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app: add keyboard control to GimpToolLine 

Add support for moving the selected handle using the arrow keys,
with the same modifiers as GimpToolPath.
This commit is contained in:
Ell 2017-07-19 16:04:19 -04:00
parent d4cb1623ea
commit 63ccbc4fb0
1 changed files with 128 additions and 0 deletions
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128
app/display/gimptoolline.c
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@ -25,6 +25,7 @@
#include <gegl.h>
#include <gtk/gtk.h>
#include <gdk/gdkkeysyms.h>
#include "libgimpbase/gimpbase.h"
#include "libgimpmath/gimpmath.h"
@ -141,6 +142,8 @@ static void gimp_tool_line_hover (GimpToolWidget *widget,
const GimpCoords *coords,
GdkModifierType state,
gboolean proximity);
static gboolean gimp_tool_line_key_press (GimpToolWidget *widget,
GdkEventKey *kevent);
static void gimp_tool_line_motion_modifier (GimpToolWidget *widget,
GdkModifierType key,
gboolean press,
@ -198,6 +201,7 @@ gimp_tool_line_class_init (GimpToolLineClass *klass)
widget_class->button_release = gimp_tool_line_button_release;
widget_class->motion = gimp_tool_line_motion;
widget_class->hover = gimp_tool_line_hover;
widget_class->key_press = gimp_tool_line_key_press;
widget_class->motion_modifier = gimp_tool_line_motion_modifier;
widget_class->get_cursor = gimp_tool_line_get_cursor;
@ -689,6 +693,130 @@ gimp_tool_line_hover (GimpToolWidget *widget,
gimp_tool_line_update_status (line, state, proximity);
}
static gboolean
gimp_tool_line_key_press (GimpToolWidget *widget,
GdkEventKey *kevent)
{
GimpToolLine *line = GIMP_TOOL_LINE (widget);
GimpToolLinePrivate *private = line->private;
GimpDisplayShell *shell;
gdouble pixels = 1.0;
gboolean move_line;
move_line = kevent->state & GRAB_LINE_MASK;
if (private->selection == GIMP_TOOL_LINE_HANDLE_NONE && ! move_line)
return GIMP_TOOL_WIDGET_CLASS (parent_class)->key_press (widget, kevent);
shell = gimp_tool_widget_get_shell (widget);
if (kevent->state & gimp_get_extend_selection_mask ())
pixels = 10.0;
if (kevent->state & gimp_get_toggle_behavior_mask ())
pixels = 50.0;
switch (kevent->keyval)
{
case GDK_KEY_Left:
case GDK_KEY_Right:
case GDK_KEY_Up:
case GDK_KEY_Down:
/* move an endpoint (or both endpoints) */
if (private->selection < 0 || move_line)
{
gdouble xdist, ydist;
gdouble dx, dy;
xdist = FUNSCALEX (shell, pixels);
ydist = FUNSCALEY (shell, pixels);
dx = 0.0;
dy = 0.0;
switch (kevent->keyval)
{
case GDK_KEY_Left: dx = -xdist; break;
case GDK_KEY_Right: dx = +xdist; break;
case GDK_KEY_Up: dy = -ydist; break;
case GDK_KEY_Down: dy = +ydist; break;
}
if (private->selection == GIMP_TOOL_LINE_HANDLE_START || move_line)
{
g_object_set (line,
"x1", private->x1 + dx,
"y1", private->y1 + dy,
NULL);
}
if (private->selection == GIMP_TOOL_LINE_HANDLE_END || move_line)
{
g_object_set (line,
"x2", private->x2 + dx,
"y2", private->y2 + dy,
NULL);
}
}
/* move a slider */
else
{
gdouble dist;
gdouble dvalue;
dist = gimp_canvas_item_transform_distance (private->line,
private->x1, private->y1,
private->x2, private->y2);
if (dist > 0.0)
dist = pixels / dist;
dvalue = 0.0;
switch (kevent->keyval)
{
case GDK_KEY_Left:
if (private->x1 < private->x2) dvalue = -dist;
else if (private->x1 > private->x2) dvalue = +dist;
break;
case GDK_KEY_Right:
if (private->x1 < private->x2) dvalue = +dist;
else if (private->x1 > private->x2) dvalue = -dist;
break;
case GDK_KEY_Up:
if (private->y1 < private->y2) dvalue = -dist;
else if (private->y1 > private->y2) dvalue = +dist;
break;
case GDK_KEY_Down:
if (private->y1 < private->y2) dvalue = +dist;
else if (private->y1 > private->y2) dvalue = -dist;
break;
}
if (dvalue != 0.0)
{
GimpControllerSlider *slider;
slider = gimp_tool_line_get_slider (line, private->selection);
slider->value += dvalue;
slider->value = CLAMP (slider->value, slider->min, slider->max);
slider->value = CLAMP (slider->value, 0.0, 1.0);
g_object_set (line,
"sliders", private->sliders,
NULL);
}
}
return TRUE;
}
return GIMP_TOOL_WIDGET_CLASS (parent_class)->key_press (widget, kevent);
}
static void
gimp_tool_line_motion_modifier (GimpToolWidget *widget,
GdkModifierType key,