1 files changed, 294 insertions, 0 deletions
diff --git a/clients/resizor.c b/clients/resizor.c
new file mode 100644
index 00000000..68e4bf9a
--- /dev/null
+++ b/clients/resizor.c
@@ -0,0 +1,294 @@
+/*
+ * Copyright © 2010 Intel Corporation
+ *
+ * Permission to use, copy, modify, distribute, and sell this software and its
+ * documentation for any purpose is hereby granted without fee, provided that
+ * the above copyright notice appear in all copies and that both that copyright
+ * notice and this permission notice appear in supporting documentation, and
+ * that the name of the copyright holders not be used in advertising or
+ * publicity pertaining to distribution of the software without specific,
+ * written prior permission.  The copyright holders make no representations
+ * about the suitability of this software for any purpose.  It is provided "as
+ * is" without express or implied warranty.
+ *
+ * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
+ * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
+ * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
+ * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
+ * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
+ * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
+ * OF THIS SOFTWARE.
+ */
+
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <cairo.h>
+#include <math.h>
+#include <assert.h>
+
+#include <linux/input.h>
+#include <wayland-client.h>
+
+#include "window.h"
+
+struct spring {
+	double current;
+	double target;
+	double previous;
+};
+
+struct resizor {
+	struct display *display;
+	struct window *window;
+	struct widget *widget;
+	struct window *menu;
+	struct spring width;
+	struct spring height;
+	struct wl_callback *frame_callback;
+};
+
+static void
+spring_update(struct spring *spring)
+{
+	double current, force;
+
+	current = spring->current;
+	force = (spring->target - current) / 20.0 +
+		(spring->previous - current);
+
+	spring->current = current + (current - spring->previous) + force;
+	spring->previous = current;
+}
+
+static int
+spring_done(struct spring *spring)
+{
+	return fabs(spring->previous - spring->target) < 0.1;
+}
+
+static const struct wl_callback_listener listener;
+
+static void
+frame_callback(void *data, struct wl_callback *callback, uint32_t time)
+{
+	struct resizor *resizor = data;
+
+	assert(!callback || callback == resizor->frame_callback);
+
+	spring_update(&resizor->width);
+	spring_update(&resizor->height);
+
+	widget_schedule_resize(resizor->widget,
+			       resizor->width.current + 0.5,
+			       resizor->height.current + 0.5);
+
+	if (resizor->frame_callback) {
+		wl_callback_destroy(resizor->frame_callback);
+		resizor->frame_callback = NULL;
+	}
+
+	if (!spring_done(&resizor->width) || !spring_done(&resizor->height)) {
+		resizor->frame_callback =
+			wl_surface_frame(
+				window_get_wl_surface(resizor->window));
+		wl_callback_add_listener(resizor->frame_callback, &listener,
+					 resizor);
+	}
+}
+
+static const struct wl_callback_listener listener = {
+	frame_callback
+};
+
+static void
+redraw_handler(struct widget *widget, void *data)
+{
+	struct resizor *resizor = data;
+	cairo_surface_t *surface;
+	cairo_t *cr;
+	struct rectangle allocation;
+
+	widget_get_allocation(resizor->widget, &allocation);
+
+	surface = window_get_surface(resizor->window);
+
+	cr = cairo_create(surface);
+	cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
+	cairo_rectangle(cr,
+			allocation.x,
+			allocation.y,
+			allocation.width,
+			allocation.height);
+	cairo_set_source_rgba(cr, 0, 0, 0, 0.8);
+	cairo_fill(cr);
+	cairo_destroy(cr);
+
+	cairo_surface_destroy(surface);
+}
+
+static void
+keyboard_focus_handler(struct window *window,
+		       struct input *device, void *data)
