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GxVSlider.cpp    208 lines (189 with data), 8.3 kB

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/*
* Copyright (C) 2009, 2010 Hermann Meyer, James Warden, Andreas Degert
*
* 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "GxVSlider.h"
#define P_(s) (s) // FIXME -> gettext
static gboolean gx_vslider_expose (GtkWidget *widget, GdkEventExpose *event);
static void gx_vslider_size_request (GtkWidget *widget, GtkRequisition *requisition);
static gboolean gx_vslider_button_press (GtkWidget *widget, GdkEventButton *event);
static gboolean gx_vslider_pointer_motion (GtkWidget *widget, GdkEventMotion *event);
static gboolean gx_vslider_enter_in (GtkWidget *widget, GdkEventCrossing *event);
static gboolean gx_vslider_leave_out (GtkWidget *widget, GdkEventCrossing *event);
G_DEFINE_TYPE(GxVSlider, gx_vslider, GX_TYPE_REGLER);
#define get_stock_id(widget) (GX_VSLIDER_CLASS(GTK_OBJECT_GET_CLASS(widget))->stock_id)
static void gx_vslider_class_init(GxVSliderClass *klass)
{
GtkWidgetClass *widget_class = (GtkWidgetClass*)klass;
widget_class->expose_event = gx_vslider_expose;
widget_class->size_request = gx_vslider_size_request;
widget_class->button_press_event = gx_vslider_button_press;
widget_class->motion_notify_event = gx_vslider_pointer_motion;
widget_class->enter_notify_event = gx_vslider_enter_in;
widget_class->leave_notify_event = gx_vslider_leave_out;
klass->stock_id = "vslider";
gtk_widget_class_install_style_property(
widget_class,
g_param_spec_int("slider-width",P_("size of slider"),
P_("Height of movable part of vslider"),
0, 100, 20, GParamFlags(G_PARAM_READABLE|G_PARAM_STATIC_STRINGS)));
}
static void gx_vslider_size_request (GtkWidget *widget, GtkRequisition *requisition)
{
g_assert(GX_IS_VSLIDER(widget));
gint slider_height;
gtk_widget_style_get(widget, "slider-width", &slider_height, NULL);
GdkPixbuf *pb = gtk_widget_render_icon(widget, get_stock_id(widget), GtkIconSize(-1), NULL);
requisition->width = gdk_pixbuf_get_width(pb);
requisition->height = gdk_pixbuf_get_height(pb) - slider_height;
_gx_regler_calc_size_request(GX_REGLER(widget), requisition);
g_object_unref(pb);
}
static void vslider_expose(
GtkWidget *widget, GdkRectangle *rect, gdouble sliderstate, GdkPixbuf *image,
gdouble sat, gboolean has_focus, gboolean paint_focus)
{
gint slider_height;
gtk_widget_style_get(widget, "slider-width", &slider_height, NULL);
GdkPixbuf *image1 = gdk_pixbuf_copy(image);
gdk_pixbuf_copy_area(image, 0, rect->height, rect->width, slider_height,
image1, 0, rect->height-(int)sliderstate-slider_height);
if (has_focus) {
//gdk_pixbuf_saturate_and_pixelate(image1, image1, sat, FALSE);
if (paint_focus) {
gtk_paint_focus(widget->style, widget->window, GTK_STATE_NORMAL, NULL, widget, NULL,
rect->x, rect->y, rect->width, rect->height);
}
}
gdk_draw_pixbuf(GDK_DRAWABLE(widget->window), widget->style->fg_gc[0],
image1, 0, 0, rect->x, rect->y,
rect->width, rect->height, GDK_RGB_DITHER_NORMAL, 0, 0);
g_object_unref(image1);
}
static const gdouble sat = 70.0;
static gboolean gx_vslider_expose(GtkWidget *widget, GdkEventExpose *event)
{
g_assert(GX_IS_VSLIDER(widget));
gint slider_height;
GdkRectangle image_rect, value_rect;
GdkPixbuf *pb = gtk_widget_render_icon(widget, get_stock_id(widget), GtkIconSize(-1), NULL);
gtk_widget_style_get(widget, "slider-width", &slider_height, NULL);
image_rect.width = gdk_pixbuf_get_width(pb);
image_rect.height = gdk_pixbuf_get_height(pb) - slider_height;
gdouble sliderstate = _gx_regler_get_step_pos(GX_REGLER(widget), image_rect.height-slider_height);
_gx_regler_get_positions(GX_REGLER(widget), &image_rect, &value_rect);
vslider_expose(widget, &image_rect, sliderstate, pb, sat, gtk_widget_has_focus(widget), TRUE);
