qulogic/libgnt

closing merged branch
refresh-fixes
2019-04-11, Gary Kramlich
80028f1c0dd2
closing merged branch
/*
* 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"
enum
{
SIG_VALUE_CHANGED,
SIGS,
};
static guint signals[SIGS] = { 0 };
G_DEFINE_TYPE(GntSlider, gnt_slider, GNT_TYPE_WIDGET)
/* returns TRUE if the value was changed */
static gboolean
sanitize_value(GntSlider *slider)
{
if (slider->current < slider->min)
slider->current = slider->min;
else if (slider->current > slider->max)
slider->current = slider->max;
else
return FALSE;
return TRUE;
}
static void
redraw_slider(GntSlider *slider)
{
GntWidget *widget = GNT_WIDGET(slider);
if (GNT_WIDGET_IS_FLAG_SET(widget, GNT_WIDGET_MAPPED))
gnt_widget_draw(widget);
}
static void
slider_value_changed(GntSlider *slider)
{
g_signal_emit(slider, signals[SIG_VALUE_CHANGED], 0, slider->current);
}
static void
gnt_slider_draw(GntWidget *widget)
{
GntSlider *slider = GNT_SLIDER(widget);
int attr = 0;
int position, size = 0;
if (slider->vertical)
size = widget->priv.height;
else
size = widget->priv.width;
if (gnt_widget_has_focus(widget))
attr |= GNT_COLOR_HIGHLIGHT;
else
attr |= GNT_COLOR_HIGHLIGHT_D;
if (slider->max != slider->min)
position = ((size - 1) * (slider->current - slider->min)) / (slider->max - slider->min);
else
position = 0;
if (slider->vertical) {
mvwvline(widget->window, size-position, 0, ACS_VLINE | gnt_color_pair(GNT_COLOR_NORMAL) | A_BOLD,
position);
mvwvline(widget->window, 0, 0, ACS_VLINE | gnt_color_pair(GNT_COLOR_NORMAL),
size-position);
} else {
mvwhline(widget->window, 0, 0, ACS_HLINE | gnt_color_pair(GNT_COLOR_NORMAL) | A_BOLD,
position);
mvwhline(widget->window, 0, position, ACS_HLINE | gnt_color_pair(GNT_COLOR_NORMAL),
size - position);
}
mvwaddch(widget->window,
slider->vertical ? (size - position - 1) : 0,
slider->vertical ? 0 : position,
ACS_CKBOARD | gnt_color_pair(attr));
}
static void
gnt_slider_size_request(GntWidget *widget)
{
if (GNT_SLIDER(widget)->vertical) {
widget->priv.width = 1;
widget->priv.height = 5;
} else {
widget->priv.width = 5;
widget->priv.height = 1;
}
}
static void
gnt_slider_map(GntWidget *widget)
{
if (widget->priv.width == 0 || widget->priv.height == 0)
gnt_widget_size_request(widget);
GNTDEBUG;
}
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);
gnt_slider_set_value(slider, slider->current - slider->smallstep);
return TRUE;
}
static gboolean
large_step_back(GntBindable *bindable, G_GNUC_UNUSED GList *params)
{
GntSlider *slider = GNT_SLIDER(bindable);
gnt_slider_set_value(slider, slider->current - slider->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);
gnt_slider_set_value(slider, slider->current + slider->smallstep);
return TRUE;
}
static gboolean
large_step_forward(GntBindable *bindable, G_GNUC_UNUSED GList *params)
{
GntSlider *slider = GNT_SLIDER(bindable);
gnt_slider_set_value(slider, slider->current + slider->largestep);
return TRUE;
}
static gboolean
move_min_value(GntBindable *bindable, G_GNUC_UNUSED GList *params)
{
GntSlider *slider = GNT_SLIDER(bindable);
gnt_slider_set_value(slider, slider->min);
return TRUE;
}
static gboolean
move_max_value(GntBindable *bindable, G_GNUC_UNUSED GList *params)
{
GntSlider *slider = GNT_SLIDER(bindable);
gnt_slider_set_value(slider, slider->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);
widget->priv.minw = 1;
widget->priv.minh = 1;
GNTDEBUG;
}
/******************************************************************************
* 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);
slider->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);
slider->step = 1;
return widget;
}
void gnt_slider_set_value(GntSlider *slider, int value)
{
int old;
if (slider->current == value)
return;
old = slider->current;
slider->current = value;
sanitize_value(slider);
if (old == slider->current)
return;
redraw_slider(slider);
slider_value_changed(slider);
}
int gnt_slider_get_value(GntSlider *slider)
{
return slider->current;
}
int gnt_slider_advance_step(GntSlider *slider, int steps)
{
gnt_slider_set_value(slider, slider->current + steps * slider->step);
return slider->current;
}
void gnt_slider_set_step(GntSlider *slider, int step)
{
slider->step = step;
}
void gnt_slider_set_small_step(GntSlider *slider, int step)
{
slider->smallstep = step;
}
void gnt_slider_set_large_step(GntSlider *slider, int step)
{
slider->largestep = step;
}
void gnt_slider_set_range(GntSlider *slider, int max, int min)
{
slider->max = MAX(max, min);
slider->min = MIN(max, min);
sanitize_value(slider);
}
static void
update_label(GntSlider *slider, int current_value, GntLabel *label)
{
char value[256];
g_snprintf(value, sizeof(value), "%d/%d", current_value, slider->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);
}