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examples: Handle input entering popup in layer-shell 

Change the cursor when entering the popup and make mouse buttons change
the red component of the square. This makes sure we can handle input
correctly.
This commit is contained in:
Guido Günther 2018-04-23 09:53:46 +02:00
parent 57cc4c319d
commit 5209c79702
1 changed files with 44 additions and 17 deletions
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61
examples/layer-shell.c
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@ -45,7 +45,7 @@ struct wl_egl_window *popup_egl_window;
static uint32_t popup_width = 256, popup_height = 256;
struct wlr_egl_surface *popup_egl_surface;
struct wl_callback *popup_frame_callback;
float popup_alpha = 1.0;
float popup_alpha = 1.0, popup_red = 0.5f;
static uint32_t layer = ZWLR_LAYER_SHELL_V1_LAYER_BACKGROUND;
static uint32_t anchor = 0;
@ -59,9 +59,9 @@ static double frame = 0;
static int cur_x = -1, cur_y = -1;
static int buttons = 0;
struct wl_cursor_theme *cursor_theme;
struct wl_cursor_image *cursor_image;
struct wl_surface *cursor_surface;
struct wl_cursor_image *popup_cursor_image;
struct wl_surface *cursor_surface, *input_surface;
static struct {
struct timespec last_frame;
@ -154,7 +154,7 @@ static void draw_popup() {
eglMakeCurrent(egl.display, popup_egl_surface, popup_egl_surface, egl.context);
glViewport(0, 0, popup_width, popup_height);
glClearColor(0.5f, 0.5f, 0.5f, popup_alpha);
glClearColor(popup_red, 0.5f, 0.5f, popup_alpha);
popup_alpha += alpha_mod;
if (popup_alpha < 0.01 || popup_alpha >= 1.0f) {
alpha_mod *= -1.0;
@ -267,11 +267,20 @@ struct zwlr_layer_surface_v1_listener layer_surface_listener = {
static void wl_pointer_enter(void *data, struct wl_pointer *wl_pointer,
uint32_t serial, struct wl_surface *surface,
wl_fixed_t surface_x, wl_fixed_t surface_y) {
struct wl_cursor_image *image;
if (surface == popup_wl_surface) {
image = popup_cursor_image;
} else {
image = cursor_image;
}
wl_surface_attach(cursor_surface,
wl_cursor_image_get_buffer(cursor_image), 0, 0);
wl_pointer_set_cursor(wl_pointer, serial, cursor_surface,
cursor_image->hotspot_x, cursor_image->hotspot_y);
wl_cursor_image_get_buffer(image), 0, 0);
wl_surface_damage(cursor_surface, 1, 0,
image->width, image->height);
wl_surface_commit(cursor_surface);
wl_pointer_set_cursor(wl_pointer, serial, cursor_surface,
image->hotspot_x, image->hotspot_y);
input_surface = surface;
}
static void wl_pointer_leave(void *data, struct wl_pointer *wl_pointer,
@ -288,16 +297,28 @@ static void wl_pointer_motion(void *data, struct wl_pointer *wl_pointer,
static void wl_pointer_button(void *data, struct wl_pointer *wl_pointer,
uint32_t serial, uint32_t time, uint32_t button, uint32_t state) {
if (state == WL_POINTER_BUTTON_STATE_PRESSED) {
if (button == BTN_RIGHT) {
create_popup();
if (input_surface == wl_surface) {
if (state == WL_POINTER_BUTTON_STATE_PRESSED) {
if (button == BTN_RIGHT) {
create_popup();
} else {
buttons++;
}
} else {
buttons++;
if (button != BTN_RIGHT) {
buttons--;
}
}
} else if (input_surface == popup_wl_surface) {
if (state == WL_POINTER_BUTTON_STATE_PRESSED) {
if (button == BTN_LEFT && popup_red <= 0.9f) {
popup_red += 0.1;
} else if (button == BTN_RIGHT && popup_red >= 0.1f) {
popup_red -= 0.1;
}
}
} else {
if (button != BTN_RIGHT) {
buttons--;
}
assert(false && "Unknown surface");
}
}
@ -557,12 +578,18 @@ int main(int argc, char **argv) {
return 1;
}
cursor_theme = wl_cursor_theme_load(NULL, 16, shm);
struct wl_cursor_theme *cursor_theme =
wl_cursor_theme_load(NULL, 16, shm);
assert(cursor_theme);
struct wl_cursor *cursor;
cursor = wl_cursor_theme_get_cursor(cursor_theme, "crosshair");
struct wl_cursor *cursor =
wl_cursor_theme_get_cursor(cursor_theme, "crosshair");
assert(cursor);
cursor_image = cursor->images[0];
cursor = wl_cursor_theme_get_cursor(cursor_theme, "tcross");
assert(cursor);
popup_cursor_image = cursor->images[0];
cursor_surface = wl_compositor_create_surface(compositor);
assert(cursor_surface);