Mercurial > grim > libgnt
view gntslider.c @ 1320:93fc8c41ded2
Fix incorrect Since tags.
Anything on default-only would never have gone out in 2.8.0; update them to
3.0.0.
author | Elliott Sales de Andrade <quantum.analyst@gmail.com> |
---|---|
date | Sun, 19 May 2019 02:50:51 -0400 |
parents | a0be04705005 |
children | d390bf1e62e7 |
line wrap: on
line source
/* * GNT - The GLib Ncurses Toolkit * * GNT is the legal property of its developers, whose names are too numerous * to list here. Please refer to the COPYRIGHT file distributed with this * source distribution. * * This library 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 2 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, write to the Free Software Foundation, Inc., * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ #include "gntinternal.h" #include "gntcolors.h" #include "gntkeys.h" #include "gntslider.h" #include "gntstyle.h" #include "gntwidgetprivate.h" typedef struct { gboolean vertical; int max; /* maximum value */ int min; /* minimum value */ int step; /* amount to change at each step */ int current; /* current value */ int smallstep; int largestep; } GntSliderPrivate; enum { SIG_VALUE_CHANGED, SIGS, }; static guint signals[SIGS] = { 0 }; G_DEFINE_TYPE_WITH_PRIVATE(GntSlider, gnt_slider, GNT_TYPE_WIDGET) /* returns TRUE if the value was changed */ static gboolean sanitize_value(GntSliderPrivate *priv) { if (priv->current < priv->min) priv->current = priv->min; else if (priv->current > priv->max) priv->current = priv->max; else return FALSE; return TRUE; } static void redraw_slider(GntSlider *slider) { GntWidget *widget = GNT_WIDGET(slider); if (gnt_widget_get_mapped(widget)) gnt_widget_draw(widget); } static void slider_value_changed(GntSlider *slider) { GntSliderPrivate *priv = gnt_slider_get_instance_private(slider); g_signal_emit(slider, signals[SIG_VALUE_CHANGED], 0, priv->current); } static void gnt_slider_draw(GntWidget *widget) { GntSlider *slider = GNT_SLIDER(widget); GntSliderPrivate *priv = gnt_slider_get_instance_private(slider); WINDOW *window = gnt_widget_get_window(widget); int attr = 0; int position, size = 0; if (priv->vertical) gnt_widget_get_internal_size(widget, NULL, &size); else gnt_widget_get_internal_size(widget, &size, NULL); if (gnt_widget_has_focus(widget)) attr |= GNT_COLOR_HIGHLIGHT; else attr |= GNT_COLOR_HIGHLIGHT_D; if (priv->max != priv->min) position = ((size - 1) * (priv->current - priv->min)) / (priv->max - priv->min); else position = 0; if (priv->vertical) { mvwvline(window, size - position, 0, ACS_VLINE | gnt_color_pair(GNT_COLOR_NORMAL) | A_BOLD, position); mvwvline(window, 0, 0, ACS_VLINE | gnt_color_pair(GNT_COLOR_NORMAL), size - position); } else { mvwhline(window, 0, 0, ACS_HLINE | gnt_color_pair(GNT_COLOR_NORMAL) | A_BOLD, position); mvwhline(window, 0, position, ACS_HLINE | gnt_color_pair(GNT_COLOR_NORMAL), size - position); } mvwaddch(window, priv->vertical ? (size - position - 1) : 0, priv->vertical ? 0 : position, ACS_CKBOARD | gnt_color_pair(attr)); } static void gnt_slider_size_request(GntWidget *widget) { GntSliderPrivate *priv = gnt_slider_get_instance_private(GNT_SLIDER(widget)); if (priv->vertical) { gnt_widget_set_internal_size(widget, 1, 5); } else { gnt_widget_set_internal_size(widget, 5, 1); } } static void gnt_slider_map(GntWidget *widget) { gint width, height; gnt_widget_get_internal_size(widget, &width, &height); if (width == 0 || height == 0) { gnt_widget_size_request(widget); } } static gboolean step_back(GntBindable *bindable, G_GNUC_UNUSED GList *params) { GntSlider *slider = GNT_SLIDER(bindable); gnt_slider_advance_step(slider, -1); return TRUE; } static gboolean small_step_back(GntBindable *bindable, G_GNUC_UNUSED GList *params) { GntSlider *slider = GNT_SLIDER(bindable); GntSliderPrivate *priv = gnt_slider_get_instance_private(slider); gnt_slider_set_value(slider, priv->current - priv->smallstep); return TRUE; } static gboolean large_step_back(GntBindable *bindable, G_GNUC_UNUSED GList *params) { GntSlider *slider = GNT_SLIDER(bindable); GntSliderPrivate *priv = gnt_slider_get_instance_private(slider); gnt_slider_set_value(slider, priv->current - priv->largestep); return TRUE; } static gboolean step_forward(GntBindable *bindable, G_GNUC_UNUSED GList *params) { GntSlider *slider = GNT_SLIDER(bindable); gnt_slider_advance_step(slider, 1); return TRUE; } static gboolean small_step_forward(GntBindable *bindable, G_GNUC_UNUSED GList *params) { GntSlider *slider = GNT_SLIDER(bindable); GntSliderPrivate *priv = gnt_slider_get_instance_private(slider); gnt_slider_set_value(slider, priv->current + priv->smallstep); return TRUE; } static gboolean large_step_forward(GntBindable *bindable, G_GNUC_UNUSED GList *params) { GntSlider *slider = GNT_SLIDER(bindable); GntSliderPrivate *priv = gnt_slider_get_instance_private(slider); gnt_slider_set_value(slider, priv->current + priv->largestep); return TRUE; } static gboolean move_min_value(GntBindable *bindable, G_GNUC_UNUSED GList *params) { GntSlider *slider = GNT_SLIDER(bindable); GntSliderPrivate *priv = gnt_slider_get_instance_private(slider); gnt_slider_set_value(slider, priv->min); return TRUE; } static gboolean move_max_value(GntBindable *bindable, G_GNUC_UNUSED GList *params) { GntSlider *slider = GNT_SLIDER(bindable); GntSliderPrivate *priv = gnt_slider_get_instance_private(slider); gnt_slider_set_value(slider, priv->max); return TRUE; } static void gnt_slider_class_init(GntSliderClass *klass) { GntBindableClass *bindable = GNT_BINDABLE_CLASS(klass); GntWidgetClass *widget_class = GNT_WIDGET_CLASS(klass); widget_class->draw = gnt_slider_draw; widget_class->map = gnt_slider_map; widget_class->size_request = gnt_slider_size_request; klass->changed = NULL; signals[SIG_VALUE_CHANGED] = g_signal_new("changed", G_TYPE_FROM_CLASS(klass), G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET(GntSliderClass, changed), NULL, NULL, NULL, G_TYPE_NONE, 1, G_TYPE_INT); gnt_bindable_class_register_action(bindable, "step-backward", step_back, GNT_KEY_LEFT, NULL); gnt_bindable_register_binding(bindable, "step-backward", GNT_KEY_DOWN, NULL); gnt_bindable_class_register_action(bindable, "step-forward", step_forward, GNT_KEY_RIGHT, NULL); gnt_bindable_register_binding(bindable, "step-forward", GNT_KEY_UP, NULL); gnt_bindable_class_register_action(bindable, "small-step-backward", small_step_back, GNT_KEY_CTRL_LEFT, NULL); gnt_bindable_register_binding(bindable, "small-step-backward", GNT_KEY_CTRL_DOWN, NULL); gnt_bindable_class_register_action(bindable, "small-step-forward", small_step_forward, GNT_KEY_CTRL_RIGHT, NULL); gnt_bindable_register_binding(bindable, "small-step-forward", GNT_KEY_CTRL_UP, NULL); gnt_bindable_class_register_action(bindable, "large-step-backward", large_step_back, GNT_KEY_PGDOWN, NULL); gnt_bindable_class_register_action(bindable, "large-step-forward", large_step_forward, GNT_KEY_PGUP, NULL); gnt_bindable_class_register_action(bindable, "min-value", move_min_value, GNT_KEY_HOME, NULL); gnt_bindable_class_register_action(bindable, "max-value", move_max_value, GNT_KEY_END, NULL); gnt_style_read_actions(G_OBJECT_CLASS_TYPE(klass), GNT_BINDABLE_CLASS(klass)); } static