editor->priv->in_drag || event->button != GDK_BUTTON_PRIMARY)
return FALSE;
editor->priv->in_drag = FALSE;
sv_update_color (editor, event->x, event->y);
gdk_device_ungrab (gdk_event_get_device ((GdkEvent *) event), event->time);
return TRUE;
}
static gboolean
sv_motion (GtkWidget *widget,
GdkEventMotion *event,
GtkColorEditor *editor)
{
if (!editor->priv->in_drag)
return FALSE;
gdk_event_request_motions (event);
sv_update_color (editor, event->x, event->y);
return TRUE;
}
static void
sv_move (GtkColorEditor *editor,
gdouble ds,
gdouble dv)
{
if (editor->priv->s + ds > 1)
{
if (editor->priv->s < 1)
editor->priv->s = 1;
else
goto error;
}
else if (editor->priv->s + ds < 0)
{
if (editor->priv->s > 0)
editor->priv->s = 0;
else
goto error;
}
else
{
editor->priv->s += ds;
}
if (editor->priv->v + dv > 1)
{
if (editor->priv->v < 1)
editor->priv->v = 1;
else
goto error;
}
else if (editor->priv->v + dv < 0)
{
if (editor->priv->v > 0)
editor->priv->v = 0;
else
goto error;
}
else
{
editor->priv->v += dv;
}
gtk_hsv_to_rgb (editor->priv->h, editor->priv->s, editor->priv->v,
&editor->priv->color.red,
&editor->priv->color.green,
&editor->priv->color.blue);
hsv_to_xy (editor);
update_entry (editor);
gtk_adjustment_set_value (editor->priv->h_adj, editor->priv->h);
gtk_widget_queue_draw (editor->priv->swatch);
gtk_widget_queue_draw (editor->priv->sv_plane);
return;
error:
gtk_widget_error_bell (editor->priv->sv_plane);
}
static gboolean
sv_key_press (GtkWidget *widget,
GdkEventKey *event,
GtkColorEditor *editor)
{
gdouble step;
/* FIXME: turn into bindings */
if ((event->state & GDK_MOD1_MASK) != 0)
step = 0.1;
else
step = 0.01;
if (event->keyval == GDK_KEY_Up ||
event->keyval == GDK_KEY_KP_Up)
sv_move (editor, step, 0);
else if (event->keyval == GDK_KEY_Down ||
event->keyval == GDK_KEY_KP_Down)
sv_move (editor, -step, 0);
else if (event->keyval == GDK_KEY_Left ||
event->keyval == GDK_KEY_KP_Left)
sv_move (editor, 0, -step);
else if (event->keyval == GDK_KEY_Right ||
event->keyval == GDK_KEY_KP_Right)
sv_move (editor, 0, step);
else
return FALSE;
return TRUE;
}
static void static void
entry_apply (GtkWidget *entry, entry_apply (GtkWidget *entry,
GtkColorEditor *editor) GtkColorEditor *editor)
@ -424,17 +102,8 @@ entry_apply (GtkWidget *entry,
text = gtk_editable_get_chars (GTK_EDITABLE (editor->priv->entry), 0, -1); text = gtk_editable_get_chars (GTK_EDITABLE (editor->priv->entry), 0, -1);
if (gdk_rgba_parse (&color, text)) if (gdk_rgba_parse (&color, text))
{ {
editor->priv->color.red = color.red; color.alpha = editor->priv->color.alpha;
editor->priv->color.green = color.green; gtk_color_chooser_set_color (GTK_COLOR_CHOOSER (editor), &color);
editor->priv->color.blue = color.blue;
gtk_rgb_to_hsv (editor->priv->color.red,
editor->priv->color.green,
editor->priv->color.blue,
&editor->priv->h, &editor->priv->s, &editor->priv->v);
hsv_to_xy (editor);
gtk_adjustment_set_value (editor->priv->h_adj, editor->priv->h);
gtk_widget_queue_draw (GTK_WIDGET (editor));
g_object_notify (G_OBJECT (editor), "color");
} }
editor->priv->text_changed = FALSE; editor->priv->text_changed = FALSE;
