249 lines
5.6 KiB
C++
249 lines
5.6 KiB
C++
/*
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Copyright (C) 2005 Paul Davis
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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$Id$
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*/
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#include <iostream>
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#include <algorithm>
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#include <cmath>
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#include <gtkmm.h>
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#include <gtkmm2ext/pixscroller.h>
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using namespace std;
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using namespace Gtk;
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using namespace Gtkmm2ext;
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PixScroller::PixScroller (Adjustment& a, Pix& pix)
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: adj (a)
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{
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dragging = false;
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add_events (Gdk::BUTTON_PRESS_MASK|Gdk::BUTTON_RELEASE_MASK|Gdk::POINTER_MOTION_MASK);
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adj.signal_value_changed().connect (mem_fun (*this, &PixScroller::adjustment_changed));
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default_value = adj.get_value();
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pix.generate ();
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rail = *(pix.pixmap (0));
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rail_mask = *(pix.shape_mask (0));
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slider = *(pix.pixmap (1));
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slider_mask = *(pix.shape_mask (1));
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int w, h;
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slider->get_size (w, h);
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sliderrect.set_width(w);
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sliderrect.set_height(h);
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rail->get_size (w, h);
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railrect.set_width(w);
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railrect.set_height(h);
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railrect.set_y(sliderrect.get_height() / 2);
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sliderrect.set_x(0);
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overall_height = railrect.get_height() + sliderrect.get_height();
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sliderrect.set_y((int) rint ((overall_height - sliderrect.get_height()) * (adj.get_upper() - adj.get_value())));
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railrect.set_x((sliderrect.get_width() / 2) - 2);
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}
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void
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PixScroller::on_size_request (GtkRequisition* requisition)
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{
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requisition->width = sliderrect.get_width();
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requisition->height = overall_height;
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}
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bool
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PixScroller::on_expose_event (GdkEventExpose* ev)
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{
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GdkRectangle intersect;
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Glib::RefPtr<Gdk::Window> win (get_window());
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win->draw_rectangle (get_style()->get_bg_gc(get_state()), TRUE,
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ev->area.x,
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ev->area.y,
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ev->area.width,
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ev->area.height);
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if (gdk_rectangle_intersect (railrect.gobj(), &ev->area, &intersect)) {
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Glib::RefPtr<Gdk::GC> gc(get_style()->get_bg_gc(get_state()));
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win->draw_drawable (gc, rail,
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intersect.x - railrect.get_x(),
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intersect.y - railrect.get_y(),
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intersect.x,
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intersect.y,
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intersect.width,
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intersect.height);
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}
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if (gdk_rectangle_intersect (sliderrect.gobj(), &ev->area, &intersect)) {
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Glib::RefPtr<Gdk::GC> gc(get_style()->get_fg_gc(get_state()));
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Glib::RefPtr<Gdk::Bitmap> mask (slider_mask);
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// Do these have a gtk2 equivalent?
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// Gdk::GCValues values;
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// gc->get_values(values);
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gc->set_clip_origin (sliderrect.get_x(), sliderrect.get_y());
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gc->set_clip_mask (mask);
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win->draw_drawable (gc, slider,
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intersect.x - sliderrect.get_x(),
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intersect.y - sliderrect.get_y(),
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intersect.x,
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intersect.y,
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intersect.width,
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intersect.height);
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// gc->set_clip_origin(values.clip_x_origin, values.clip_y_origin);
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// Gdk::Bitmap i_hate_gdk (values.clip_mask);
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// gc->set_clip_mask (i_hate_gdk);
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}
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return true;
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}
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bool
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PixScroller::on_button_press_event (GdkEventButton* ev)
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{
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switch (ev->button) {
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case 1:
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if (!(ev->state & Gdk::SHIFT_MASK)) {
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add_modal_grab();
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grab_y = ev->y;
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grab_start = ev->y;
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grab_window = ev->window;
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dragging = true;
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}
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break;
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default:
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break;
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}
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return false;
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}
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bool
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PixScroller::on_button_release_event (GdkEventButton* ev)
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{
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double scale;
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if (ev->state & GDK_CONTROL_MASK) {
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if (ev->state & GDK_MOD1_MASK) {
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scale = 0.05;
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} else {
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scale = 0.1;
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}
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} else {
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scale = 1.0;
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}
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switch (ev->button) {
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case 1:
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if (dragging) {
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remove_modal_grab();
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dragging = false;
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if (ev->y == grab_start) {
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/* no motion - just a click */
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double fract;
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if (ev->y < sliderrect.get_height()/2) {
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/* near the top */
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fract = 1.0;
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} else {
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fract = 1.0 - (ev->y - sliderrect.get_height()/2) / railrect.get_height();
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}
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fract = min (1.0, fract);
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fract = max (0.0, fract);
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adj.set_value (scale * fract * (adj.get_upper() - adj.get_lower()));
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}
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} else {
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if (ev->state & Gdk::SHIFT_MASK) {
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adj.set_value (default_value);
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cerr << "default value = " << default_value << endl;
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}
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}
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break;
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case 4:
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/* wheel up */
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adj.set_value (adj.get_value() + (adj.get_page_increment() * scale));
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break;
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case 5:
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/* wheel down */
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adj.set_value (adj.get_value() - (adj.get_page_increment() * scale));
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break;
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default:
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break;
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}
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return false;
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}
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bool
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PixScroller::on_motion_notify_event (GdkEventMotion* ev)
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{
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if (dragging) {
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double fract;
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double delta;
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double scale;
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if (ev->window != grab_window) {
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grab_y = ev->y;
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grab_window = ev->window;
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return true;
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}
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if (ev->state & GDK_CONTROL_MASK) {
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if (ev->state & GDK_MOD1_MASK) {
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scale = 0.05;
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} else {
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scale = 0.1;
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}
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} else {
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scale = 1.0;
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}
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delta = ev->y - grab_y;
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grab_y = ev->y;
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fract = (delta / railrect.get_height());
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fract = min (1.0, fract);
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fract = max (-1.0, fract);
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fract = -fract;
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adj.set_value (adj.get_value() + scale * fract * (adj.get_upper() - adj.get_lower()));
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}
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return true;
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}
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void
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PixScroller::adjustment_changed ()
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{
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int y = (int) rint ((overall_height - sliderrect.get_height()) * (adj.get_upper() - adj.get_value()));
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if (y != sliderrect.get_y()) {
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sliderrect.set_y(y);
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queue_draw ();
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}
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}
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