Stepan Salenikovich | 5c54b35 | 2016-09-14 14:28:19 -0400 | [diff] [blame] | 1 | /* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*- |
| 2 | * |
| 3 | * Copyright 2009 Red Hat, Inc, |
| 4 | * |
| 5 | * This program is free software; you can redistribute it and/or modify |
| 6 | * it under the terms of the GNU General Public License as published by |
| 7 | * the Free Software Foundation; either version 2 of the License, or |
| 8 | * (at your option) any later version. |
| 9 | * |
| 10 | * This program is distributed in the hope that it will be useful, |
| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 13 | * GNU General Public License for more details. |
| 14 | * |
| 15 | * You should have received a copy of the GNU General Public License |
| 16 | * along with this program; if not, see <http://www.gnu.org/licenses/>. |
| 17 | * |
| 18 | * Written by: Matthias Clasen <mclasen@redhat.com> |
| 19 | */ |
| 20 | |
| 21 | #include "config.h" |
| 22 | |
| 23 | #include <stdlib.h> |
| 24 | |
| 25 | #include <glib.h> |
| 26 | #include <glib/gi18n.h> |
| 27 | #include <gtk/gtk.h> |
| 28 | |
| 29 | #include "cc-crop-area.h" |
| 30 | |
| 31 | struct _CcCropAreaPrivate { |
| 32 | GdkPixbuf *browse_pixbuf; |
| 33 | GdkPixbuf *pixbuf; |
| 34 | GdkPixbuf *color_shifted; |
| 35 | gdouble scale; |
| 36 | GdkRectangle image; |
| 37 | GdkCursorType current_cursor; |
| 38 | GdkRectangle crop; |
| 39 | gint active_region; |
| 40 | gint last_press_x; |
| 41 | gint last_press_y; |
| 42 | gint base_width; |
| 43 | gint base_height; |
| 44 | gdouble aspect; |
| 45 | }; |
| 46 | |
| 47 | G_DEFINE_TYPE (CcCropArea, cc_crop_area, GTK_TYPE_DRAWING_AREA); |
| 48 | |
| 49 | static inline guchar |
| 50 | shift_color_byte (guchar b, |
| 51 | int shift) |
| 52 | { |
| 53 | return CLAMP(b + shift, 0, 255); |
| 54 | } |
| 55 | |
| 56 | static void |
| 57 | shift_colors (GdkPixbuf *pixbuf, |
| 58 | gint red, |
| 59 | gint green, |
| 60 | gint blue, |
| 61 | gint alpha) |
| 62 | { |
| 63 | gint x, y, offset, y_offset, rowstride, width, height; |
| 64 | guchar *pixels; |
| 65 | gint channels; |
| 66 | |
| 67 | width = gdk_pixbuf_get_width (pixbuf); |
| 68 | height = gdk_pixbuf_get_height (pixbuf); |
| 69 | rowstride = gdk_pixbuf_get_rowstride (pixbuf); |
| 70 | pixels = gdk_pixbuf_get_pixels (pixbuf); |
| 71 | channels = gdk_pixbuf_get_n_channels (pixbuf); |
| 72 | |
| 73 | for (y = 0; y < height; y++) { |
| 74 | y_offset = y * rowstride; |
| 75 | for (x = 0; x < width; x++) { |
| 76 | offset = y_offset + x * channels; |
| 77 | if (red != 0) |
| 78 | pixels[offset] = shift_color_byte (pixels[offset], red); |
| 79 | if (green != 0) |
| 80 | pixels[offset + 1] = shift_color_byte (pixels[offset + 1], green); |
| 81 | if (blue != 0) |
| 82 | pixels[offset + 2] = shift_color_byte (pixels[offset + 2], blue); |
| 83 | if (alpha != 0 && channels >= 4) |
| 84 | pixels[offset + 3] = shift_color_byte (pixels[offset + 3], blue); |
| 85 | } |
| 86 | } |
| 87 | } |
| 88 | |
| 89 | static void |
| 90 | update_pixbufs (CcCropArea *area) |
| 91 | { |
| 92 | gint width; |
| 93 | gint height; |
| 94 | GtkAllocation allocation; |
| 95 | gdouble scale; |
| 96 | gint dest_width, dest_height; |
| 97 | GtkWidget *widget; |
| 98 | |
| 99 | widget = GTK_WIDGET (area); |
| 100 | gtk_widget_get_allocation (widget, &allocation); |
| 101 | |
| 102 | width = gdk_pixbuf_get_width (area->priv->browse_pixbuf); |
