2 Copyright (C) 2005 Paul Davis
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 2 of the License, or
7 (at your option) any later version.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software
16 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
26 #include "gtkmm2ext/pixscroller.h"
27 #include "gtkmm2ext/keyboard.h"
31 using namespace Gtkmm2ext;
33 PixScroller::PixScroller (Adjustment& a,
34 Glib::RefPtr<Gdk::Pixbuf> s,
35 Glib::RefPtr<Gdk::Pixbuf> r)
43 add_events (Gdk::BUTTON_PRESS_MASK|Gdk::BUTTON_RELEASE_MASK|Gdk::POINTER_MOTION_MASK|Gdk::SCROLL_MASK);
45 adj.signal_value_changed().connect (mem_fun (*this, &PixScroller::adjustment_changed));
46 default_value = adj.get_value();
48 sliderrect.set_width(slider->get_width());
49 sliderrect.set_height(slider->get_height());
50 railrect.set_width(rail->get_width());
51 railrect.set_height(rail->get_height());
53 railrect.set_y(sliderrect.get_height() / 2);
56 overall_height = railrect.get_height() + sliderrect.get_height();
58 sliderrect.set_y((int) rint ((overall_height - sliderrect.get_height()) * (adj.get_upper() - adj.get_value())));
59 railrect.set_x((sliderrect.get_width() / 2) - 2);
61 if (rail->get_has_alpha()) {
62 format = Cairo::FORMAT_ARGB32;
64 format = Cairo::FORMAT_RGB24;
66 rail_surface = Cairo::ImageSurface::create (format, rail->get_width(), rail->get_height());
67 rail_context = Cairo::Context::create (rail_surface);
68 Gdk::Cairo::set_source_pixbuf (rail_context, rail, 0.0, 0.0);
69 rail_context->paint();
71 if (slider->get_has_alpha()) {
72 format = Cairo::FORMAT_ARGB32;
74 format = Cairo::FORMAT_RGB24;
76 slider_surface = Cairo::ImageSurface::create (format, slider->get_width(), slider->get_height());
77 slider_context = Cairo::Context::create (slider_surface);
78 Gdk::Cairo::set_source_pixbuf (slider_context, slider, 0.0, 0.0);
79 slider_context->paint();
83 PixScroller::on_size_request (GtkRequisition* requisition)
85 requisition->width = sliderrect.get_width();
86 requisition->height = overall_height;
90 PixScroller::on_expose_event (GdkEventExpose* ev)
92 GdkRectangle intersect;
93 Glib::RefPtr<Gdk::Window> win (get_window());
94 Cairo::RefPtr<Cairo::Context> context = get_window()->create_cairo_context();
96 if (gdk_rectangle_intersect (railrect.gobj(), &ev->area, &intersect)) {
99 context->rectangle (intersect.x, intersect.y, intersect.width, intersect.height);
101 context->set_source (rail_surface, intersect.x - railrect.get_x(), intersect.y - railrect.get_y());
102 context->rectangle (intersect.x, intersect.y, intersect.width, intersect.height);
108 if (gdk_rectangle_intersect (sliderrect.gobj(), &ev->area, &intersect)) {
111 context->rectangle (intersect.x, intersect.y, intersect.width, intersect.height);
113 context->set_source (rail_surface, intersect.x - sliderrect.get_x(), intersect.y - sliderrect.get_y());
114 context->rectangle (intersect.x, intersect.y, intersect.width, intersect.height);
124 PixScroller::on_button_press_event (GdkEventButton* ev)
126 switch (ev->button) {
128 if (!(ev->state & Keyboard::TertiaryModifier)) {
132 grab_window = ev->window;
145 PixScroller::on_button_release_event (GdkEventButton* ev)
149 if (ev->state & Keyboard::PrimaryModifier) {
150 if (ev->state & Keyboard::SecondaryModifier) {
159 switch (ev->button) {
165 if (ev->y == grab_start) {
166 /* no motion - just a click */
169 if (ev->y < sliderrect.get_height()/2) {
173 fract = 1.0 - (ev->y - sliderrect.get_height()/2) / railrect.get_height();
176 fract = min (1.0, fract);
177 fract = max (0.0, fract);
179 adj.set_value (scale * fract * (adj.get_upper() - adj.get_lower()));
182 if (ev->state & Keyboard::TertiaryModifier) {
183 adj.set_value (default_value);
184 cerr << "default value = " << default_value << endl;
195 PixScroller::on_scroll_event (GdkEventScroll* ev)
199 if (ev->state & Keyboard::PrimaryModifier) {
200 if (ev->state & Keyboard::SecondaryModifier) {
209 switch (ev->direction) {
213 adj.set_value (adj.get_value() + (adj.get_page_increment() * scale));
215 case GDK_SCROLL_DOWN:
217 adj.set_value (adj.get_value() - (adj.get_page_increment() * scale));
226 PixScroller::on_motion_notify_event (GdkEventMotion* ev)
233 if (ev->window != grab_window) {
235 grab_window = ev->window;
239 if (ev->state & Keyboard::PrimaryModifier) {
240 if (ev->state & Keyboard::SecondaryModifier) {
249 delta = ev->y - grab_y;
252 fract = (delta / railrect.get_height());
254 fract = min (1.0, fract);
255 fract = max (-1.0, fract);
259 adj.set_value (adj.get_value() + scale * fract * (adj.get_upper() - adj.get_lower()));
266 PixScroller::adjustment_changed ()
268 int y = (int) rint ((overall_height - sliderrect.get_height()) * (adj.get_upper() - adj.get_value()));
270 if (y != sliderrect.get_y()) {