diff options
Diffstat (limited to 'libs/gtkmm2ext/pixscroller.cc')
-rw-r--r-- | libs/gtkmm2ext/pixscroller.cc | 248 |
1 files changed, 248 insertions, 0 deletions
diff --git a/libs/gtkmm2ext/pixscroller.cc b/libs/gtkmm2ext/pixscroller.cc new file mode 100644 index 0000000000..78f1725271 --- /dev/null +++ b/libs/gtkmm2ext/pixscroller.cc @@ -0,0 +1,248 @@ +/* + Copyright (C) 2005 Paul Davis + + This program 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., 675 Mass Ave, Cambridge, MA 02139, USA. + + $Id$ +*/ +#include <iostream> +#include <algorithm> +#include <cmath> + +#include <gtkmm.h> + +#include <gtkmm2ext/pixscroller.h> + +using namespace std; +using namespace Gtk; +using namespace Gtkmm2ext; + +PixScroller::PixScroller (Adjustment& a, Pix& pix) + : adj (a) +{ + dragging = false; + add_events (Gdk::BUTTON_PRESS_MASK|Gdk::BUTTON_RELEASE_MASK|Gdk::POINTER_MOTION_MASK); + + adj.signal_value_changed().connect (mem_fun (*this, &PixScroller::adjustment_changed)); + default_value = adj.get_value(); + + pix.generate (); + + rail = *(pix.pixmap (0)); + rail_mask = *(pix.shape_mask (0)); + slider = *(pix.pixmap (1)); + slider_mask = *(pix.shape_mask (1)); + + int w, h; + + slider->get_size (w, h); + sliderrect.set_width(w); + sliderrect.set_height(h); + rail->get_size (w, h); + railrect.set_width(w); + railrect.set_height(h); + + railrect.set_y(sliderrect.get_height() / 2); + sliderrect.set_x(0); + + overall_height = railrect.get_height() + sliderrect.get_height(); + + sliderrect.set_y((int) rint ((overall_height - sliderrect.get_height()) * (adj.get_upper() - adj.get_value()))); + railrect.set_x((sliderrect.get_width() / 2) - 3); +} + +void +PixScroller::on_size_request (GtkRequisition* requisition) +{ + requisition->width = sliderrect.get_width(); + requisition->height = overall_height; +} + +bool +PixScroller::on_expose_event (GdkEventExpose* ev) +{ + GdkRectangle intersect; + Glib::RefPtr<Gdk::Window> win (get_window()); + + win->draw_rectangle (get_style()->get_bg_gc(get_state()), TRUE, + ev->area.x, + ev->area.y, + ev->area.width, + ev->area.height); + + if (gdk_rectangle_intersect (railrect.gobj(), &ev->area, &intersect)) { + Glib::RefPtr<Gdk::GC> gc(get_style()->get_bg_gc(get_state())); + win->draw_drawable (gc, rail, + intersect.x - railrect.get_x(), + intersect.y - railrect.get_y(), + intersect.x, + intersect.y, + intersect.width, + intersect.height); + } + + if (gdk_rectangle_intersect (sliderrect.gobj(), &ev->area, &intersect)) { + Glib::RefPtr<Gdk::GC> gc(get_style()->get_fg_gc(get_state())); + Glib::RefPtr<Gdk::Bitmap> mask (slider_mask); +// Do these have a gtk2 equivalent? +// Gdk::GCValues values; +// gc->get_values(values); + gc->set_clip_origin (sliderrect.get_x(), sliderrect.get_y()); + gc->set_clip_mask (mask); + win->draw_drawable (gc, slider, + intersect.x - sliderrect.get_x(), + intersect.y - sliderrect.get_y(), + intersect.x, + intersect.y, + intersect.width, + intersect.height); +// gc->set_clip_origin(values.clip_x_origin, values.clip_y_origin); +// Gdk::Bitmap i_hate_gdk (values.clip_mask); +// gc->set_clip_mask (i_hate_gdk); + } + + + return true; +} + +bool +PixScroller::on_button_press_event (GdkEventButton* ev) +{ + switch (ev->button) { + case 1: + if (!(ev->state & Gdk::SHIFT_MASK)) { + add_modal_grab(); + grab_y = ev->y; + grab_start = ev->y; + grab_window = ev->window; + dragging = true; + } + break; + default: + break; + } + + + return false; +} + +bool +PixScroller::on_button_release_event (GdkEventButton* ev) +{ + double scale; + + if (ev->state & GDK_CONTROL_MASK) { + if (ev->state & GDK_MOD1_MASK) { + scale = 0.05; + } else { + scale = 0.1; + } + } else { + scale = 1.0; + } + + switch (ev->button) { + case 1: + if (dragging) { + remove_modal_grab(); + dragging = false; + + if (ev->y == grab_start) { + /* no motion - just a click */ + double fract; + + if (ev->y < sliderrect.get_height()/2) { + /* near the top */ + fract = 1.0; + } else { + fract = 1.0 - (ev->y - sliderrect.get_height()/2) / railrect.get_height(); + } + + fract = min (1.0, fract); + fract = max (0.0, fract); + + adj.set_value (scale * fract * (adj.get_upper() - adj.get_lower())); + } + } else { + if (ev->state & Gdk::SHIFT_MASK) { + adj.set_value (default_value); + cerr << "default value = " << default_value << endl; + } + } + break; + case 4: + /* wheel up */ + adj.set_value (adj.get_value() + (adj.get_page_increment() * scale)); + break; + case 5: + /* wheel down */ + adj.set_value (adj.get_value() - (adj.get_page_increment() * scale)); + break; + default: + break; + } + return false; +} + +bool +PixScroller::on_motion_notify_event (GdkEventMotion* ev) +{ + if (dragging) { + double fract; + double delta; + double scale; + + if (ev->window != grab_window) { + grab_y = ev->y; + grab_window = ev->window; + return true; + } + + if (ev->state & GDK_CONTROL_MASK) { + if (ev->state & GDK_MOD1_MASK) { + scale = 0.05; + } else { + scale = 0.1; + } + } else { + scale = 1.0; + } + + delta = ev->y - grab_y; + grab_y = ev->y; + + fract = (delta / railrect.get_height()); + + fract = min (1.0, fract); + fract = max (-1.0, fract); + + fract = -fract; + + adj.set_value (adj.get_value() + scale * fract * (adj.get_upper() - adj.get_lower())); + } + + return true; +} + +void +PixScroller::adjustment_changed () +{ + int y = (int) rint ((overall_height - sliderrect.get_height()) * (adj.get_upper() - adj.get_value())); + + if (y != sliderrect.get_y()) { + sliderrect.set_y(y); + queue_draw (); + } +} |