| 103 | height = gdk_pixbuf_get_height (area->priv->browse_pixbuf); |
| 104 | |
| 105 | scale = allocation.height / (gdouble)height; |
| 106 | if (scale * width > allocation.width) |
| 107 | scale = allocation.width / (gdouble)width; |
| 108 | |
| 109 | dest_width = width * scale; |
| 110 | dest_height = height * scale; |
| 111 | |
| 112 | if (area->priv->pixbuf == NULL || |
| 113 | gdk_pixbuf_get_width (area->priv->pixbuf) != allocation.width || |
| 114 | gdk_pixbuf_get_height (area->priv->pixbuf) != allocation.height) { |
| 115 | if (area->priv->pixbuf != NULL) |
| 116 | g_object_unref (area->priv->pixbuf); |
| 117 | area->priv->pixbuf = gdk_pixbuf_new (GDK_COLORSPACE_RGB, |
| 118 | gdk_pixbuf_get_has_alpha (area->priv->browse_pixbuf), |
| 119 | 8, |
| 120 | dest_width, dest_height); |
| 121 | gdk_pixbuf_fill (area->priv->pixbuf, 0x0); |
| 122 | |
| 123 | gdk_pixbuf_scale (area->priv->browse_pixbuf, |
| 124 | area->priv->pixbuf, |
| 125 | 0, 0, |
| 126 | dest_width, dest_height, |
| 127 | 0, 0, |
| 128 | scale, scale, |
| 129 | GDK_INTERP_BILINEAR); |
| 130 | |
| 131 | if (area->priv->color_shifted) |
| 132 | g_object_unref (area->priv->color_shifted); |
| 133 | area->priv->color_shifted = gdk_pixbuf_copy (area->priv->pixbuf); |
| 134 | shift_colors (area->priv->color_shifted, -32, -32, -32, 0); |
| 135 | |
| 136 | if (area->priv->scale == 0.0) { |
| 137 | gdouble scale_to_80, scale_to_image, crop_scale; |
| 138 | |
| 139 | /* Scale the crop rectangle to 80% of the area, or less to fit the image */ |
| 140 | scale_to_80 = MIN ((gdouble)gdk_pixbuf_get_width (area->priv->pixbuf) * 0.8 / area->priv->base_width, |
| 141 | (gdouble)gdk_pixbuf_get_height (area->priv->pixbuf) * 0.8 / area->priv->base_height); |
| 142 | scale_to_image = MIN ((gdouble)dest_width / area->priv->base_width, |
| 143 | (gdouble)dest_height / area->priv->base_height); |
| 144 | crop_scale = MIN (scale_to_80, scale_to_image); |
| 145 | |
| 146 | area->priv->crop.width = crop_scale * area->priv->base_width / scale; |
| 147 | area->priv->crop.height = crop_scale * area->priv->base_height / scale; |
| 148 | area->priv->crop.x = (gdk_pixbuf_get_width (area->priv->browse_pixbuf) - area->priv->crop.width) / 2; |
| 149 | area->priv->crop.y = (gdk_pixbuf_get_height (area->priv->browse_pixbuf) - area->priv->crop.height) / 2; |
| 150 | } |
| 151 | |
| 152 | area->priv->scale = scale; |
| 153 | area->priv->image.x = (allocation.width - dest_width) / 2; |
| 154 | area->priv->image.y = (allocation.height - dest_height) / 2; |
| 155 | area->priv->image.width = dest_width; |
| 156 | area->priv->image.height = dest_height; |
| 157 | } |
| 158 | } |
| 159 | |
| 160 | static void |
| 161 | crop_to_widget (CcCropArea *area, |
| 162 | GdkRectangle *crop) |
| 163 | { |
| 164 | crop->x = area->priv->image.x + area->priv->crop.x * area->priv->scale; |
| 165 | crop->y = area->priv->image.y + area->priv->crop.y * area->priv->scale; |
| 166 | crop->width = area->priv->crop.width * area->priv->scale; |
| 167 | crop->height = area->priv->crop.height * area->priv->scale; |
| 168 | } |
| 169 | |
| 170 | typedef enum { |
| 171 | OUTSIDE, |
| 172 | INSIDE, |
| 173 | TOP, |
| 174 | TOP_LEFT, |
| 175 | TOP_RIGHT, |
| 176 | BOTTOM, |
| 177 | BOTTOM_LEFT, |
| 178 | BOTTOM_RIGHT, |
| 179 | LEFT, |
| 180 | RIGHT |
| 181 | } Location; |
| 182 | |
| 183 | static gboolean |
| 184 | cc_crop_area_draw (GtkWidget *widget, |
