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#include "ink-spinscale.h"
#include <gdkmm/general.h>
#include <gdkmm/cursor.h>
#include <gdkmm/event.h>
#include <gtkmm/spinbutton.h>
#include <gdk/gdk.h>
#include <iostream>
// Constructor for Gtk::Range is protected... must derive a new class.
InkRange::InkRange(Glib::RefPtr<Gtk::Adjustment> adjustment, Gtk::SpinButton* spinbutton)
: Glib::ObjectBase("InkRange")
, Gtk::Range()
, _spinbutton(spinbutton)
, _dragging(false)
, _drag_start(0)
, _drag_offset(0)
{
set_name("InkRange");
set_adjustment(adjustment);
// std::cout << "GType name: " << G_OBJECT_TYPE_NAME(gobj()) << std::endl;
}
void
InkRange::set_label(Glib::ustring label) {
_label = label;
}
bool
InkRange::on_draw(const::Cairo::RefPtr<::Cairo::Context>& cr) {
// std::cout << "\nInkRange::on_draw" << std::endl;
// Get our own style info...
// auto style = get_style_context();
// auto state = style->get_state();
// std::cout << "color: " << style->get_color( state ).to_string() << std::endl;
// std::cout << "background: " << style->get_background_color( state ).to_string() << std::endl;
// std::cout << "border: " << style->get_border_color( state ).to_string() << std::endl;
// Get SpinButton style info...
auto style_spin = _spinbutton->get_style_context();
auto state_spin = style_spin->get_state();
Gdk::RGBA text_color = style_spin->get_color( state_spin );
// Create Pango layout.
auto layout_label = create_pango_layout(_label);
layout_label->set_ellipsize( Pango::ELLIPSIZE_END );
layout_label->set_width(PANGO_SCALE * get_width());
// Get y location of SpinButton text (to match vertical position of SpinButton text).
int x, y;
_spinbutton->get_layout_offsets(x, y);
// Render text in normal text color.
cr->save();
Gdk::Cairo::set_source_rgba(cr, text_color);
cr->set_source_rgba(0, 0, 0, 1);
cr->move_to(5, y );
layout_label->show_in_cairo_context(cr);
cr->restore();
// Fill widget proportional to value.
double fraction = get_fraction();
// Render bar (over normal text to reduce blurriness).
Gdk::RGBA fill_color("rgba(74,144,217,1.0)");
Gdk::Cairo::set_source_rgba(cr, fill_color);
cr->rectangle(0, 0, get_width() * fraction, get_height());
cr->fill_preserve(); // Save rectangle for clipping text.
// Render text, clipped, in white over bar (TODO: use same color as SpinButton progress bar).
cr->save();
cr->clip();
cr->set_source_rgba(1, 1, 1, 1);
cr->move_to(5, y);
layout_label->show_in_cairo_context(cr);
cr->restore();
return false;
}
bool
InkRange::on_button_press_event(GdkEventButton* button_event) {
_dragging = true;
if (! (button_event->state & GDK_MOD1_MASK) ) {
set_adjustment_value(button_event->x);
}
// Dragging must be initialized after any adjustment due to button press.
_dragging = true;
_drag_start = button_event->x;
_drag_offset = get_width() * get_fraction();
return true;
}
bool
InkRange::on_button_release_event(GdkEventButton* button_event) {
_dragging = false;
return true;
}
bool
InkRange::on_motion_notify_event(GdkEventMotion* motion_event) {
double x = motion_event->x;
double y = motion_event->y;
if (_dragging) {
if (! (motion_event->state & GDK_MOD1_MASK) ) {
// Absolute change
set_adjustment_value(x);
} else {
// Relative change
double xx = (_drag_offset + (x - _drag_start) * 0.1);
set_adjustment_value(xx);
}
return true;
}
if (! (motion_event->state & (GDK_BUTTON1_MASK | GDK_BUTTON2_MASK | GDK_BUTTON3_MASK))) {
auto display = get_display();
auto cursor = Gdk::Cursor::create(display, Gdk::SB_DOWN_ARROW);
// Get Gdk::window (not Gtk::window).. set cursor for entire window.
// Would need to unset with leave event.
// get_window()->set_cursor( cursor );
// Can't see how to do this the C++ way since GdkEventMotion
// is a structure with a C window member. There is a gdkmm
// wrapping function for Gdk::EventMotion but only in unstable.
gdk_window_set_cursor( motion_event->window, cursor->gobj() );
}
return false;
}
double
InkRange::get_fraction() {
Glib::RefPtr<Gtk::Adjustment> adjustment = get_adjustment();
double upper = adjustment->get_upper();
double lower = adjustment->get_lower();
double value = adjustment->get_value();
double fraction = (value - lower)/(upper - lower);
return fraction;
}
void
InkRange::set_adjustment_value(double x) {
Glib::RefPtr<Gtk::Adjustment> adjustment = get_adjustment();
double upper = adjustment->get_upper();
double lower = adjustment->get_lower();
double fraction = x / (double)get_width();
double value = fraction * (upper - lower) + lower;
adjustment->set_value( value );
}
/*******************************************************************/
InkSpinScale::InkSpinScale(double value, double lower,
double upper, double step_increment,
double page_increment, double page_size)
{
set_name("InkSpinScale");
g_assert (upper - lower > 0);
_adjustment = Gtk::Adjustment::create(value,
lower,
upper,
step_increment,
page_increment,
page_size);
_spinbutton = Gtk::manage(new Gtk::SpinButton(_adjustment));
_spinbutton->set_numeric();
_spinbutton->signal_key_release_event().connect(sigc::mem_fun(*this,&InkSpinScale::on_key_release_event),false);
_range = Gtk::manage(new InkRange(_adjustment, _spinbutton));
pack_end( *_spinbutton, Gtk::PACK_SHRINK );
pack_end( *_range, Gtk::PACK_EXPAND_WIDGET );
}
InkSpinScale::InkSpinScale(Glib::RefPtr<Gtk::Adjustment> adjustment)
: _adjustment(adjustment)
{
set_name("InkSpinScale");
g_assert (_adjustment->get_upper() - _adjustment->get_lower() > 0);
_spinbutton = Gtk::manage(new Gtk::SpinButton(_adjustment));
_spinbutton->set_numeric();
_range = Gtk::manage(new InkRange(_adjustment, _spinbutton));
pack_end( *_spinbutton, Gtk::PACK_SHRINK );
pack_end( *_range, Gtk::PACK_EXPAND_WIDGET );
}
void
InkSpinScale::set_label(Glib::ustring label) {
_range->set_label(label);
}
void
InkSpinScale::set_digits(int digits) {
_spinbutton->set_digits(digits);
}
int
InkSpinScale::get_digits() const {
return _spinbutton->get_digits();
}
void
InkSpinScale::set_focus_widget(GtkWidget * focus_widget) {
_focus_widget = focus_widget;
}
// Return focus to canvas.
bool
InkSpinScale::on_key_release_event(GdkEventKey* key_event) {
switch (key_event->keyval) {
case GDK_KEY_Escape:
case GDK_KEY_Return:
case GDK_KEY_KP_Enter:
{
if (_focus_widget) {
gtk_widget_grab_focus( _focus_widget );
}
}
break;
}
return false;
}
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