/* PIKA - Photo and Image Kooker Application * a rebranding of The GNU Image Manipulation Program (created with heckimp) * A derived work which may be trivial. However, any changes may be (C)2023 by Aldercone Studio * * Original copyright, applying to most contents (license remains unchanged): * Copyright (C) 1995 Spencer Kimball and Peter Mattis * * pikaspinscale.c * Copyright (C) 2010 Michael Natterer * 2012 Øyvind Kolås * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 3 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 General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see . */ #include "config.h" #include #include #include #include "libpikabase/pikabase.h" #include "libpikamath/pikamath.h" #include "pikawidgetstypes.h" #include "pikaspinscale.h" #include "libpika/libpika-intl.h" #define RELATIVE_CHANGE_SPEED 0.1 enum { PROP_0, PROP_LABEL }; typedef enum { TARGET_NONE, TARGET_NUMBER, TARGET_GRAB, TARGET_GRABBING, TARGET_RELATIVE } SpinScaleTarget; typedef struct _PikaSpinScalePrivate PikaSpinScalePrivate; struct _PikaSpinScalePrivate { gchar *label; gchar *label_text; gchar *label_pattern; GtkWindow *mnemonic_window; guint mnemonic_keyval; gboolean mnemonics_visible; gboolean constrain_drag; gboolean scale_limits_set; gdouble scale_lower; gdouble scale_upper; gdouble gamma; PangoLayout *layout; gboolean changing_value; gboolean relative_change; gdouble start_x; gdouble start_value; gint start_pointer_x; gint start_pointer_y; SpinScaleTarget target; gboolean hover; gboolean pointer_warp; gint pointer_warp_x; gint pointer_warp_start_x; }; #define GET_PRIVATE(obj) ((PikaSpinScalePrivate *) pika_spin_scale_get_instance_private ((PikaSpinScale *) (obj))) static void pika_spin_scale_dispose (GObject *object); static void pika_spin_scale_finalize (GObject *object); static void pika_spin_scale_set_property (GObject *object, guint property_id, const GValue *value, GParamSpec *pspec); static void pika_spin_scale_get_property (GObject *object, guint property_id, GValue *value, GParamSpec *pspec); static void pika_spin_scale_get_preferred_width (GtkWidget *widget, gint *minimum_width, gint *natural_width); static void pika_spin_scale_get_preferred_height (GtkWidget *widget, gint *minimum_width, gint *natural_width); static void pika_spin_scale_style_updated (GtkWidget *widget); static gboolean pika_spin_scale_draw (GtkWidget *widget, cairo_t *cr); static gboolean pika_spin_scale_button_press (GtkWidget *widget, GdkEventButton *event); static gboolean pika_spin_scale_button_release (GtkWidget *widget, GdkEventButton *event); static gboolean pika_spin_scale_motion_notify (GtkWidget *widget, GdkEventMotion *event); static gboolean pika_spin_scale_leave_notify (GtkWidget *widget, GdkEventCrossing *event); static void pika_spin_scale_hierarchy_changed (GtkWidget *widget, GtkWidget *old_toplevel); static void pika_spin_scale_screen_changed (GtkWidget *widget, GdkScreen *old_screen); static void pika_spin_scale_value_changed (GtkSpinButton *spin_button); static void pika_spin_scale_settings_notify (GtkSettings *settings, const GParamSpec *pspec, PikaSpinScale *scale); static void pika_spin_scale_mnemonics_notify (GtkWindow *window, const GParamSpec *pspec, PikaSpinScale *scale); static void pika_spin_scale_setup_mnemonic (PikaSpinScale *scale, guint previous_keyval); static gdouble odd_pow (gdouble x, gdouble y); G_DEFINE_TYPE_WITH_PRIVATE (PikaSpinScale, pika_spin_scale, PIKA_TYPE_SPIN_BUTTON) #define parent_class pika_spin_scale_parent_class static void pika_spin_scale_class_init (PikaSpinScaleClass *klass) { GObjectClass *object_class = G_OBJECT_CLASS (klass); GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass); GtkSpinButtonClass *spin_button_class = GTK_SPIN_BUTTON_CLASS (klass); object_class->dispose = pika_spin_scale_dispose; object_class->finalize = pika_spin_scale_finalize; object_class->set_property = pika_spin_scale_set_property; object_class->get_property = pika_spin_scale_get_property; widget_class->get_preferred_width = pika_spin_scale_get_preferred_width; widget_class->get_preferred_height = pika_spin_scale_get_preferred_height; widget_class->style_updated = pika_spin_scale_style_updated; widget_class->draw = pika_spin_scale_draw; widget_class->button_press_event = pika_spin_scale_button_press; widget_class->button_release_event = pika_spin_scale_button_release; widget_class->motion_notify_event = pika_spin_scale_motion_notify; widget_class->leave_notify_event = pika_spin_scale_leave_notify; widget_class->hierarchy_changed = pika_spin_scale_hierarchy_changed; widget_class->screen_changed = pika_spin_scale_screen_changed; spin_button_class->value_changed = pika_spin_scale_value_changed; g_object_class_install_property (object_class, PROP_LABEL, g_param_spec_string ("label", NULL, NULL, NULL, PIKA_PARAM_READWRITE)); gtk_widget_class_set_css_name (widget_class, "PikaSpinScale"); } static void pika_spin_scale_init (PikaSpinScale *scale) { PikaSpinScalePrivate *private = GET_PRIVATE (scale); gtk_widget_add_events (GTK_WIDGET (scale), GDK_BUTTON_PRESS_MASK | GDK_BUTTON_RELEASE_MASK | GDK_POINTER_MOTION_MASK | GDK_BUTTON1_MOTION_MASK | GDK_LEAVE_NOTIFY_MASK); gtk_entry_set_alignment (GTK_ENTRY (scale), 1.0); gtk_spin_button_set_numeric (GTK_SPIN_BUTTON (scale), TRUE); private->mnemonic_keyval = GDK_KEY_VoidSymbol; private->gamma = 1.0; } static void pika_spin_scale_dispose (GObject *object) { PikaSpinScalePrivate *private = GET_PRIVATE (object); guint keyval; keyval = private->mnemonic_keyval; private->mnemonic_keyval = GDK_KEY_VoidSymbol; pika_spin_scale_setup_mnemonic (PIKA_SPIN_SCALE (object), keyval); g_clear_object (&private->layout); G_OBJECT_CLASS (parent_class)->dispose (object); } static void pika_spin_scale_finalize (GObject *object) { PikaSpinScalePrivate *private = GET_PRIVATE (object); g_clear_pointer (&private->label, g_free); g_clear_pointer (&private->label_text, g_free); g_clear_pointer (&private->label_pattern, g_free); G_OBJECT_CLASS (parent_class)->finalize (object); } static void pika_spin_scale_set_property (GObject *object, guint property_id, const GValue *value, GParamSpec *pspec) { PikaSpinScale *scale = PIKA_SPIN_SCALE (object); switch (property_id) { case PROP_LABEL: pika_spin_scale_set_label (scale, g_value_get_string (value)); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec); break; } } static void pika_spin_scale_get_property (GObject *object, guint property_id, GValue *value, GParamSpec *pspec) { PikaSpinScale *scale = PIKA_SPIN_SCALE (object); switch (property_id) { case PROP_LABEL: g_value_set_string (value, pika_spin_scale_get_label (scale)); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec); break; } } static void pika_spin_scale_get_preferred_width (GtkWidget *widget, gint *minimum_width, gint *natural_width) { PikaSpinScalePrivate *private = GET_PRIVATE (widget); PangoContext *context = gtk_widget_get_pango_context (widget); PangoFontMetrics *metrics; GTK_WIDGET_CLASS (parent_class)->get_preferred_width (widget, minimum_width, natural_width); metrics = pango_context_get_metrics (context, pango_context_get_font_description (context), pango_context_get_language (context)); if (private->label) { gint char_width; gint digit_width; gint char_pixels; char_width = pango_font_metrics_get_approximate_char_width (metrics); digit_width = pango_font_metrics_get_approximate_digit_width (metrics); char_pixels = PANGO_PIXELS (MAX (char_width, digit_width)); /* ~3 chars for the ellipses */ *minimum_width += char_pixels * 3; *natural_width += char_pixels * 3; } pango_font_metrics_unref (metrics); } static void pika_spin_scale_get_preferred_height (GtkWidget *widget, gint *minimum_height, gint *natural_height) { GTK_WIDGET_CLASS (parent_class)->get_preferred_height (widget, minimum_height, natural_height); } static void pika_spin_scale_style_updated (GtkWidget *widget) { PikaSpinScalePrivate *private = GET_PRIVATE (widget); GTK_WIDGET_CLASS (parent_class)->style_updated (widget); g_clear_object (&private->layout); } static PangoAttrList * pattern_to_attrs (const gchar *text, const gchar *pattern) { PangoAttrList *attrs = pango_attr_list_new (); const char *p = text; const char *q = pattern; const char *start; while (TRUE) { while (*p && q && *q != '_') { p = g_utf8_next_char (p); q++; } start = p; while (*p && *q && *q == '_') { p = g_utf8_next_char (p); q++; } if (p > start) { PangoAttribute *attr = pango_attr_underline_new (PANGO_UNDERLINE_LOW); attr->start_index = start - text; attr->end_index = p - text; pango_attr_list_insert (attrs, attr); } else break; } return attrs; } static gboolean pika_spin_scale_draw (GtkWidget *widget, cairo_t *cr) { PikaSpinScalePrivate *private = GET_PRIVATE (widget); cairo_save (cr); GTK_WIDGET_CLASS (parent_class)->draw (widget, cr); cairo_restore (cr); if (private->label) { GtkStyleContext *style = gtk_widget_get_style_context (widget); GtkAllocation allocation; GdkRectangle text_area; GtkStateFlags state; gint minimum_width; gint natural_width; PangoRectangle ink; gint layout_offset_x; gint layout_offset_y; GdkRGBA text_color; GdkRGBA bar_text_color; gdouble progress_fraction; gdouble progress_x; gdouble progress_y; gdouble progress_width; gdouble progress_height; gtk_widget_get_allocation (widget, &allocation); gtk_entry_get_text_area (GTK_ENTRY (widget), &text_area); state = gtk_widget_get_state_flags (widget); GTK_WIDGET_CLASS (parent_class)->get_preferred_width (widget, &minimum_width, &natural_width); if (! private->layout) { private->layout = gtk_widget_create_pango_layout (widget, private->label_text); pango_layout_set_ellipsize (private->layout, PANGO_ELLIPSIZE_END); /* Needing to force right-to-left layout when the widget is * set so, even when the text is not RTL text. Without this, * such case is broken because on the left side, we'd have * both the value and the label texts. */ pango_layout_set_auto_dir (private->layout, FALSE); if (private->mnemonics_visible) { PangoAttrList *attrs; attrs = pattern_to_attrs (private->label_text, private->label_pattern); if (attrs) { pango_layout_set_attributes (private->layout, attrs); pango_attr_list_unref (attrs); } } } pango_layout_set_width (private->layout, PANGO_SCALE * (allocation.width - minimum_width)); pango_layout_get_pixel_extents (private->layout, &ink, NULL); gtk_entry_get_layout_offsets (GTK_ENTRY (widget), NULL, &layout_offset_y); if (gtk_widget_get_direction (widget) == GTK_TEXT_DIR_RTL) layout_offset_x = text_area.x + text_area.width - ink.width - 2; else layout_offset_x = text_area.x + 2; layout_offset_x -= ink.x; gtk_style_context_get_color (style, state, &text_color); gtk_style_context_save (style); gtk_style_context_add_class (style, GTK_STYLE_CLASS_PROGRESSBAR); gtk_style_context_get_color (style, state, &bar_text_color); gtk_style_context_restore (style); progress_fraction = gtk_entry_get_progress_fraction (GTK_ENTRY (widget)); progress_y = 0.0; progress_width = (gdouble) text_area.width * progress_fraction; progress_height = text_area.height; if (gtk_widget_get_direction (widget) == GTK_TEXT_DIR_RTL) progress_x = text_area.width + text_area.x - progress_width; else progress_x = text_area.x; cairo_save (cr); cairo_set_fill_rule (cr, CAIRO_FILL_RULE_EVEN_ODD); cairo_rectangle (cr, 0, 0, text_area.width, text_area.height); cairo_rectangle (cr, progress_x, progress_y, progress_width, progress_height); cairo_clip (cr); cairo_set_fill_rule (cr, CAIRO_FILL_RULE_WINDING); /* Center the label on the widget text area. Do not necessarily * try to align the label with the number characters in the entry * layout, because the size might actually be different, in * particular when the label's actual font ends up different * (typically when displaying non-Western languages). */ cairo_move_to (cr, layout_offset_x, text_area.y - ink.y + text_area.height / 2 - ink.height / 2); gdk_cairo_set_source_rgba (cr, &text_color); pango_cairo_show_layout (cr, private->layout); cairo_restore (cr); cairo_rectangle (cr, progress_x, progress_y, progress_width, progress_height); cairo_clip (cr); cairo_move_to (cr, layout_offset_x, text_area.y - ink.y + text_area.height / 2 - ink.height / 2); gdk_cairo_set_source_rgba (cr, &bar_text_color); pango_cairo_show_layout (cr, private->layout); } return FALSE; } /* Returns TRUE if a translation should be done */ static gboolean gtk_widget_get_translation_to_window (GtkWidget *widget, GdkWindow *window, int *x, int *y) { GdkWindow *w, *widget_window; if (!gtk_widget_get_has_window (widget)) { GtkAllocation allocation; gtk_widget_get_allocation (widget, &allocation); *x = -allocation.x; *y = -allocation.y; } else { *x = 0; *y = 0; } widget_window = gtk_widget_get_window (widget); for (w = window; w && w != widget_window; w = gdk_window_get_parent (w)) { int wx, wy; gdk_window_get_position (w, &wx, &wy); *x += wx; *y += wy; } if (w == NULL) { *x = 0; *y = 0; return FALSE; } return TRUE; } static void pika_spin_scale_event_to_widget_coords (GtkWidget *widget, GdkWindow *window, gdouble event_x, gdouble event_y, gdouble *widget_x, gdouble *widget_y) { GdkRectangle text_area; gint tx, ty; gtk_entry_get_text_area (GTK_ENTRY (widget), &text_area); if (gtk_widget_get_translation_to_window (widget, window, &tx, &ty)) { event_x += tx; event_y += ty; } *widget_x = event_x - text_area.x; *widget_y = event_y - text_area.y; } static SpinScaleTarget pika_spin_scale_get_target (GtkWidget *widget, gdouble x, gdouble y, GdkEvent *event) { GdkRectangle text_area; gtk_entry_get_text_area (GTK_ENTRY (widget), &text_area); if (x >= 0 && x < text_area.width && y >= 0 && y < text_area.height) { PangoRectangle logical; gint layout_x; gint layout_y; if (! event) return TARGET_GRAB; gtk_entry_get_layout_offsets (GTK_ENTRY (widget), &layout_x, &layout_y); pango_layout_get_pixel_extents (gtk_entry_get_layout (GTK_ENTRY (widget)), NULL, &logical); layout_x -= text_area.x; layout_y -= text_area.y; if (event->type != GDK_MOTION_NOTIFY) { GdkEventButton *event_button = (GdkEventButton *) event; switch (event_button->button) { case 1: if (event_button->state & GDK_SHIFT_MASK) return TARGET_RELATIVE; else /* Button 1 target depends on the cursor position. */ break; case 3: return TARGET_RELATIVE; default: return TARGET_NUMBER; } } else { GdkEventMotion *event_motion = (GdkEventMotion *) event; if (event_motion->state & GDK_SHIFT_MASK) return TARGET_RELATIVE; } /* For motion events or main button clicks, the target depends on * the position. */ if (x >= layout_x && x < layout_x + logical.width && y >= layout_y && y < layout_y + logical.height) { return TARGET_NUMBER; } else if (event->type == GDK_MOTION_NOTIFY) { return TARGET_GRAB; } else { return TARGET_GRABBING; } } return TARGET_NONE; } static void pika_spin_scale_update_cursor (GtkWidget *widget, GdkWindow *window) { PikaSpinScalePrivate *private = GET_PRIVATE (widget); GdkDisplay *display = gtk_widget_get_display (widget); GdkCursor *cursor = NULL; switch (private->target) { case TARGET_NUMBER: cursor = gdk_cursor_new_from_name (display, "text"); break; case TARGET_GRAB: cursor = gdk_cursor_new_from_name (display, "grab"); break; case TARGET_GRABBING: cursor = gdk_cursor_new_from_name (display, "grabbing"); break; case TARGET_RELATIVE: cursor = gdk_cursor_new_from_name (display, "col-resize"); break; default: break; } gdk_window_set_cursor (window, cursor); g_clear_object (&cursor); } static void pika_spin_scale_update_target (GtkWidget *widget, GdkWindow *window, gdouble x, gdouble y, GdkEvent *event) { PikaSpinScalePrivate *private = GET_PRIVATE (widget); SpinScaleTarget target; target = pika_spin_scale_get_target (widget, x, y, (GdkEvent *) event); if (target != private->target) { private->target = target; pika_spin_scale_update_cursor (widget, window); } } static void pika_spin_scale_clear_target (GtkWidget *widget, GdkWindow *window) { PikaSpinScalePrivate *private = GET_PRIVATE (widget); if (private->target != TARGET_NONE) { private->target = TARGET_NONE; pika_spin_scale_update_cursor (widget, window); } } static void pika_spin_scale_get_limits (PikaSpinScale *scale, gdouble *lower, gdouble *upper) { PikaSpinScalePrivate *private = GET_PRIVATE (scale); if (private->scale_limits_set) { *lower = private->scale_lower; *upper = private->scale_upper; } else { GtkSpinButton *spin_button = GTK_SPIN_BUTTON (scale); GtkAdjustment *adjustment = gtk_spin_button_get_adjustment (spin_button); *lower = gtk_adjustment_get_lower (adjustment); *upper = gtk_adjustment_get_upper (adjustment); } } static void pika_spin_scale_change_value (GtkWidget *widget, gdouble x, guint state) { PikaSpinScalePrivate *private = GET_PRIVATE (widget); GtkSpinButton *spin_button = GTK_SPIN_BUTTON (widget); GtkAdjustment *adjustment = gtk_spin_button_get_adjustment (spin_button); GdkRectangle text_area; gdouble lower; gdouble upper; gdouble value; gint digits; gint power = 1; gtk_entry_get_text_area (GTK_ENTRY (widget), &text_area); pika_spin_scale_get_limits (PIKA_SPIN_SCALE (widget), &lower, &upper); if (gtk_widget_get_direction (widget) == GTK_TEXT_DIR_RTL) x = text_area.width - x; if (private->relative_change) { gdouble step; step = (upper - lower) / text_area.width * RELATIVE_CHANGE_SPEED; if (gtk_widget_get_direction (widget) == GTK_TEXT_DIR_RTL) step *= x - (text_area.width - private->start_x); else step *= x - private->start_x; if (state & GDK_CONTROL_MASK) { gdouble page_inc = gtk_adjustment_get_page_increment (adjustment); step = RINT (step / page_inc) * page_inc; } value = private->start_value + step; } else { gdouble x0, x1; gdouble fraction; x0 = odd_pow (lower, 1.0 / private->gamma); x1 = odd_pow (upper, 1.0 / private->gamma); fraction = x / (gdouble) text_area.width; value = fraction * (x1 - x0) + x0; value = odd_pow (value, private->gamma); if (state & GDK_CONTROL_MASK) { gdouble page_inc = gtk_adjustment_get_page_increment (adjustment); value = RINT (value / page_inc) * page_inc; } } digits = gtk_spin_button_get_digits (spin_button); while (digits--) power *= 10; /* round the value to the possible precision of the spinbutton, so * a focus-out will not change the value again, causing inadvertend * adjustment signals. */ value *= power; value = RINT (value); value /= power; if (private->constrain_drag) value = rint (value); gtk_adjustment_set_value (adjustment, value); } static gboolean pika_spin_scale_button_press (GtkWidget *widget, GdkEventButton *event) { PikaSpinScalePrivate *private = GET_PRIVATE (widget); gdouble x, y; private->changing_value = FALSE; private->relative_change = FALSE; private->pointer_warp = FALSE; pika_spin_scale_event_to_widget_coords (widget, event->window, event->x, event->y, &x, &y); pika_spin_scale_update_target (widget, event->window, x, y, (GdkEvent *) event); switch (private->target) { case TARGET_GRAB: case TARGET_GRABBING: private->changing_value = TRUE; gtk_widget_grab_focus (widget); pika_spin_scale_change_value (widget, x, event->state); pika_spin_scale_update_cursor (widget, event->window); return TRUE; case TARGET_RELATIVE: private->changing_value = TRUE; gtk_widget_grab_focus (widget); private->relative_change = TRUE; private->start_x = x; private->start_value = gtk_adjustment_get_value (gtk_spin_button_get_adjustment (GTK_SPIN_BUTTON (widget))); private->start_pointer_x = floor (event->x_root); private->start_pointer_y = floor (event->y_root); pika_spin_scale_update_cursor (widget, event->window); return TRUE; case TARGET_NUMBER: gtk_widget_grab_focus (widget); return TRUE; default: break; } return GTK_WIDGET_CLASS (parent_class)->button_press_event (widget, event); } static gboolean pika_spin_scale_button_release (GtkWidget *widget, GdkEventButton *event) { PikaSpinScalePrivate *private = GET_PRIVATE (widget); gdouble x, y; pika_spin_scale_event_to_widget_coords (widget, event->window, event->x, event->y, &x, &y); if (private->changing_value) { private->changing_value = FALSE; /* don't change the value if we're in the middle of a pointer warp, since * we didn't adjust start_x yet. see the comment in * pika_spin_scale_motion_notify(). */ if (! private->pointer_warp) pika_spin_scale_change_value (widget, x, event->state); if (private->relative_change) { gdk_device_warp (gdk_event_get_device ((GdkEvent *) event), gdk_event_get_screen ((GdkEvent *) event), private->start_pointer_x, private->start_pointer_y); } if (private->hover) { pika_spin_scale_update_target (widget, event->window, 0.0, 0.0, NULL); } else { pika_spin_scale_clear_target (widget, event->window); } gtk_widget_queue_draw (widget); return TRUE; } return GTK_WIDGET_CLASS (parent_class)->button_release_event (widget, event); } static gboolean pika_spin_scale_motion_notify (GtkWidget *widget, GdkEventMotion *event) { PikaSpinScalePrivate *private = GET_PRIVATE (widget); gdouble x, y; pika_spin_scale_event_to_widget_coords (widget, event->window, event->x, event->y, &x, &y); gdk_event_request_motions (event); private->hover = TRUE; if (private->changing_value) { GdkScreen *screen; GdkDisplay *display; gint pointer_x; gint pointer_y; GdkMonitor *monitor; GdkRectangle monitor_geometry; screen = gdk_event_get_screen ((GdkEvent *) event); display = gdk_screen_get_display (screen); pointer_x = floor (event->x_root); pointer_y = floor (event->y_root); monitor = gdk_display_get_monitor_at_point (display, pointer_x, pointer_y); gdk_monitor_get_geometry (monitor, &monitor_geometry); /* when applying a relative change, we wrap the pointer around the left * and right edges of the current monitor, so that the adjustment is not * limited by the monitor geometry. when the pointer reaches one of the * monitor edges, we move it one pixel away from the opposite edge, so * that it can be subsequently moved in the other direction, and adjust * start_x accordingly. * * unfortunately, we can't rely on gdk_device_warp() to actually * move the pointer (for example, it doesn't work on wayland), and * there's no easy way to tell whether the pointer moved or not. in * particular, even when the pointer doesn't move, gdk still simulates a * motion event, and reports the "new" pointer position until a real * motion event occurs. * * in order not to erroneously adjust start_x when * gdk_device_warp() fails, we remember that we *tried* to warp * the pointer, and defer the actual adjustment of start_x until * a future motion event, where the pointer's x coordinate is * different from the one passed to gdk_device_warp(). when * that happens, we "guess" whether the pointer got warped or * not by comparing its x coordinate to the one passed to * gdk_device_warp(): if their difference is less than half the * monitor width, then we assume the pointer got warped * (otherwise, the user must have very quickly moved the mouse * across half the screen.) yes, this is an ugly ugly hack :) */ if (private->pointer_warp) { if (pointer_x == private->pointer_warp_x) return TRUE; private->pointer_warp = FALSE; if (ABS (pointer_x - private->pointer_warp_x) < monitor_geometry.width / 2) private->start_x = private->pointer_warp_start_x; } pika_spin_scale_change_value (widget, x, event->state); if (private->relative_change) { GtkAdjustment *adjustment; gdouble value; gdouble lower; gdouble upper; adjustment = gtk_spin_button_get_adjustment (GTK_SPIN_BUTTON (widget)); value = gtk_adjustment_get_value (adjustment); lower = gtk_adjustment_get_lower (adjustment); upper = gtk_adjustment_get_upper (adjustment); if (gtk_widget_get_direction (widget) == GTK_TEXT_DIR_RTL) { gdouble temp; value = -value; temp = lower; lower = -upper; upper = -temp; } if (pointer_x <= monitor_geometry.x && value > lower) { private->pointer_warp = TRUE; private->pointer_warp_x = (monitor_geometry.width - 1) + pointer_x - 1; private->pointer_warp_start_x = private->start_x + (monitor_geometry.width - 2); } else if (pointer_x >= monitor_geometry.x + (monitor_geometry.width - 1) && value < upper) { private->pointer_warp = TRUE; private->pointer_warp_x = pointer_x - (monitor_geometry.width - 1) + 1; private->pointer_warp_start_x = private->start_x - (monitor_geometry.width - 2); } if (private->pointer_warp) { gdk_device_warp (gdk_event_get_device ((GdkEvent *) event), screen, private->pointer_warp_x, pointer_y); } } return TRUE; } GTK_WIDGET_CLASS (parent_class)->motion_notify_event (widget, event); if (! (event->state & (GDK_BUTTON1_MASK | GDK_BUTTON2_MASK | GDK_BUTTON3_MASK)) && private->hover) { pika_spin_scale_update_target (widget, event->window, x, y, (GdkEvent *) event); } return FALSE; } static gboolean pika_spin_scale_leave_notify (GtkWidget *widget, GdkEventCrossing *event) { PikaSpinScalePrivate *private = GET_PRIVATE (widget); private->hover = FALSE; if (! (event->state & (GDK_BUTTON1_MASK | GDK_BUTTON2_MASK | GDK_BUTTON3_MASK))) { pika_spin_scale_clear_target (widget, event->window); } return GTK_WIDGET_CLASS (parent_class)->leave_notify_event (widget, event); } static void pika_spin_scale_hierarchy_changed (GtkWidget *widget, GtkWidget *old_toplevel) { PikaSpinScalePrivate *private = GET_PRIVATE (widget); pika_spin_scale_setup_mnemonic (PIKA_SPIN_SCALE (widget), private->mnemonic_keyval); } static void pika_spin_scale_screen_changed (GtkWidget *widget, GdkScreen *old_screen) { PikaSpinScale *scale = PIKA_SPIN_SCALE (widget); PikaSpinScalePrivate *private = GET_PRIVATE (scale); GtkSettings *settings; g_clear_object (&private->layout); if (old_screen) { settings = gtk_settings_get_for_screen (old_screen); g_signal_handlers_disconnect_by_func (settings, pika_spin_scale_settings_notify, scale); } if (! gtk_widget_has_screen (widget)) return; settings = gtk_widget_get_settings (widget); g_signal_connect (settings, "notify::gtk-enable-mnemonics", G_CALLBACK (pika_spin_scale_settings_notify), scale); g_signal_connect (settings, "notify::gtk-enable-accels", G_CALLBACK (pika_spin_scale_settings_notify), scale); pika_spin_scale_settings_notify (settings, NULL, scale); } static void pika_spin_scale_value_changed (GtkSpinButton *spin_button) { PikaSpinScalePrivate *private = GET_PRIVATE (spin_button); GtkAdjustment *adjustment = gtk_spin_button_get_adjustment (spin_button); gdouble lower; gdouble upper; gdouble value; gdouble x0, x1; gdouble x; pika_spin_scale_get_limits (PIKA_SPIN_SCALE (spin_button), &lower, &upper); value = CLAMP (gtk_adjustment_get_value (adjustment), lower, upper); x0 = odd_pow (lower, 1.0 / private->gamma); x1 = odd_pow (upper, 1.0 / private->gamma); x = odd_pow (value, 1.0 / private->gamma); gtk_entry_set_progress_fraction (GTK_ENTRY (spin_button), (x - x0) / (x1 - x0)); } static void pika_spin_scale_settings_notify (GtkSettings *settings, const GParamSpec *pspec, PikaSpinScale *scale) { GtkWidget *toplevel = gtk_widget_get_toplevel (GTK_WIDGET (scale)); if (GTK_IS_WINDOW (toplevel)) pika_spin_scale_mnemonics_notify (GTK_WINDOW (toplevel), NULL, scale); } static void pika_spin_scale_mnemonics_notify (GtkWindow *window, const GParamSpec *pspec, PikaSpinScale *scale) { PikaSpinScalePrivate *private = GET_PRIVATE (scale); gboolean mnemonics_visible = FALSE; gboolean enable_mnemonics; gboolean auto_mnemonics; g_object_get (gtk_widget_get_settings (GTK_WIDGET (scale)), "gtk-enable-mnemonics", &enable_mnemonics, "gtk-auto-mnemonics", &auto_mnemonics, NULL); if (enable_mnemonics && (! auto_mnemonics || gtk_widget_is_sensitive (GTK_WIDGET (scale)))) { g_object_get (window, "mnemonics-visible", &mnemonics_visible, NULL); } if (private->mnemonics_visible != mnemonics_visible) { private->mnemonics_visible = mnemonics_visible; g_clear_object (&private->layout); gtk_widget_queue_draw (GTK_WIDGET (scale)); } } static void pika_spin_scale_setup_mnemonic (PikaSpinScale *scale, guint previous_keyval) { PikaSpinScalePrivate *private = GET_PRIVATE (scale); GtkWidget *widget = GTK_WIDGET (scale); GtkWidget *toplevel; if (private->mnemonic_window) { g_signal_handlers_disconnect_by_func (private->mnemonic_window, pika_spin_scale_mnemonics_notify, scale); gtk_window_remove_mnemonic (private->mnemonic_window, previous_keyval, widget); private->mnemonic_window = NULL; } toplevel = gtk_widget_get_toplevel (widget); if (gtk_widget_is_toplevel (toplevel) && private->mnemonic_keyval != GDK_KEY_VoidSymbol) { gtk_window_add_mnemonic (GTK_WINDOW (toplevel), private->mnemonic_keyval, widget); private->mnemonic_window = GTK_WINDOW (toplevel); g_signal_connect (toplevel, "notify::mnemonics-visible", G_CALLBACK (pika_spin_scale_mnemonics_notify), scale); } } static gdouble odd_pow (gdouble x, gdouble y) { if (x >= 0.0) return pow (x, y); else return -pow (-x, y); } /* public functions */ GtkWidget * pika_spin_scale_new (GtkAdjustment *adjustment, const gchar *label, gint digits) { g_return_val_if_fail (GTK_IS_ADJUSTMENT (adjustment), NULL); return g_object_new (PIKA_TYPE_SPIN_SCALE, "adjustment", adjustment, "label", label, "digits", digits, NULL); } static gboolean separate_uline_pattern (const gchar *str, guint *accel_key, gchar **new_str, gchar **pattern) { gboolean underscore; const gchar *src; gchar *dest; gchar *pattern_dest; *accel_key = GDK_KEY_VoidSymbol; *new_str = g_new (gchar, strlen (str) + 1); *pattern = g_new (gchar, g_utf8_strlen (str, -1) + 1); underscore = FALSE; src = str; dest = *new_str; pattern_dest = *pattern; while (*src) { gunichar c; const gchar *next_src; c = g_utf8_get_char (src); if (c == (gunichar)-1) { g_warning ("Invalid input string"); g_free (*new_str); g_free (*pattern); return FALSE; } next_src = g_utf8_next_char (src); if (underscore) { if (c == '_') *pattern_dest++ = ' '; else { *pattern_dest++ = '_'; if (*accel_key == GDK_KEY_VoidSymbol) *accel_key = gdk_keyval_to_lower (gdk_unicode_to_keyval (c)); } while (src < next_src) *dest++ = *src++; underscore = FALSE; } else { if (c == '_') { underscore = TRUE; src = next_src; } else { while (src < next_src) *dest++ = *src++; *pattern_dest++ = ' '; } } } *dest = 0; *pattern_dest = 0; return TRUE; } void pika_spin_scale_set_label (PikaSpinScale *scale, const gchar *label) { PikaSpinScalePrivate *private; guint accel_key = GDK_KEY_VoidSymbol; gchar *text = NULL; gchar *pattern = NULL; g_return_if_fail (PIKA_IS_SPIN_SCALE (scale)); private = GET_PRIVATE (scale); if (label == private->label) return; if (label && ! separate_uline_pattern (label, &accel_key, &text, &pattern)) return; g_free (private->label); private->label = g_strdup (label); g_free (private->label_text); private->label_text = text; /* don't dup */ g_free (private->label_pattern); private->label_pattern = pattern; /* don't dup */ if (private->mnemonic_keyval != accel_key) { guint previous = private->mnemonic_keyval; private->mnemonic_keyval = accel_key; pika_spin_scale_setup_mnemonic (scale, previous); } g_clear_object (&private->layout); gtk_widget_queue_resize (GTK_WIDGET (scale)); g_object_notify (G_OBJECT (scale), "label"); } const gchar * pika_spin_scale_get_label (PikaSpinScale *scale) { g_return_val_if_fail (PIKA_IS_SPIN_SCALE (scale), NULL); return GET_PRIVATE (scale)->label; } void pika_spin_scale_set_scale_limits (PikaSpinScale *scale, gdouble lower, gdouble upper) { PikaSpinScalePrivate *private; GtkSpinButton *spin_button; GtkAdjustment *adjustment; g_return_if_fail (PIKA_IS_SPIN_SCALE (scale)); private = GET_PRIVATE (scale); spin_button = GTK_SPIN_BUTTON (scale); adjustment = gtk_spin_button_get_adjustment (spin_button); g_return_if_fail (lower >= gtk_adjustment_get_lower (adjustment)); g_return_if_fail (upper <= gtk_adjustment_get_upper (adjustment)); private->scale_limits_set = TRUE; private->scale_lower = lower; private->scale_upper = upper; private->gamma = 1.0; pika_spin_scale_value_changed (spin_button); } void pika_spin_scale_unset_scale_limits (PikaSpinScale *scale) { PikaSpinScalePrivate *private; g_return_if_fail (PIKA_IS_SPIN_SCALE (scale)); private = GET_PRIVATE (scale); private->scale_limits_set = FALSE; private->scale_lower = 0.0; private->scale_upper = 0.0; pika_spin_scale_value_changed (GTK_SPIN_BUTTON (scale)); } gboolean pika_spin_scale_get_scale_limits (PikaSpinScale *scale, gdouble *lower, gdouble *upper) { PikaSpinScalePrivate *private; g_return_val_if_fail (PIKA_IS_SPIN_SCALE (scale), FALSE); private = GET_PRIVATE (scale); if (lower) *lower = private->scale_lower; if (upper) *upper = private->scale_upper; return private->scale_limits_set; } void pika_spin_scale_set_gamma (PikaSpinScale *scale, gdouble gamma) { PikaSpinScalePrivate *private; g_return_if_fail (PIKA_IS_SPIN_SCALE (scale)); private = GET_PRIVATE (scale); private->gamma = gamma; pika_spin_scale_value_changed (GTK_SPIN_BUTTON (scale)); } gdouble pika_spin_scale_get_gamma (PikaSpinScale *scale) { g_return_val_if_fail (PIKA_IS_SPIN_SCALE (scale), 1.0); return GET_PRIVATE (scale)->gamma; } /** * pika_spin_scale_set_constrain_drag: * @scale: the #PikaSpinScale. * @constrain: whether constraining to integer values when dragging with * pointer. * * If @constrain_drag is TRUE, dragging the scale with the pointer will * only result into integer values. It will still possible to set the * scale to fractional values (if the spin scale "digits" is above 0) * for instance with keyboard edit. */ void pika_spin_scale_set_constrain_drag (PikaSpinScale *scale, gboolean constrain) { PikaSpinScalePrivate *private; g_return_if_fail (PIKA_IS_SPIN_SCALE (scale)); private = GET_PRIVATE (scale); private->constrain_drag = constrain; } gboolean pika_spin_scale_get_constrain_drag (PikaSpinScale *scale) { g_return_val_if_fail (PIKA_IS_SPIN_SCALE (scale), 1.0); return GET_PRIVATE (scale)->constrain_drag; } /** * pika_spin_scale_get_mnemonic_keyval: * @scale: the #PikaSpinScale. * * If @scale has been set with a mnemonic key in its label text, this function * returns the keyval used for the mnemonic accelerator. * * Returns: the keyval usable for accelerators, or [const@Gdk.KEY_VoidSymbol]. */ const guint pika_spin_scale_get_mnemonic_keyval (PikaSpinScale *scale) { g_return_val_if_fail (PIKA_IS_SPIN_SCALE (scale), GDK_KEY_VoidSymbol); return GET_PRIVATE (scale)->mnemonic_keyval; }