| 185 | cairo_t *cr) |
| 186 | { |
| 187 | GdkRectangle crop; |
| 188 | gint width, height, ix, iy; |
| 189 | CcCropArea *uarea = CC_CROP_AREA (widget); |
| 190 | |
| 191 | if (uarea->priv->browse_pixbuf == NULL) |
| 192 | return FALSE; |
| 193 | |
| 194 | update_pixbufs (uarea); |
| 195 | |
| 196 | width = gdk_pixbuf_get_width (uarea->priv->pixbuf); |
| 197 | height = gdk_pixbuf_get_height (uarea->priv->pixbuf); |
| 198 | crop_to_widget (uarea, &crop); |
| 199 | |
| 200 | ix = uarea->priv->image.x; |
| 201 | iy = uarea->priv->image.y; |
| 202 | |
| 203 | gdk_cairo_set_source_pixbuf (cr, uarea->priv->color_shifted, ix, iy); |
| 204 | cairo_rectangle (cr, ix, iy, width, crop.y - iy); |
| 205 | cairo_rectangle (cr, ix, crop.y, crop.x - ix, crop.height); |
| 206 | cairo_rectangle (cr, crop.x + crop.width, crop.y, width - crop.width - (crop.x - ix), crop.height); |
| 207 | cairo_rectangle (cr, ix, crop.y + crop.height, width, height - crop.height - (crop.y - iy)); |
| 208 | cairo_fill (cr); |
| 209 | |
| 210 | gdk_cairo_set_source_pixbuf (cr, uarea->priv->pixbuf, ix, iy); |
| 211 | cairo_rectangle (cr, crop.x, crop.y, crop.width, crop.height); |
| 212 | cairo_fill (cr); |
| 213 | |
| 214 | if (uarea->priv->active_region != OUTSIDE) { |
| 215 | gint x1, x2, y1, y2; |
| 216 | cairo_set_source_rgb (cr, 1, 1, 1); |
| 217 | cairo_set_line_width (cr, 1.0); |
| 218 | x1 = crop.x + crop.width / 3.0; |
| 219 | x2 = crop.x + 2 * crop.width / 3.0; |
| 220 | y1 = crop.y + crop.height / 3.0; |
| 221 | y2 = crop.y + 2 * crop.height / 3.0; |
| 222 | |
| 223 | cairo_move_to (cr, x1 + 0.5, crop.y); |
| 224 | cairo_line_to (cr, x1 + 0.5, crop.y + crop.height); |
| 225 | |
| 226 | cairo_move_to (cr, x2 + 0.5, crop.y); |
| 227 | cairo_line_to (cr, x2 + 0.5, crop.y + crop.height); |
| 228 | |
| 229 | cairo_move_to (cr, crop.x, y1 + 0.5); |
| 230 | cairo_line_to (cr, crop.x + crop.width, y1 + 0.5); |
| 231 | |
| 232 | cairo_move_to (cr, crop.x, y2 + 0.5); |
| 233 | cairo_line_to (cr, crop.x + crop.width, y2 + 0.5); |
| 234 | cairo_stroke (cr); |
| 235 | } |
| 236 | |
| 237 | cairo_set_source_rgb (cr, 0, 0, 0); |
| 238 | cairo_set_line_width (cr, 1.0); |
| 239 | cairo_rectangle (cr, |
| 240 | crop.x + 0.5, |
| 241 | crop.y + 0.5, |
| 242 | crop.width - 1.0, |
| 243 | crop.height - 1.0); |
| 244 | cairo_stroke (cr); |
| 245 | |
| 246 | cairo_set_source_rgb (cr, 1, 1, 1); |
| 247 | cairo_set_line_width (cr, 2.0); |
| 248 | cairo_rectangle (cr, |
| 249 | crop.x + 2.0, |
| 250 | crop.y + 2.0, |
| 251 | crop.width - 4.0, |
| 252 | crop.height - 4.0); |
| 253 | cairo_stroke (cr); |
| 254 | |
| 255 | return FALSE; |
| 256 | } |
| 257 | |
| 258 | typedef enum { |
| 259 | BELOW, |
| 260 | LOWER, |
| 261 | BETWEEN, |
| 262 | UPPER, |
| 263 | ABOVE |
| 264 | } Range; |
| 265 | |
| 266 | static Range |
| 267 | find_range (gint x, |
| 268 | gint min, |
| 269 | gint max) |
| 270 | { |
| 271 | gint tolerance = 12; |
| 272 | |
| 273 | if (x < min - tolerance) |
| 274 | return BELOW; |
| 275 | if (x <= min + tolerance) |
| 276 | return LOWER; |
| 277 | if (x < max - tolerance) |
| 278 | return BETWEEN; |
| 279 | if (x <= max + tolerance) |
| 280 | return UPPER; |
| 281 | return ABOVE; |
| 282 | } |
| 283 | |
| 284 | static Location |
| 285 | find_location (GdkRectangle *rect, |
| 286 | gint x, |
| 287 | gint y) |
| 288 | { |
| 289 | Range x_range, y_range; |