@ -464,18 +133,30 @@ h_changed (GtkAdjustment *adj,
GtkColorEditor *editor) GtkColorEditor *editor)
{ {
editor->priv->h = gtk_adjustment_get_value (adj); editor->priv->h = gtk_adjustment_get_value (adj);
gtk_hsv_to_rgb (editor->priv->h, editor->priv->s, editor->priv->v, gtk_hsv_to_rgb (editor->priv->h, editor->priv->s, editor->priv->v,
&editor->priv->color.red, &editor->priv->color.red,
&editor->priv->color.green, &editor->priv->color.green,
&editor->priv->color.blue); &editor->priv->color.blue);
create_sv_surface (editor); gtk_color_plane_set_h (GTK_COLOR_PLANE (editor->priv->sv_plane), editor->priv->h);
gtk_widget_queue_draw (editor->priv->sv_plane);
gtk_widget_queue_draw (editor->priv->swatch); gtk_widget_queue_draw (editor->priv->swatch);
update_entry (editor); update_entry (editor);
g_object_notify (G_OBJECT (editor), "color"); g_object_notify (G_OBJECT (editor), "color");
} }
static void
sv_changed (GtkColorPlane *plane,
GtkColorEditor *editor)
{
editor->priv->s = gtk_color_plane_get_s (plane);
editor->priv->v = gtk_color_plane_get_v (plane);
gtk_hsv_to_rgb (editor->priv->h, editor->priv->s, editor->priv->v,
&editor->priv->color.red,
&editor->priv->color.green,
&editor->priv->color.blue);
update_entry (editor);
gtk_widget_queue_draw (editor->priv->swatch);
}
static void static void
a_changed (GtkAdjustment *adj, a_changed (GtkAdjustment *adj,
GtkColorEditor *editor) GtkColorEditor *editor)
@ -560,31 +241,19 @@ gtk_color_editor_init (GtkColorEditor *editor)
editor->priv->h_adj = adj; editor->priv->h_adj = adj;
gtk_scale_set_draw_value (GTK_SCALE (editor->priv->h_slider), FALSE); gtk_scale_set_draw_value (GTK_SCALE (editor->priv->h_slider), FALSE);
editor->priv->sv_plane = gtk_drawing_area_new (); editor->priv->sv_plane = gtk_color_plane_new ();
gtk_widget_set_size_request (editor->priv->sv_plane, 300, 300); gtk_widget_set_size_request (editor->priv->sv_plane, 300, 300);
gtk_widget_set_hexpand (editor->priv->sv_plane, TRUE); gtk_widget_set_hexpand (editor->priv->sv_plane, TRUE);
gtk_widget_set_vexpand (editor->priv->sv_plane, TRUE); gtk_widget_set_vexpand (editor->priv->sv_plane, TRUE);
g_signal_connect (editor->priv->sv_plane, "changed", G_CALLBACK (sv_changed), editor);
adj = gtk_adjustment_new (1, 0, 1, 0.01, 0.1, 0); adj = gtk_adjustment_new (1, 0, 1, 0.01, 0.1, 0);
editor->priv->a_slider = gtk_scale_new (GTK_ORIENTATION_HORIZONTAL, adj); editor->priv->a_slider = gtk_scale_new (GTK_ORIENTATION_HORIZONTAL, adj);
g_signal_connect (adj, "value-changed", G_CALLBACK (a_changed), editor); g_signal_connect (adj, "value-changed", G_CALLBACK (a_changed), editor);
gtk_scale_set_draw_value (GTK_SCALE (editor->priv->a_slider), FALSE); gtk_scale_set_draw_value (GTK_SCALE (editor->priv->a_slider), FALSE);
editor->priv->a_adj = adj; editor->priv->a_adj = adj;
gtk_widget_set_can_focus (editor->priv->sv_plane, TRUE);
gtk_widget_set_events (editor->priv->sv_plane, GDK_KEY_PRESS_MASK
| GDK_BUTTON_PRESS_MASK
| GDK_BUTTON_RELEASE_MASK
| GDK_POINTER_MOTION_MASK);
g_signal_connect (editor->priv->sv_plane, "draw", G_CALLBACK (sv_draw), editor);