void gnt_slider_init(GntSlider *slider) { GntWidget *widget = GNT_WIDGET(slider); gnt_widget_set_has_shadow(widget, FALSE); gnt_widget_set_has_border(widget, FALSE); gnt_widget_set_take_focus(widget, TRUE); gnt_widget_set_minimum_size(widget, 1, 1); } /****************************************************************************** * GntSlider API *****************************************************************************/ GntWidget *gnt_slider_new(gboolean vertical, int max, int min) { GntWidget *widget = g_object_new(GNT_TYPE_SLIDER, NULL); GntSlider *slider = GNT_SLIDER(widget); GntSliderPrivate *priv = gnt_slider_get_instance_private(slider); priv->vertical = vertical; if (vertical) { gnt_widget_set_grow_y(widget, TRUE); } else { gnt_widget_set_grow_x(widget, TRUE); } gnt_slider_set_range(slider, max, min); priv->step = 1; return widget; } gboolean gnt_slider_get_vertical(GntSlider *slider) { GntSliderPrivate *priv = gnt_slider_get_instance_private(slider); g_return_val_if_fail(GNT_IS_SLIDER(slider), FALSE); return priv->vertical; } void gnt_slider_set_value(GntSlider *slider, int value) { GntSliderPrivate *priv = gnt_slider_get_instance_private(slider); int old; if (priv->current == value) return; old = priv->current; priv->current = value; sanitize_value(priv); if (old == priv->current) return; redraw_slider(slider); slider_value_changed(slider); } int gnt_slider_get_value(GntSlider *slider) { GntSliderPrivate *priv = gnt_slider_get_instance_private(slider); return priv->current; } int gnt_slider_advance_step(GntSlider *slider, int steps) { GntSliderPrivate *priv = gnt_slider_get_instance_private(slider); gnt_slider_set_value(slider, priv->current + steps * priv->step); return priv->current; } void gnt_slider_set_step(GntSlider *slider, int step) { GntSliderPrivate *priv = gnt_slider_get_instance_private(slider); priv->step = step; } int gnt_slider_get_step(GntSlider *slider) { GntSliderPrivate *priv = gnt_slider_get_instance_private(slider); g_return_val_if_fail(GNT_IS_SLIDER(slider), 0); return priv->step; } void gnt_slider_set_small_step(GntSlider *slider, int step) { GntSliderPrivate *priv = gnt_slider_get_instance_private(slider); priv->smallstep = step; } int gnt_slider_get_small_step(GntSlider *slider) { GntSliderPrivate *priv = gnt_slider_get_instance_private(slider); g_return_val_if_fail(GNT_IS_SLIDER(slider), 0); return priv->smallstep; } void gnt_slider_set_large_step(GntSlider *slider, int step) { GntSliderPrivate *priv = gnt_slider_get_instance_private(slider); priv->largestep = step; } int gnt_slider_get_large_step(GntSlider *slider) { GntSliderPrivate *priv = gnt_slider_get_instance_private(slider); g_return_val_if_fail(GNT_IS_SLIDER(slider), 0); return priv->largestep; } void gnt_slider_set_range(GntSlider *slider, int max, int min) { GntSliderPrivate *priv = gnt_slider_get_instance_private(slider); priv->max = MAX(max, min); priv->min = MIN(max, min); sanitize_value(priv); } void gnt_slider_get_range(GntSlider *slider, int *max, int *min) { GntSliderPrivate *priv = gnt_slider_get_instance_private(slider); g_return_if_fail(GNT_IS_SLIDER(slider)); *max = priv->max; *min = priv->min; } static void update_label(GntSlider *slider, int current_value, GntLabel *label) { GntSliderPrivate *priv = gnt_slider_get_instance_private(slider); char value[256]; g_snprintf(value, sizeof(value), "%d/%d", current_value, priv->max); gnt_label_set_text(label, value); } void gnt_slider_reflect_label(GntSlider *slider, GntLabel *label) { g_signal_connect(G_OBJECT(slider), "changed", G_CALLBACK(update_label), label); }