| 290 | Location location[5][5] = { |
| 291 | { OUTSIDE, OUTSIDE, OUTSIDE, OUTSIDE, OUTSIDE }, |
| 292 | { OUTSIDE, TOP_LEFT, TOP, TOP_RIGHT, OUTSIDE }, |
| 293 | { OUTSIDE, LEFT, INSIDE, RIGHT, OUTSIDE }, |
| 294 | { OUTSIDE, BOTTOM_LEFT, BOTTOM, BOTTOM_RIGHT, OUTSIDE }, |
| 295 | { OUTSIDE, OUTSIDE, OUTSIDE, OUTSIDE, OUTSIDE } |
| 296 | }; |
| 297 | |
| 298 | x_range = find_range (x, rect->x, rect->x + rect->width); |
| 299 | y_range = find_range (y, rect->y, rect->y + rect->height); |
| 300 | |
| 301 | return location[y_range][x_range]; |
| 302 | } |
| 303 | |
| 304 | static void |
| 305 | update_cursor (CcCropArea *area, |
| 306 | gint x, |
| 307 | gint y) |
| 308 | { |
| 309 | gint cursor_type; |
| 310 | GdkRectangle crop; |
| 311 | gint region; |
| 312 | |
| 313 | region = area->priv->active_region; |
| 314 | if (region == OUTSIDE) { |
| 315 | crop_to_widget (area, &crop); |
| 316 | region = find_location (&crop, x, y); |
| 317 | } |
| 318 | |
| 319 | switch (region) { |
| 320 | case OUTSIDE: |
| 321 | cursor_type = GDK_LEFT_PTR; |
| 322 | break; |
| 323 | case TOP_LEFT: |
| 324 | cursor_type = GDK_TOP_LEFT_CORNER; |
| 325 | break; |
| 326 | case TOP: |
| 327 | cursor_type = GDK_TOP_SIDE; |
| 328 | break; |
| 329 | case TOP_RIGHT: |
| 330 | cursor_type = GDK_TOP_RIGHT_CORNER; |
| 331 | break; |
| 332 | case LEFT: |
| 333 | cursor_type = GDK_LEFT_SIDE; |
| 334 | break; |
| 335 | case INSIDE: |
| 336 | cursor_type = GDK_FLEUR; |
| 337 | break; |
| 338 | case RIGHT: |
| 339 | cursor_type = GDK_RIGHT_SIDE; |
| 340 | break; |
| 341 | case BOTTOM_LEFT: |
| 342 | cursor_type = GDK_BOTTOM_LEFT_CORNER; |
| 343 | break; |
| 344 | case BOTTOM: |
| 345 | cursor_type = GDK_BOTTOM_SIDE; |
| 346 | break; |
| 347 | case BOTTOM_RIGHT: |
| 348 | cursor_type = GDK_BOTTOM_RIGHT_CORNER; |
| 349 | break; |
| 350 | default: |
| 351 | g_assert_not_reached (); |
| 352 | } |
| 353 | |
| 354 | if (cursor_type != area->priv->current_cursor) { |
| 355 | GdkCursor *cursor = gdk_cursor_new_for_display (gtk_widget_get_display (GTK_WIDGET (area)), |
| 356 | cursor_type); |
| 357 | gdk_window_set_cursor (gtk_widget_get_window (GTK_WIDGET (area)), cursor); |
| 358 | g_object_unref (cursor); |
| 359 | area->priv->current_cursor = cursor_type; |
| 360 | } |
| 361 | } |
| 362 | |
| 363 | static int |
| 364 | eval_radial_line (gdouble center_x, gdouble center_y, |
| 365 | gdouble bounds_x, gdouble bounds_y, |
| 366 | gdouble user_x) |
| 367 | { |
| 368 | gdouble decision_slope; |
| 369 | gdouble decision_intercept; |
| 370 | |
| 371 | decision_slope = (bounds_y - center_y) / (bounds_x - center_x); |
| 372 | decision_intercept = -(decision_slope * bounds_x); |
| 373 | |
| 374 | return (int) (decision_slope * user_x + decision_intercept); |
| 375 | } |
| 376 | |
| 377 | static gboolean |
| 378 | cc_crop_area_motion_notify_event (GtkWidget *widget, |
| 379 | GdkEventMotion *event) |
| 380 | { |
| 381 | CcCropArea *area = CC_CROP_AREA (widget); |
| 382 | gint x, y; |
| 383 | gint delta_x, delta_y; |
| 384 | gint width, height; |
| 385 | gint adj_width, adj_height; |
| 386 | gint pb_width, pb_height; |
| 387 | GdkRectangle damage; |
| 388 | gint left, right, top, bottom; |
| 389 | gdouble new_width, new_height; |
| 390 | gdouble center_x, center_y; |
| 391 | gint min_width, min_height; |
| 392 | |
| 393 | if (area->priv->browse_pixbuf == NULL) |
| 394 | return FALSE; |
| 395 | |