g_signal_connect (editor->priv->sv_plane, "configure-event", G_CALLBACK (sv_configure), editor);
g_signal_connect (editor->priv->sv_plane, "button-press-event", G_CALLBACK (sv_button_press), editor);
g_signal_connect (editor->priv->sv_plane, "button-release-event", G_CALLBACK (sv_button_release), editor);
g_signal_connect (editor->priv->sv_plane, "motion-notify-event", G_CALLBACK (sv_motion), editor);
g_signal_connect (editor->priv->sv_plane, "grab-broken-event", G_CALLBACK (sv_grab_broken), editor);
g_signal_connect (editor->priv->sv_plane, "key-press-event", G_CALLBACK (sv_key_press), editor);
gtk_grid_attach (GTK_GRID (grid), editor->priv->swatch, 1, 0, 1, 1); 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); gtk_grid_attach (GTK_GRID (grid), editor->priv->entry, 2, 0, 1, 1);
gtk_grid_attach (GTK_GRID (grid), editor->priv->h_slider, 0, 1, 1, 1); gtk_grid_attach (GTK_GRID (grid), editor->priv->h_slider, 0, 1, 1, 1);
@ -676,7 +345,9 @@ gtk_color_editor_set_color (GtkColorChooser *chooser,
editor->priv->color.green, editor->priv->color.green,
editor->priv->color.blue, editor->priv->color.blue,
&editor->priv->h, &editor->priv->s, &editor->priv->v); &editor->priv->h, &editor->priv->s, &editor->priv->v);
hsv_to_xy (editor); gtk_color_plane_set_h (GTK_COLOR_PLANE (editor->priv->sv_plane), editor->priv->h);
gtk_color_plane_set_s (GTK_COLOR_PLANE (editor->priv->sv_plane), editor->priv->s);
gtk_color_plane_set_v (GTK_COLOR_PLANE (editor->priv->sv_plane), editor->priv->v);
gtk_adjustment_set_value (editor->priv->h_adj, editor->priv->h); gtk_adjustment_set_value (editor->priv->h_adj, editor->priv->h);
update_entry (editor); update_entry (editor);

455
gtk/gtkcolorplane.c Normal file
View File

@ -0,0 +1,455 @@
/* GTK - The GIMP Toolkit
* Copyright (C) 2012 Red Hat, Inc.
*
* This library 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 of the License, or (at your option) any later version.
*
* This library 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 Lesser General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#include "config.h"
#include "gtkhsv.h"
#include "gtkcolorplane.h"
struct _GtkColorPlanePrivate
{
cairo_surface_t *surface;
gdouble h, s, v;
gint x, y;
gboolean in_drag;
};
enum
{
CHANGED,
LAST_SIGNAL
};
guint signals[LAST_SIGNAL];
G_DEFINE_TYPE (GtkColorPlane, gtk_color_plane, GTK_TYPE_DRAWING_AREA)
static gboolean
sv_draw (GtkWidget *widget,
cairo_t *cr)
{
GtkColorPlane *plane = GTK_COLOR_PLANE (widget);
gint x, y;
gint width, height;
cairo_set_source_surface (cr, plane->priv->surface, 0, 0);
cairo_paint (cr);
x = plane->priv->x;
y = plane->priv->y;
width = gtk_widget_get_allocated_width (widget);
height = gtk_widget_get_allocated_height (widget);
cairo_move_to (cr, 0, y + 0.5);
cairo_line_to (cr, width, y + 0.5);
cairo_move_to (cr, x + 0.5, 0);
cairo_line_to (cr, x + 0.5, height);
if (gtk_widget_has_visible_focus (widget))
{
cairo_set_line_width (cr, 3.0);
cairo_set_source_rgba (cr, 1.0, 1.0, 1.0, 0.6);
cairo_stroke_preserve (cr);
cairo_set_line_width (cr, 1.0);
cairo_set_source_rgba (cr, 0.0, 0.0, 0.0, 0.8);
cairo_stroke (cr);
}
else
{
cairo_set_line_width (cr, 1.0);
