1
0
mirror of git://projects.qi-hardware.com/eda-tools.git synced 2024-12-24 04:38:37 +02:00
eda-tools/eeshow/gui/progress.c

100 lines
2.1 KiB
C
Raw Normal View History

/*
* gui/progress.c - Progress bar
*
* Written 2016 by Werner Almesberger
* Copyright 2016 by Werner Almesberger
*
* 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.
*/
/*
* Resources:
*
* http://zetcode.com/gfx/cairo/cairobackends/
* https://developer.gnome.org/gtk3/stable/gtk-migrating-2-to-3.html
*/
#include <stdbool.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <math.h>
#include <cairo/cairo.h>
#include <gtk/gtk.h>
#include "gui/common.h"
#define PROGRESS_BAR_HEIGHT 10
static void progress_draw_event(GtkWidget *widget, cairo_t *cr,
gpointer user_data)
{
GtkAllocation alloc;
struct gui_ctx *ctx = user_data;
unsigned w, x;
x = ctx->progress >> ctx->progress_scale;
if (!x) {
/* @@@ needed ? Gtk seems to always clear the the surface. */
cairo_set_source_rgb(cr, 1, 1, 1);
cairo_paint(cr);
}
gtk_widget_get_allocation(ctx->da, &alloc);
w = ctx->hist_size >> ctx->progress_scale;
cairo_save(cr);
cairo_translate(cr,
(alloc.width - w) / 2, (alloc.height - PROGRESS_BAR_HEIGHT) / 2);
cairo_set_source_rgb(cr, 0, 0.7, 0);
cairo_set_line_width(cr, 0);
cairo_rectangle(cr, 0, 0, x, PROGRESS_BAR_HEIGHT);
cairo_fill(cr);
cairo_set_source_rgb(cr, 0, 0, 0);
cairo_set_line_width(cr, 2);
cairo_rectangle(cr, 0, 0, w, PROGRESS_BAR_HEIGHT);
cairo_stroke(cr);
cairo_restore(cr);
}
void setup_progress_bar(struct gui_ctx *ctx, GtkWidget *window)
{
GtkAllocation alloc;
gtk_widget_get_allocation(ctx->da, &alloc);
ctx->progress_scale = 0;
while ((ctx->hist_size >> ctx->progress_scale) > alloc.width)
ctx->progress_scale++;
ctx->progress = 0;
g_signal_connect(G_OBJECT(ctx->da), "draw",
G_CALLBACK(progress_draw_event), ctx);
redraw(ctx);
gtk_main_iteration_do(0);
}
void progress_update(struct gui_ctx *ctx)
{
unsigned mask = (1 << ctx->progress_scale) - 1;
ctx->progress++;
if ((ctx->progress & mask) != mask)
return;
redraw(ctx);
gtk_main_iteration_do(0);
}