| 396 | update_cursor (area, event->x, event->y); |
| 397 | |
| 398 | crop_to_widget (area, &damage); |
| 399 | gtk_widget_queue_draw_area (widget, |
| 400 | damage.x - 1, damage.y - 1, |
| 401 | damage.width + 2, damage.height + 2); |
| 402 | |
| 403 | pb_width = gdk_pixbuf_get_width (area->priv->browse_pixbuf); |
| 404 | pb_height = gdk_pixbuf_get_height (area->priv->browse_pixbuf); |
| 405 | |
| 406 | x = (event->x - area->priv->image.x) / area->priv->scale; |
| 407 | y = (event->y - area->priv->image.y) / area->priv->scale; |
| 408 | |
| 409 | delta_x = x - area->priv->last_press_x; |
| 410 | delta_y = y - area->priv->last_press_y; |
| 411 | area->priv->last_press_x = x; |
| 412 | area->priv->last_press_y = y; |
| 413 | |
| 414 | left = area->priv->crop.x; |
| 415 | right = area->priv->crop.x + area->priv->crop.width - 1; |
| 416 | top = area->priv->crop.y; |
| 417 | bottom = area->priv->crop.y + area->priv->crop.height - 1; |
| 418 | |
| 419 | center_x = (left + right) / 2.0; |
| 420 | center_y = (top + bottom) / 2.0; |
| 421 | |
| 422 | switch (area->priv->active_region) { |
| 423 | case INSIDE: |
| 424 | width = right - left + 1; |
| 425 | height = bottom - top + 1; |
| 426 | |
| 427 | left += delta_x; |
| 428 | right += delta_x; |
| 429 | top += delta_y; |
| 430 | bottom += delta_y; |
| 431 | |
| 432 | if (left < 0) |
| 433 | left = 0; |
| 434 | if (top < 0) |
| 435 | top = 0; |
| 436 | if (right > pb_width) |
| 437 | right = pb_width; |
| 438 | if (bottom > pb_height) |
| 439 | bottom = pb_height; |
| 440 | |
| 441 | adj_width = right - left + 1; |
| 442 | adj_height = bottom - top + 1; |
| 443 | if (adj_width != width) { |
| 444 | if (delta_x < 0) |
| 445 | right = left + width - 1; |
| 446 | else |
| 447 | left = right - width + 1; |
| 448 | } |
| 449 | if (adj_height != height) { |
| 450 | if (delta_y < 0) |
| 451 | bottom = top + height - 1; |
| 452 | else |
| 453 | top = bottom - height + 1; |
| 454 | } |
| 455 | |
| 456 | break; |
| 457 | |
| 458 | case TOP_LEFT: |
| 459 | if (area->priv->aspect < 0) { |
| 460 | top = y; |
| 461 | left = x; |
| 462 | } |
| 463 | else if (y < eval_radial_line (center_x, center_y, left, top, x)) { |
| 464 | top = y; |
| 465 | new_width = (bottom - top) * area->priv->aspect; |
| 466 | left = right - new_width; |
| 467 | } |
| 468 | else { |
| 469 | left = x; |
| 470 | new_height = (right - left) / area->priv->aspect; |
| 471 | top = bottom - new_height; |
| 472 | } |
| 473 | break; |
| 474 | |
| 475 | case TOP: |
| 476 | top = y; |
| 477 | if (area->priv->aspect > 0) { |
| 478 | new_width = (bottom - top) * area->priv->aspect; |
| 479 | right = left + new_width; |
| 480 | } |
| 481 | break; |
| 482 | |
| 483 | case TOP_RIGHT: |
| 484 | if (area->priv->aspect < 0) { |
| 485 | top = y; |
| 486 | right = x; |
| 487 | } |
| 488 | else if (y < eval_radial_line (center_x, center_y, right, top, x)) { |
| 489 | top = y; |
| 490 | new_width = (bottom - top) * area->priv->aspect; |
| 491 | right = left + new_width; |
| 492 | } |
| 493 | else { |
| 494 | right = x; |
| 495 | new_height = (right - left) / area->priv->aspect; |
| 496 | top = bottom - new_height; |
| 497 | } |
| 498 | break; |
| 499 | |
| 500 | case LEFT: |
| 501 | left = x; |
| 502 | if (area->priv->aspect > 0) { |
| 503 | new_height = (right - left) / area->priv->aspect; |
| 504 | bottom = top + new_height; |
| 505 | } |
| 506 | break; |
| 507 | |