cairo_set_source_rgba (cr, 0.8, 0.8, 0.8, 0.8);
cairo_stroke (cr);
}
return FALSE;
}
static void
create_sv_surface (GtkColorPlane *plane)
{
GtkWidget *widget = GTK_WIDGET (plane);
cairo_t *cr;
cairo_surface_t *surface;
gint width, height, stride;
cairo_surface_t *tmp;
guint red, green, blue;
guint32 *data, *p;
gdouble h, s, v;
gdouble r, g, b;
gdouble sf, vf;
gint x, y;
if (!gtk_widget_get_realized (widget))
return;
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 (plane->priv->surface)
cairo_surface_destroy (plane->priv->surface);
plane->priv->surface = surface;
if (width == 1 || height == 1)
return;
stride = cairo_format_stride_for_width (CAIRO_FORMAT_RGB24, width);
data = g_malloc (4 * height * stride);
h = plane->priv->h;
sf = 1.0 / (height - 1);
vf = 1.0 / (width - 1);
for (y = 0; y < height; y++)
{
s = CLAMP (1.0 - y * sf, 0.0, 1.0);
p = data + y * (stride / 4);
for (x = 0; x < width; x++)
{
v = x * vf;
gtk_hsv_to_rgb (h, s, v, &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);
}
static void
hsv_to_xy (GtkColorPlane *plane)
{
gint width, height;
width = gtk_widget_get_allocated_width (GTK_WIDGET (plane));
height = gtk_widget_get_allocated_height (GTK_WIDGET (plane));
plane->priv->x = CLAMP (width * plane->priv->v, 0, width - 1);
plane->priv->y = CLAMP (height * (1 - plane->priv->s), 0, height - 1);
}
static gboolean
sv_configure (GtkWidget *widget,
GdkEventConfigure *event)
{
GtkColorPlane *plane = GTK_COLOR_PLANE (widget);
create_sv_surface (plane);
hsv_to_xy (plane);
return TRUE;
}
static void
set_cross_grab (GtkWidget *widget,
GdkDevice *device,
guint32 time)
{
GdkCursor *cursor;
cursor = gdk_cursor_new_for_display (gtk_widget_get_display (GTK_WIDGET (widget)),
GDK_CROSSHAIR);
gdk_device_grab (device,
gtk_widget_get_window (widget),
GDK_OWNERSHIP_NONE,
FALSE,
GDK_POINTER_MOTION_MASK
| GDK_POINTER_MOTION_HINT_MASK
| GDK_BUTTON_RELEASE_MASK,
cursor,
time);
g_object_unref (cursor);
}
static gboolean
sv_grab_broken (GtkWidget *widget,
GdkEventGrabBroken *event)
{
GtkColorPlane *plane = GTK_COLOR_PLANE (widget);
plane->priv->in_drag = FALSE;
return TRUE;
}
static void
sv_update_color (GtkColorPlane *plane,
gint x,
gint y)
{
GtkWidget *widget = GTK_WIDGET (plane);
plane->priv->x = x;
plane->priv->y = y;
plane->priv->s = CLAMP (1 - y * (1.0 / gtk_widget_get_allocated_height (widget)), 0, 1);
plane->priv->v = CLAMP (x * (1.0 / gtk_widget_get_allocated_width (widget)), 0, 1);
g_signal_emit (plane, signals[CHANGED], 0);
gtk_widget_queue_draw (widget);
}
static gboolean
sv_button_press (GtkWidget *widget,
GdkEventButton *event)
{
GtkColorPlane *plane = GTK_COLOR_PLANE (widget);
if (plane->priv->in_drag || event->button != GDK_BUTTON_PRIMARY)
return FALSE;
plane->priv->in_drag = TRUE;
set_cross_grab (widget, gdk_event_get_device ((GdkEvent*)event), event->time);
sv_update_color (plane, event->x, event->y);
gtk_widget_grab_focus (widget);
return TRUE;
}
static gboolean
sv_button_release (GtkWidget *widget,
GdkEventButton *event)
{
GtkColorPlane *plane = GTK_COLOR_PLANE (widget);
if (!plane->priv->in_drag || event->button != GDK_BUTTON_PRIMARY)
