diff options
Diffstat (limited to 'plug-ins/imagemap/imap_preview.c')
| -rw-r--r-- | plug-ins/imagemap/imap_preview.c | 402 |
1 files changed, 402 insertions, 0 deletions
diff --git a/plug-ins/imagemap/imap_preview.c b/plug-ins/imagemap/imap_preview.c new file mode 100644 index 0000000..160a88d --- /dev/null +++ b/plug-ins/imagemap/imap_preview.c @@ -0,0 +1,402 @@ +/* + * This is a plug-in for GIMP. + * + * Generates clickable image maps. + * + * Copyright (C) 1998-2005 Maurits Rijk m.rijk@chello.nl + * + * 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 3 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <https://www.gnu.org/licenses/>. + * + */ + +#include "config.h" + +#include <libgimp/gimp.h> +#include <libgimp/gimpui.h> + +#include "imap_commands.h" +#include "imap_grid.h" +#include "imap_main.h" +#include "imap_menu.h" +#include "imap_preview.h" + +#define PREVIEW_MASK (GDK_EXPOSURE_MASK | \ + GDK_POINTER_MOTION_MASK | \ + GDK_BUTTON_PRESS_MASK | \ + GDK_BUTTON_RELEASE_MASK | \ + GDK_BUTTON_MOTION_MASK | \ + GDK_KEY_PRESS_MASK | \ + GDK_KEY_RELEASE_MASK | \ + GDK_ENTER_NOTIFY_MASK | \ + GDK_LEAVE_NOTIFY_MASK) + +#define PREVIEW_SIZE 400 + +/*====================================================================== + Preview Rendering Util routine +=======================================================================*/ + +#define CHECKWIDTH 4 +#define LIGHTCHECK 192 +#define DARKCHECK 128 +#ifndef OPAQUE +#define OPAQUE 255 +#endif + +static Object_t *_tmp_obj; + +static Preview_t* +preview_user_data(GtkWidget *preview) +{ + return (Preview_t*) g_object_get_data (G_OBJECT (preview), "preview"); +} + +gint +preview_get_width(GtkWidget *preview) +{ + return preview_user_data(preview)->width; +} + +gint +preview_get_height(GtkWidget *preview) +{ + return preview_user_data(preview)->height; +} + +static void +render_background(Preview_t *preview_base) +{ + GtkWidget *preview = preview_base->preview; + GtkStyle *style; + const GdkColor *bg_color; + + gtk_widget_ensure_style (preview); + + style = gtk_widget_get_style (preview); + bg_color = &style->bg[GTK_STATE_NORMAL]; + + gimp_preview_area_fill (GIMP_PREVIEW_AREA (preview), + 0, 0, G_MAXINT, G_MAXINT, + bg_color->red >> 8, + bg_color->green >> 8, + bg_color->blue >> 8); +} + +static void +render_rgb_image (Preview_t *preview_base, + gint32 drawable_id) +{ + GeglBuffer *buffer; + guchar *dest_buffer; + gint dwidth, dheight, pwidth, pheight; + GtkWidget *preview = preview_base->preview; + + dwidth = gimp_drawable_width (drawable_id); + dheight = gimp_drawable_height (drawable_id); + pwidth = preview_base->widget_width; + pheight = preview_base->widget_height; + + dest_buffer = g_new (guchar, pwidth * pheight * 4); + + buffer = gimp_drawable_get_buffer (drawable_id); + + gegl_buffer_get (buffer, GEGL_RECTANGLE (0, 0, pwidth, pheight), + MIN ((gdouble) pwidth / (gdouble) dwidth, + (gdouble) pheight / (gdouble) dheight), + babl_format ("R'G'B'A u8"), dest_buffer, + GEGL_AUTO_ROWSTRIDE, GEGL_ABYSS_NONE); + + g_object_unref (buffer); + + gimp_preview_area_draw (GIMP_PREVIEW_AREA (preview), + 0, 0, pwidth, pheight, + GIMP_RGBA_IMAGE, + dest_buffer, + pwidth * 4); + + g_free (dest_buffer); +} + +static void +render_preview (Preview_t *preview_base, + gint32 drawable_id) +{ + render_background (preview_base); + render_rgb_image (preview_base, drawable_id); +} + +static gboolean +arrow_cb(GtkWidget *widget, GdkEventButton *event, gpointer data) +{ + if (event->button == 1) + do_main_popup_menu(event); + return TRUE; +} + +static gboolean +preview_expose(GtkWidget *widget, GdkEventExpose *event) +{ + cairo_t *cr; + gint width = preview_get_width (widget); + gint height = preview_get_height (widget); + + cr = gdk_cairo_create (event->window); + gdk_cairo_region (cr, event->region); + cairo_clip (cr); + cairo_set_line_width (cr, 1.); + draw_grid (cr, width, height); + + draw_shapes (cr); + + if (_tmp_obj) + { + /* this is a bit of a hack */ + gdouble dash = 4.; + _tmp_obj->selected |= 4; + cairo_set_source_rgb (cr, 1., 0., 1.); + cairo_set_dash (cr, &dash, 1, dash); + object_draw (_tmp_obj, cr); + } + + cairo_destroy (cr); + return FALSE; +} + +void +preview_set_tmp_obj (Object_t *obj) +{ + _tmp_obj = obj; +} + +void +preview_unset_tmp_obj (Object_t *obj) +{ + if (_tmp_obj == obj) _tmp_obj = NULL; +} + +void +preview_zoom(Preview_t *preview, gint zoom_factor) +{ + preview->widget_width = preview->width * zoom_factor; + preview->widget_height = preview->height * zoom_factor; + gtk_widget_set_size_request (preview->preview, preview->widget_width, + preview->widget_height); + gtk_widget_queue_resize(preview->window); + render_preview(preview, preview->drawable_id); + preview_redraw(); +} + +GdkCursorType +preview_set_cursor(Preview_t *preview, GdkCursorType cursor_type) +{ + GdkCursorType prev_cursor = preview->cursor; + GdkDisplay *display = gtk_widget_get_display (preview->window); + GdkCursor *cursor = gdk_cursor_new_for_display (display, + cursor_type); + + gdk_window_set_cursor(gtk_widget_get_window (preview->window), cursor); + gdk_cursor_unref(cursor); + + preview->cursor = cursor_type; + + return prev_cursor; +} + +static const GtkTargetEntry target_table[] = +{ + {"STRING", 0, 1 }, + {"text/plain", 0, 2 } +}; + +static void +handle_drop(GtkWidget *widget, GdkDragContext *context, gint x, gint y, + GtkSelectionData *data, guint info, guint time) +{ + gboolean success = FALSE; + + if (gtk_selection_data_get_length (data) >= 0 && + gtk_selection_data_get_format (data) == 8) + { + ObjectList_t *list = get_shapes(); + Object_t *obj; + + x = get_real_coord(x); + y = get_real_coord(y); + obj = object_list_find(list, x, y); + if (obj && !obj->locked) + { + command_list_add(edit_object_command_new(obj)); + object_set_url(obj, (const gchar *) gtk_selection_data_get_data (data)); + object_emit_update_signal(obj); + success = TRUE; + } + } + gtk_drag_finish(context, success, FALSE, time); +} + +static void +preview_size_allocate (GtkWidget *widget, + GtkAllocation *allocation, + gpointer preview_void) +{ + Preview_t *preview = preview_void; + + render_preview (preview, preview->drawable_id); +} + +static void +scroll_adj_changed (GtkAdjustment *adj, + GimpRuler *ruler) +{ + gimp_ruler_set_range (ruler, + gtk_adjustment_get_value (adj), + gtk_adjustment_get_value (adj) + + gtk_adjustment_get_page_size (adj), + gtk_adjustment_get_upper (adj)); +} + +Preview_t * +make_preview (gint32 drawable_id) +{ + Preview_t *data = g_new(Preview_t, 1); + GtkAdjustment *hadj; + GtkAdjustment *vadj; + GtkWidget *preview; + GtkWidget *window; + GtkWidget *viewport; + GtkWidget *button, *arrow; + GtkWidget *ruler; + GtkWidget *table; + GtkWidget *scrollbar; + gint width, height; + + data->drawable_id = drawable_id; + data->preview = preview = gimp_preview_area_new (); + + g_object_set_data (G_OBJECT (preview), "preview", data); + gtk_widget_set_events (GTK_WIDGET (preview), PREVIEW_MASK); + + g_signal_connect_after (preview, "expose-event", + G_CALLBACK (preview_expose), + data); + g_signal_connect (preview, "size-allocate", + G_CALLBACK (preview_size_allocate), + data); + + /* Handle drop of links in preview widget */ + gtk_drag_dest_set (preview, GTK_DEST_DEFAULT_ALL, target_table, + 2, GDK_ACTION_COPY); + + g_signal_connect (preview, "drag-data-received", + G_CALLBACK (handle_drop), + NULL); + + data->widget_width = data->width = gimp_drawable_width (drawable_id); + data->widget_height = data->height = gimp_drawable_height (drawable_id); + gtk_widget_set_size_request (preview, data->widget_width, + data->widget_height); + + /* The main table */ + data->window = table = gtk_table_new (3, 3, FALSE); + gtk_table_set_col_spacings (GTK_TABLE (table), 1); + gtk_table_set_row_spacings (GTK_TABLE (table), 1); + + /* Create button with arrow */ + button = gtk_button_new (); + gtk_widget_set_can_focus (button, FALSE); + gtk_table_attach (GTK_TABLE (table), button, 0, 1, 0, 1, + GTK_FILL, GTK_FILL, 0, 0); + gtk_widget_set_events (button, + GDK_BUTTON_PRESS_MASK | GDK_BUTTON_RELEASE_MASK); + gtk_widget_show (button); + + g_signal_connect (button, "button-press-event", + G_CALLBACK (arrow_cb), + NULL); + + arrow = gtk_arrow_new (GTK_ARROW_RIGHT, GTK_SHADOW_OUT); + gtk_container_add (GTK_CONTAINER (button), arrow); + gtk_widget_show (arrow); + + /* Create horizontal ruler */ + data->hruler = ruler = gimp_ruler_new (GTK_ORIENTATION_HORIZONTAL); + g_signal_connect_swapped (preview, "motion-notify-event", + G_CALLBACK (GTK_WIDGET_GET_CLASS (ruler)->motion_notify_event), + ruler); + + gtk_table_attach (GTK_TABLE (table), ruler, 1, 2, 0, 1, + GTK_EXPAND | GTK_SHRINK | GTK_FILL, GTK_FILL, 0, 0); + gtk_widget_show (ruler); + + /* Create vertical ruler */ + data->vruler = ruler = gimp_ruler_new (GTK_ORIENTATION_VERTICAL); + g_signal_connect_swapped (preview, "motion-notify-event", + G_CALLBACK (GTK_WIDGET_GET_CLASS (ruler)->motion_notify_event), + ruler); + gtk_table_attach (GTK_TABLE (table), ruler, 0, 1, 1, 2, + GTK_FILL, GTK_EXPAND | GTK_SHRINK | GTK_FILL, 0, 0); + gtk_widget_show (ruler); + + window = gtk_scrolled_window_new (NULL, NULL); + gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (window), + GTK_POLICY_NEVER, GTK_POLICY_NEVER); + width = (data->width > 600) ? 600 : data->width; + height = (data->height > 400) ? 400 : data->height; + gtk_widget_set_size_request (window, width, height); + gtk_table_attach (GTK_TABLE (table), window, 1, 2, 1, 2, + GTK_FILL, GTK_FILL, 0, 0); + gtk_widget_show (window); + + viewport = gtk_viewport_new (NULL, NULL); + gtk_container_add (GTK_CONTAINER (window), viewport); + gtk_widget_show (viewport); + + hadj = gtk_scrolled_window_get_hadjustment (GTK_SCROLLED_WINDOW (window)); + + g_signal_connect (hadj, "changed", + G_CALLBACK (scroll_adj_changed), + data->hruler); + g_signal_connect (hadj, "value-changed", + G_CALLBACK (scroll_adj_changed), + data->hruler); + + vadj = gtk_scrolled_window_get_vadjustment (GTK_SCROLLED_WINDOW (window)); + + g_signal_connect (vadj, "changed", + G_CALLBACK (scroll_adj_changed), + data->vruler); + g_signal_connect (vadj, "value-changed", + G_CALLBACK (scroll_adj_changed), + data->vruler); + + gtk_container_add (GTK_CONTAINER (viewport), preview); + + scrollbar = gtk_scrollbar_new (GTK_ORIENTATION_HORIZONTAL, hadj); + gtk_table_attach(GTK_TABLE(table), scrollbar, 1, 2, 2, 3, + GTK_FILL | GTK_SHRINK, GTK_FILL | GTK_SHRINK, 0, 0); + gtk_widget_show (scrollbar); + + scrollbar = gtk_scrollbar_new (GTK_ORIENTATION_VERTICAL, vadj); + gtk_table_attach (GTK_TABLE (table), scrollbar, 2, 3, 1, 2, + GTK_FILL | GTK_SHRINK, GTK_FILL | GTK_SHRINK, 0, 0); + gtk_widget_show (scrollbar); + + gtk_widget_show (preview); + + render_preview (data, drawable_id); + + gtk_widget_show (table); + + return data; +} |