| 508 | case BOTTOM_LEFT: |
| 509 | if (area->priv->aspect < 0) { |
| 510 | bottom = y; |
| 511 | left = x; |
| 512 | } |
| 513 | else if (y < eval_radial_line (center_x, center_y, left, bottom, x)) { |
| 514 | left = x; |
| 515 | new_height = (right - left) / area->priv->aspect; |
| 516 | bottom = top + new_height; |
| 517 | } |
| 518 | else { |
| 519 | bottom = y; |
| 520 | new_width = (bottom - top) * area->priv->aspect; |
| 521 | left = right - new_width; |
| 522 | } |
| 523 | break; |
| 524 | |
| 525 | case RIGHT: |
| 526 | right = x; |
| 527 | if (area->priv->aspect > 0) { |
| 528 | new_height = (right - left) / area->priv->aspect; |
| 529 | bottom = top + new_height; |
| 530 | } |
| 531 | break; |
| 532 | |
| 533 | case BOTTOM_RIGHT: |
| 534 | if (area->priv->aspect < 0) { |
| 535 | bottom = y; |
| 536 | right = x; |
| 537 | } |
| 538 | else if (y < eval_radial_line (center_x, center_y, right, bottom, x)) { |
| 539 | right = x; |
| 540 | new_height = (right - left) / area->priv->aspect; |
| 541 | bottom = top + new_height; |
| 542 | } |
| 543 | else { |
| 544 | bottom = y; |
| 545 | new_width = (bottom - top) * area->priv->aspect; |
| 546 | right = left + new_width; |
| 547 | } |
| 548 | break; |
| 549 | |
| 550 | case BOTTOM: |
| 551 | bottom = y; |
| 552 | if (area->priv->aspect > 0) { |
| 553 | new_width = (bottom - top) * area->priv->aspect; |
| 554 | right= left + new_width; |
| 555 | } |
| 556 | break; |
| 557 | |
| 558 | default: |
| 559 | return FALSE; |
| 560 | } |
| 561 | |
| 562 | min_width = area->priv->base_width / area->priv->scale; |
| 563 | min_height = area->priv->base_height / area->priv->scale; |
| 564 | |
| 565 | width = right - left + 1; |
| 566 | height = bottom - top + 1; |
| 567 | if (area->priv->aspect < 0) { |
| 568 | if (left < 0) |
| 569 | left = 0; |
| 570 | if (top < 0) |
| 571 | top = 0; |
| 572 | if (right > pb_width) |
| 573 | right = pb_width; |
| 574 | if (bottom > pb_height) |
| 575 | bottom = pb_height; |
| 576 | |
| 577 | width = right - left + 1; |
| 578 | height = bottom - top + 1; |
| 579 | |
| 580 | switch (area->priv->active_region) { |
| 581 | case LEFT: |
| 582 | case TOP_LEFT: |
| 583 | case BOTTOM_LEFT: |
| 584 | if (width < min_width) |
| 585 | left = right - min_width; |
| 586 | break; |
| 587 | case RIGHT: |
| 588 | case TOP_RIGHT: |
| 589 | case BOTTOM_RIGHT: |
| 590 | if (width < min_width) |
| 591 | right = left + min_width; |
| 592 | break; |
| 593 | |
| 594 | default: ; |
| 595 | } |
| 596 | |
| 597 | switch (area->priv->active_region) { |
| 598 | case TOP: |
| 599 | case TOP_LEFT: |
| 600 | case TOP_RIGHT: |
| 601 | if (height < min_height) |
| 602 | top = bottom - min_height; |
| 603 | break; |
| 604 | case BOTTOM: |
| 605 | case BOTTOM_LEFT: |
| 606 | case BOTTOM_RIGHT: |
| 607 | if (height < min_height) |
| 608 | bottom = top + min_height; |
| 609 | break; |
| 610 | |
| 611 | default: ; |
| 612 | } |
| 613 | } |
| 614 | else { |
| 615 | if (left < 0 || top < 0 || |
| 616 | right > pb_width || bottom > pb_height || |
| 617 | width < min_width || height < min_height) { |
| 618 | left = area->priv->crop.x; |
| 619 | right = area->priv->crop.x + area->priv->crop.width - 1; |
| 620 | top = area->priv->crop.y; |
| 621 | bottom = area->priv->crop.y + area->priv->crop.height - 1; |
| 622 | } |
| 623 | } |
| 624 | |
| 625 | area->priv->crop.x = left; |
| 626 | area->priv->crop.y = top; |