return FALSE;
plane->priv->in_drag = FALSE;
sv_update_color (plane, event->x, event->y);
gdk_device_ungrab (gdk_event_get_device ((GdkEvent *) event), event->time);
return TRUE;
}
static gboolean
sv_motion (GtkWidget *widget,
GdkEventMotion *event)
{
GtkColorPlane *plane = GTK_COLOR_PLANE (widget);
if (!plane->priv->in_drag)
return FALSE;
gdk_event_request_motions (event);
sv_update_color (plane, event->x, event->y);
return TRUE;
}
static void
sv_move (GtkColorPlane *plane,
gdouble ds,
gdouble dv)
{
if (plane->priv->s + ds > 1)
{
if (plane->priv->s < 1)
plane->priv->s = 1;
else
goto error;
}
else if (plane->priv->s + ds < 0)
{
if (plane->priv->s > 0)
plane->priv->s = 0;
else
goto error;
}
else
{
plane->priv->s += ds;
}
if (plane->priv->v + dv > 1)
{
if (plane->priv->v < 1)
plane->priv->v = 1;
else
goto error;
}
else if (plane->priv->v + dv < 0)
{
if (plane->priv->v > 0)
plane->priv->v = 0;
else
goto error;
}
else
{
plane->priv->v += dv;
}
hsv_to_xy (plane);
g_signal_emit (plane, signals[CHANGED], 0);
gtk_widget_queue_draw (GTK_WIDGET (plane));
return;
error:
gtk_widget_error_bell (GTK_WIDGET (plane));
}
static gboolean
sv_key_press (GtkWidget *widget,
GdkEventKey *event)
{
GtkColorPlane *plane = GTK_COLOR_PLANE (widget);
gdouble step;
/* FIXME: turn into bindings */
if ((event->state & GDK_MOD1_MASK) != 0)
step = 0.1;
else
step = 0.01;
if (event->keyval == GDK_KEY_Up ||
event->keyval == GDK_KEY_KP_Up)
sv_move (plane, step, 0);
else if (event->keyval == GDK_KEY_Down ||
event->keyval == GDK_KEY_KP_Down)
sv_move (plane, -step, 0);
else if (event->keyval == GDK_KEY_Left ||
event->keyval == GDK_KEY_KP_Left)
sv_move (plane, 0, -step);
else if (event->keyval == GDK_KEY_Right ||
event->keyval == GDK_KEY_KP_Right)
sv_move (plane, 0, step);
else
return FALSE;
return TRUE;
}
static void
gtk_color_plane_init (GtkColorPlane *plane)
{
plane->priv = G_TYPE_INSTANCE_GET_PRIVATE (plane,
GTK_TYPE_COLOR_PLANE,
GtkColorPlanePrivate);
gtk_widget_set_can_focus (GTK_WIDGET (plane), TRUE);
gtk_widget_set_events (GTK_WIDGET (plane), GDK_KEY_PRESS_MASK
| GDK_BUTTON_PRESS_MASK
| GDK_BUTTON_RELEASE_MASK
| GDK_POINTER_MOTION_MASK);
}
static void
sv_finalize (GObject *object)
{
GtkColorPlane *plane = GTK_COLOR_PLANE (object);
cairo_surface_destroy (plane->priv->surface);
G_OBJECT_CLASS (gtk_color_plane_parent_class)->finalize (object);
}
static void
gtk_color_plane_class_init (GtkColorPlaneClass *class)
{
GObjectClass *object_class = G_OBJECT_CLASS (class);
GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (class);
object_class->finalize = sv_finalize;
widget_class->draw = sv_draw;
widget_class->configure_event = sv_configure;
widget_class->button_press_event = sv_button_press;
widget_class->button_release_event = sv_button_release;
widget_class->motion_notify_event = sv_motion;
widget_class->grab_broken_event = sv_grab_broken;
widget_class->key_press_event = sv_key_press;
signals[CHANGED] =
g_signal_new ("changed",
GTK_TYPE_COLOR_PLANE,
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (GtkColorPlaneClass, changed),
NULL, NULL,
NULL,
G_TYPE_NONE, 0);