+{
+	struct resizor *resizor = data;
+
+	window_schedule_redraw(resizor->window);
+}
+
+static void
+key_handler(struct window *window, struct input *input, uint32_t time,
+	    uint32_t key, uint32_t sym, enum wl_keyboard_key_state state,
+	    void *data)
+{
+	struct resizor *resizor = data;
+	struct rectangle allocation;
+
+	if (state == WL_KEYBOARD_KEY_STATE_RELEASED)
+		return;
+
+	window_get_allocation(resizor->window, &allocation);
+	resizor->width.current = allocation.width;
+	if (spring_done(&resizor->width))
+		resizor->width.target = allocation.width;
+	resizor->height.current = allocation.height;
+	if (spring_done(&resizor->height))
+		resizor->height.target = allocation.height;
+
+	switch (sym) {
+	case XKB_KEY_Up:
+		if (allocation.height < 400)
+			break;
+
+		resizor->height.target = allocation.height - 200;
+		break;
+
+	case XKB_KEY_Down:
+		if (allocation.height > 1000)
+			break;
+
+		resizor->height.target = allocation.height + 200;
+		break;
+
+	case XKB_KEY_Left:
+		if (allocation.width < 400)
+			break;
+
+		resizor->width.target = allocation.width - 200;
+		break;
+
+	case XKB_KEY_Right:
+		if (allocation.width > 1000)
+			break;
+
+		resizor->width.target = allocation.width + 200;
+		break;
+
+	case XKB_KEY_Escape:
+		display_exit(resizor->display);
+		break;
+	}
+
+	if (!resizor->frame_callback)
+		frame_callback(resizor, NULL, 0);
+}
+
+static void
+menu_func(struct window *window, int index, void *user_data)
+{
+	fprintf(stderr, "picked entry %d\n", index);
+}
+
+static void
+show_menu(struct resizor *resizor, struct input *input, uint32_t time)
+{
+	int32_t x, y;
+	static const char *entries[] = {
+		"Roy", "Pris", "Leon", "Zhora"
+	};
+
+	input_get_position(input, &x, &y);
+	window_show_menu(resizor->display, input, time, resizor->window,
+			 x - 10, y - 10, menu_func, entries, 4);
+}
+
+static void
+button_handler(struct widget *widget,
+	       struct input *input, uint32_t time,
+	       uint32_t button, enum wl_pointer_button_state state, void *data)
+{
+	struct resizor *resizor = data;
+
+	switch (button) {
+	case BTN_RIGHT:
+		if (state == WL_POINTER_BUTTON_STATE_PRESSED)
+			show_menu(resizor, input, time);
+		break;
+	}
+}
+
+static struct resizor *
+resizor_create(struct display *display)
+{
+	struct resizor *resizor;
+
+	resizor = xzalloc(sizeof *resizor);
+	resizor->window = window_create(display);
+	resizor->widget = frame_create(resizor->window, resizor);
+	window_set_title(resizor->window, "Wayland Resizor");
+	resizor->display = display;
+
+	window_set_key_handler(resizor->window, key_handler);
+	window_set_user_data(resizor->window, resizor);
+	widget_set_redraw_handler(resizor->widget, redraw_handler);
+	window_set_keyboard_focus_handler(resizor->window,
+					  keyboard_focus_handler);
+
+	widget_set_button_handler(resizor->widget, button_handler);
+
+	resizor->height.previous = 400;
+	resizor->height.current = 400;
+	resizor->height.target = 400;
+
+	resizor->width.previous = 400;
+	resizor->width.current = 400;
+	resizor->width.target = 400;
+
+	widget_schedule_resize(resizor->widget, 400, 400);
+
+	return resizor;
+}
+
+static void
+resizor_destroy(struct resizor *resizor)
+{
+	if (resizor->frame_callback)
+		wl_callback_destroy(resizor->frame_callback);
+
+	widget_destroy(resizor->widget);
+	window_destroy(resizor->window);
+	free(resizor);
+}
+
+int
+main(int argc, char *argv[])
+{
+	struct display *display;
+	struct resizor *resizor;
+
+	display = display_create(&argc, argv);
+	if (display == NULL) {
+		fprintf(stderr, "failed to create display: %m\n");
+		return -1;
+	}
+
+	resizor = resizor_create(display);
+
+	display_run(display);
+
+	resizor_destroy(resizor);
+	display_destroy(display);
+
+	return 0;
+}