| 627 | area->priv->crop.width = right - left + 1; |
| 628 | area->priv->crop.height = bottom - top + 1; |
| 629 | |
| 630 | crop_to_widget (area, &damage); |
| 631 | gtk_widget_queue_draw_area (widget, |
| 632 | damage.x - 1, damage.y - 1, |
| 633 | damage.width + 2, damage.height + 2); |
| 634 | |
| 635 | return FALSE; |
| 636 | } |
| 637 | |
| 638 | static gboolean |
| 639 | cc_crop_area_button_press_event (GtkWidget *widget, |
| 640 | GdkEventButton *event) |
| 641 | { |
| 642 | CcCropArea *area = CC_CROP_AREA (widget); |
| 643 | GdkRectangle crop; |
| 644 | |
| 645 | if (area->priv->browse_pixbuf == NULL) |
| 646 | return FALSE; |
| 647 | |
| 648 | crop_to_widget (area, &crop); |
| 649 | |
| 650 | area->priv->last_press_x = (event->x - area->priv->image.x) / area->priv->scale; |
| 651 | area->priv->last_press_y = (event->y - area->priv->image.y) / area->priv->scale; |
| 652 | area->priv->active_region = find_location (&crop, event->x, event->y); |
| 653 | |
| 654 | gtk_widget_queue_draw_area (widget, |
| 655 | crop.x - 1, crop.y - 1, |
| 656 | crop.width + 2, crop.height + 2); |
| 657 | |
| 658 | return FALSE; |
| 659 | } |
| 660 | |
| 661 | static gboolean |
| 662 | cc_crop_area_button_release_event (GtkWidget *widget, |
| 663 | GdkEventButton *event) |
| 664 | { |
| 665 | CcCropArea *area = CC_CROP_AREA (widget); |
| 666 | GdkRectangle crop; |
| 667 | |
| 668 | if (area->priv->browse_pixbuf == NULL) |
| 669 | return FALSE; |
| 670 | |
| 671 | crop_to_widget (area, &crop); |
| 672 | |
| 673 | area->priv->last_press_x = -1; |
| 674 | area->priv->last_press_y = -1; |
| 675 | area->priv->active_region = OUTSIDE; |
| 676 | |
| 677 | gtk_widget_queue_draw_area (widget, |
| 678 | crop.x - 1, crop.y - 1, |
| 679 | crop.width + 2, crop.height + 2); |
| 680 | |
| 681 | return FALSE; |
| 682 | } |
| 683 | |
| 684 | static void |
| 685 | cc_crop_area_set_size_request (CcCropArea *area) |
| 686 | { |
| 687 | gtk_widget_set_size_request (GTK_WIDGET (area), |
| 688 | area->priv->base_width, |
| 689 | area->priv->base_height); |
| 690 | } |
| 691 | |
| 692 | static void |
| 693 | cc_crop_area_finalize (GObject *object) |
| 694 | { |
| 695 | CcCropArea *area = CC_CROP_AREA (object); |
| 696 | |
| 697 | if (area->priv->browse_pixbuf) { |
| 698 | g_object_unref (area->priv->browse_pixbuf); |
| 699 | area->priv->browse_pixbuf = NULL; |
| 700 | } |
| 701 | if (area->priv->pixbuf) { |
| 702 | g_object_unref (area->priv->pixbuf); |
| 703 | area->priv->pixbuf = NULL; |
| 704 | } |
| 705 | if (area->priv->color_shifted) { |
| 706 | g_object_unref (area->priv->color_shifted); |
| 707 | area->priv->color_shifted = NULL; |
| 708 | } |
| 709 | } |
| 710 | |
| 711 | static void |
| 712 | cc_crop_area_class_init (CcCropAreaClass *klass) |
| 713 | { |
| 714 | GObjectClass *object_class = G_OBJECT_CLASS (klass); |
| 715 | GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass); |
| 716 | |
| 717 | object_class->finalize = cc_crop_area_finalize; |
| 718 | widget_class->draw = cc_crop_area_draw; |
| 719 | widget_class->button_press_event = cc_crop_area_button_press_event; |
| 720 | widget_class->button_release_event = cc_crop_area_button_release_event; |
| 721 | widget_class->motion_notify_event = cc_crop_area_motion_notify_event; |
| 722 | |
| 723 | g_type_class_add_private (klass, sizeof (CcCropAreaPrivate)); |
| 724 | } |
| 725 | |
| 726 | static void |