g_type_class_add_private (class, sizeof (GtkColorPlanePrivate));
}
gdouble
gtk_color_plane_get_h (GtkColorPlane *plane)
{
return plane->priv->h;
}
gdouble
gtk_color_plane_get_s (GtkColorPlane *plane)
{
return plane->priv->s;
}
gdouble
gtk_color_plane_get_v (GtkColorPlane *plane)
{
return plane->priv->v;
}
void
gtk_color_plane_set_h (GtkColorPlane *plane,
gdouble h)
{
plane->priv->h = h;
create_sv_surface (plane);
gtk_widget_queue_draw (GTK_WIDGET (plane));
}
void
gtk_color_plane_set_s (GtkColorPlane *plane,
gdouble s)
{
plane->priv->s = s;
hsv_to_xy (plane);
gtk_widget_queue_draw (GTK_WIDGET (plane));
}
void
gtk_color_plane_set_v (GtkColorPlane *plane,
gdouble v)
{
plane->priv->v = v;
hsv_to_xy (plane);
gtk_widget_queue_draw (GTK_WIDGET (plane));
}
GtkWidget *
gtk_color_plane_new (void)
{
return (GtkWidget *) g_object_new (GTK_TYPE_COLOR_PLANE, NULL);
}

80
gtk/gtkcolorplane.h Normal file
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@ -0,0 +1,80 @@
/* GTK - The GIMP Toolkit
* Copyright (C) 2012 Red Hat, Inc.
*
* This library 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 of the License, or (at your option) any later version.
*
* This library 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 Lesser General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#if !defined (__GTK_H_INSIDE__) && !defined (GTK_COMPILATION)
#error "Only <gtk/gtk.h> can be included directly."
#endif
#ifndef __GTK_COLOR_PLANE_H__
#define __GTK_COLOR_PLANE_H__
#include <gtk/gtkdrawingarea.h>
G_BEGIN_DECLS
#define GTK_TYPE_COLOR_PLANE (gtk_color_plane_get_type ())
#define GTK_COLOR_PLANE(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GTK_TYPE_COLOR_PLANE, GtkColorPlane))
#define GTK_COLOR_PLANE_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GTK_TYPE_COLOR_PLANE, GtkColorPlaneClass))
#define GTK_IS_COLOR_PLANE(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GTK_TYPE_COLOR_PLANE))
#define GTK_IS_COLOR_PLANE_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GTK_TYPE_COLOR_PLANE))
#define GTK_COLOR_PLANE_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GTK_TYPE_COLOR_PLANE, GtkColorPlaneClass))
typedef struct _GtkColorPlane GtkColorPlane;
typedef struct _GtkColorPlaneClass GtkColorPlaneClass;
typedef struct _GtkColorPlanePrivate GtkColorPlanePrivate;
struct _GtkColorPlane
{
GtkDrawingArea parent_instance;
GtkColorPlanePrivate *priv;
};
struct _GtkColorPlaneClass
{
GtkDrawingAreaClass parent_class;
void (* changed) (GtkColorPlane *plane);
/* Padding for future expansion */
void (*_gtk_reserved1) (void);
void (*_gtk_reserved2) (void);
void (*_gtk_reserved3) (void);
void (*_gtk_reserved4) (void);
};
GType gtk_color_plane_get_type (void) G_GNUC_CONST;
GtkWidget * gtk_color_plane_new (void);
gdouble gtk_color_plane_get_h (GtkColorPlane *plane);
void gtk_color_plane_set_h (GtkColorPlane *plane,
gdouble h);
gdouble gtk_color_plane_get_s (GtkColorPlane *plane);
void gtk_color_plane_set_s (GtkColorPlane *plane,
gdouble s);
gdouble gtk_color_plane_get_v (GtkColorPlane *plane);
void gtk_color_plane_set_v (GtkColorPlane *plane,
gdouble v);
G_END_DECLS
#endif /* __GTK_COLOR_PLANE_H__ */