_gx_regler_display_value(GX_REGLER(widget), &value_rect);
g_object_unref(pb);
return FALSE;
}
static gboolean gx_vslider_enter_in (GtkWidget *widget, GdkEventCrossing *event)
{
g_assert(GX_IS_VSLIDER(widget));
gint slider_height;
GdkRectangle image_rect, value_rect;
GdkPixbuf *pb = gtk_widget_render_icon(widget, get_stock_id(widget), GtkIconSize(-1), NULL);
gtk_widget_style_get(widget, "slider-width", &slider_height, NULL);
image_rect.width = gdk_pixbuf_get_width(pb);
image_rect.height = gdk_pixbuf_get_height(pb) - slider_height;
gdouble sliderstate = _gx_regler_get_step_pos(GX_REGLER(widget), image_rect.height-slider_height);
_gx_regler_get_positions(GX_REGLER(widget), &image_rect, &value_rect);
vslider_expose(widget, &image_rect, sliderstate, pb, sat, TRUE, FALSE);
g_object_unref(pb);
return TRUE;
}
static gboolean gx_vslider_leave_out (GtkWidget *widget, GdkEventCrossing *event)
{
g_assert(GX_IS_VSLIDER(widget));
gint slider_height;
GdkRectangle image_rect, value_rect;
GdkPixbuf *pb = gtk_widget_render_icon(widget, get_stock_id(widget), GtkIconSize(-1), NULL);
gtk_widget_style_get(widget, "slider-width", &slider_height, NULL);
image_rect.width = gdk_pixbuf_get_width(pb);
image_rect.height = gdk_pixbuf_get_height(pb) - slider_height;
gdouble sliderstate = _gx_regler_get_step_pos(GX_REGLER(widget), image_rect.height-slider_height);
_gx_regler_get_positions(GX_REGLER(widget), &image_rect, &value_rect);
vslider_expose(widget, &image_rect, sliderstate, pb, sat, FALSE, FALSE);
g_object_unref(pb);
return TRUE;
}
static inline void get_width_height(GtkWidget *widget, GdkRectangle *r)
{
GdkPixbuf *pb = gtk_widget_render_icon(widget, get_stock_id(widget), GtkIconSize(-1), NULL);
r->width = gdk_pixbuf_get_width(pb);
r->height = gdk_pixbuf_get_height(pb);
g_object_unref(pb);
}
static gboolean slider_set_from_pointer(GtkWidget *widget, int state, gdouble x, gdouble y, gboolean drag, gint button, GdkEventButton *event)
{
gint slider_height;
gtk_widget_style_get(widget, "slider-width", &slider_height, NULL);
GdkRectangle image_rect, value_rect;
get_width_height(widget, &image_rect);
image_rect.height -= slider_height;
x += widget->allocation.x;
y += widget->allocation.y;
_gx_regler_get_positions(GX_REGLER(widget), &image_rect, &value_rect);
if (!drag) {
if (_gx_regler_check_display_popup(GX_REGLER(widget), &image_rect, &value_rect, event)) {
return FALSE;
}
}
gint height = image_rect.height - slider_height;
gint off = image_rect.y + slider_height/2;
GtkAdjustment *adj = gtk_range_get_adjustment(GTK_RANGE(widget));
static double last_y = 2e20;
if (!drag) {
last_y = y;
if (event && event->type == GDK_2BUTTON_PRESS) {
double value = adj->upper - ((y - off)/height)* (adj->upper - adj->lower);
gtk_range_set_value(GTK_RANGE(widget), value);
}
} else {
double value = ((last_y - y) / height) * (adj->upper - adj->lower);
if (state & (GDK_CONTROL_MASK|GDK_SHIFT_MASK)) {
value *= 0.1;
}
last_y = y;
gtk_range_set_value(GTK_RANGE(widget), adj->value + value);
}
return TRUE;
}
static gboolean gx_vslider_button_press (GtkWidget *widget, GdkEventButton *event)
{
g_assert(GX_IS_VSLIDER(widget));
if (event->button != 1 && event->button != 3) {
return FALSE;
}
gtk_widget_grab_focus(widget);
if (slider_set_from_pointer(widget, event->state, event->x, event->y, FALSE, event->button, event)) {
gtk_grab_add(widget);
}
return FALSE;
}
static gboolean gx_vslider_pointer_motion(GtkWidget *widget, GdkEventMotion *event)
{
g_assert(GX_IS_VSLIDER(widget));
if (!gtk_widget_has_grab(widget)) {
return FALSE;
}
gdk_event_request_motions (event);
slider_set_from_pointer(widget, event->state, event->x, event->y, TRUE, 0, NULL);
return FALSE;
}
static void gx_vslider_init(GxVSlider *vslider)
{
}