| 727 | cc_crop_area_init (CcCropArea *area) |
| 728 | { |
| 729 | area->priv = (G_TYPE_INSTANCE_GET_PRIVATE ((area), CC_TYPE_CROP_AREA, |
| 730 | CcCropAreaPrivate)); |
| 731 | |
| 732 | gtk_widget_add_events (GTK_WIDGET (area), GDK_POINTER_MOTION_MASK | |
| 733 | GDK_BUTTON_PRESS_MASK | |
| 734 | GDK_BUTTON_RELEASE_MASK); |
| 735 | |
| 736 | area->priv->scale = 0.0; |
| 737 | area->priv->image.x = 0; |
| 738 | area->priv->image.y = 0; |
| 739 | area->priv->image.width = 0; |
| 740 | area->priv->image.height = 0; |
| 741 | area->priv->active_region = OUTSIDE; |
| 742 | area->priv->base_width = 48; |
| 743 | area->priv->base_height = 48; |
| 744 | area->priv->aspect = 1; |
| 745 | |
| 746 | cc_crop_area_set_size_request (area); |
| 747 | } |
| 748 | |
| 749 | GtkWidget * |
| 750 | cc_crop_area_new (void) |
| 751 | { |
| 752 | return g_object_new (CC_TYPE_CROP_AREA, NULL); |
| 753 | } |
| 754 | |
| 755 | GdkPixbuf * |
| 756 | cc_crop_area_get_picture (CcCropArea *area) |
| 757 | { |
| 758 | gint width, height; |
| 759 | |
| 760 | width = gdk_pixbuf_get_width (area->priv->browse_pixbuf); |
| 761 | height = gdk_pixbuf_get_height (area->priv->browse_pixbuf); |
| 762 | width = MIN (area->priv->crop.width, width - area->priv->crop.x); |
| 763 | height = MIN (area->priv->crop.height, height - area->priv->crop.y); |
| 764 | |
| 765 | return gdk_pixbuf_new_subpixbuf (area->priv->browse_pixbuf, |
| 766 | area->priv->crop.x, |
| 767 | area->priv->crop.y, |
| 768 | width, height); |
| 769 | } |
| 770 | |
| 771 | void |
| 772 | cc_crop_area_set_picture (CcCropArea *area, |
| 773 | GdkPixbuf *pixbuf) |
| 774 | { |
| 775 | int width; |
| 776 | int height; |
| 777 | |
| 778 | if (area->priv->browse_pixbuf) { |
| 779 | g_object_unref (area->priv->browse_pixbuf); |
| 780 | area->priv->browse_pixbuf = NULL; |
| 781 | } |
| 782 | if (pixbuf) { |
| 783 | area->priv->browse_pixbuf = g_object_ref (pixbuf); |
| 784 | width = gdk_pixbuf_get_width (pixbuf); |
| 785 | height = gdk_pixbuf_get_height (pixbuf); |
| 786 | } else { |
| 787 | width = 0; |
| 788 | height = 0; |
| 789 | } |
| 790 | |
| 791 | area->priv->crop.width = 2 * area->priv->base_width; |
| 792 | area->priv->crop.height = 2 * area->priv->base_height; |
| 793 | area->priv->crop.x = (width - area->priv->crop.width) / 2; |
| 794 | area->priv->crop.y = (height - area->priv->crop.height) / 2; |
| 795 | |
| 796 | area->priv->scale = 0.0; |
| 797 | area->priv->image.x = 0; |
| 798 | area->priv->image.y = 0; |
| 799 | area->priv->image.width = 0; |
| 800 | area->priv->image.height = 0; |
| 801 | |
| 802 | gtk_widget_queue_draw (GTK_WIDGET (area)); |
| 803 | } |
| 804 | |
| 805 | void |
| 806 | cc_crop_area_set_min_size (CcCropArea *area, |
| 807 | gint width, |
| 808 | gint height) |
| 809 | { |
| 810 | area->priv->base_width = width; |
| 811 | area->priv->base_height = height; |
| 812 | |
| 813 | cc_crop_area_set_size_request (area); |
| 814 | |
| 815 | if (area->priv->aspect > 0) { |
| 816 | area->priv->aspect = area->priv->base_width / (gdouble)area->priv->base_height; |
| 817 | } |
| 818 | } |
| 819 | |
| 820 | void |
| 821 | cc_crop_area_set_constrain_aspect (CcCropArea *area, |
| 822 | gboolean constrain) |
| 823 | { |
| 824 | if (constrain) { |
| 825 | area->priv->aspect = area->priv->base_width / (gdouble)area->priv->base_height; |
| 826 | } |
| 827 | else { |
| 828 | area->priv->aspect = -1; |
| 829 | } |
| 830 | } |