Add a basic image viewer to replace the one we ditched ages ago

2015-08-06 15:01:49 -07:00 · 2015-08-06 15:01:49 -07:00 · c3fd67d529
commit c3fd67d529
parent 2e65c8667f
1 changed files with 166 additions and 0 deletions
--- a/userspace/gui/basic/imgviewer.c
+++ b/userspace/gui/basic/imgviewer.c
@ -0,0 +1,166 @@
+/* vim: tabstop=4 shiftwidth=4 noexpandtab
+ * This file is part of ToaruOS and is released under the terms
+ * of the NCSA / University of Illinois License - see LICENSE.md
+ * Copyright (C) 2015 Kevin Lange
+ *
+ * Image Viewer
+ *
+ */
+#include <stdlib.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <syscall.h>
+#include <signal.h>
+#include <errno.h>
+#include <sys/wait.h>
+
+#include "lib/yutani.h"
+#include "lib/graphics.h"
+#include "lib/decorations.h"
+#include "gui/ttk/ttk.h"
+
+#include "lib/trace.h"
+#define TRACE_APP_NAME "image-viewer"
+
+static yutani_t * yctx;
+
+static yutani_window_t * win;
+static gfx_context_t * ctx;
+
+static cairo_surface_t * surface_win;
+
+static cairo_t * cr_win;
+
+static int should_exit = 0;
+
+static int center_x(int x) {
+	return (yctx->display_width - x) / 2;
+}
+
+static int center_y(int y) {
+	return (yctx->display_height - y) / 2;
+}
+
+static int center_win_x(int x) {
+	return (win->width - x) / 2;
+}
+
+static int button_width = 100;
+static int button_height = 32;
+static int button_focused = 0;
+static void draw_next_button(int is_exit) {
+	if (button_focused == 1) {
+		/* hover */
+		_ttk_draw_button_hover(cr_win, center_win_x(button_width), 400, button_width, button_height, is_exit ? "Exit" : "Next");
+	} else if (button_focused == 2) {
+		/* Down */
+		_ttk_draw_button_select(cr_win, center_win_x(button_width), 400, button_width, button_height, is_exit ? "Exit" : "Next");
+	} else {
+		/* Something else? */
+		_ttk_draw_button(cr_win, center_win_x(button_width), 400, button_width, button_height, is_exit ? "Exit" : "Next");
+	}
+}
+
+static void draw_centered_label(int y, int size, char * label) {
+	set_font_face(FONT_SANS_SERIF);
+	set_font_size(size);
+
+	int x = center_win_x(draw_string_width(label));
+	draw_string(ctx, x, y, rgb(0,0,0), label);
+}
+
+static sprite_t image;
+static char * file_name = NULL;
+static void draw_image(void) {
+	draw_sprite(ctx, &image, decor_left_width, decor_top_height);
+}
+
+static void redraw(void) {
+	draw_fill(ctx, rgb(TTK_BACKGROUND_DEFAULT));
+	render_decorations(win, ctx, file_name);
+	draw_image();
+	flip(ctx);
+	yutani_flip(yctx, win);
+}
+
+int main(int argc, char * argv[]) {
+
+	if (argc < 2) {
+		fprintf(stderr, "Usage: %s image_file\n", argv[0]);
+		return 1;
+	}
+
+	file_name = argv[1];
+
+	load_sprite_png(&image, argv[1]);
+
+	TRACE("Opening some windows...");
+	yctx = yutani_init();
+
+	init_decorations();
+
+	win = yutani_window_create(yctx, image.width + decor_width(), image.height + decor_height());
+	yutani_window_move(yctx, win, center_x(image.width + decor_width()), center_y(image.height + decor_height()));
+	ctx = init_graphics_yutani_double_buffer(win);
+
+	int stride;
+
+	stride = cairo_format_stride_for_width(CAIRO_FORMAT_ARGB32, win->width);
+	surface_win = cairo_image_surface_create_for_data(ctx->backbuffer, CAIRO_FORMAT_ARGB32, win->width, win->height, stride);
+	cr_win = cairo_create(surface_win);
+
+	yutani_window_advertise_icon(yctx, win, "Image Viewer", "image-viewer");
+
+	redraw();
+
+	yutani_focus_window(yctx, win->wid);
+
+	while (!should_exit) {
+		yutani_msg_t * m = yutani_poll(yctx);
+
+		if (m) {
+			switch (m->type) {
+				case YUTANI_MSG_KEY_EVENT:
+					{
+						struct yutani_msg_key_event * ke = (void*)m->data;
+						if (ke->event.key == 'q' && ke->event.action == KEY_ACTION_DOWN) {
+							should_exit = 1;
+						}
+					}
+					break;
+				case YUTANI_MSG_WINDOW_FOCUS_CHANGE:
+					{
+						struct yutani_msg_window_focus_change * wf = (void*)m->data;
+						if (wf->wid == win->wid) {
+							win->focused = wf->focused;
+							redraw();
+						}
+					}
+					break;
+				case YUTANI_MSG_WINDOW_MOUSE_EVENT:
+					{
+						struct yutani_msg_window_mouse_event * me = (void*)m->data;
+						if (me->wid != win->wid) break;
+						int result = decor_handle_event(yctx, m);
+						switch (result) {
+							case DECOR_CLOSE:
+								should_exit = 1;
+								break;
+							default:
+								/* Other actions */
+								break;
+						}
+					}
+					break;
+				case YUTANI_MSG_SESSION_END:
+					should_exit = 1;
+					break;
+				default:
+					break;
+			}
+			free(m);
+		}
+	}
+
+	return 0;
+}