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main.c
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3193 lines (2754 loc) · 110 KB
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/*
g3data2 : A program for grabbing data from scanned graphs
Copyright (C) 2011 Jonas Frantz
This file is part of g3data2.
g3data2 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 2 of the License, or
(at your option) any later version.
g3data2 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, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
Authors email : jonas@frantz.fi
*/
#include <gtk/gtk.h> /* Include gtk library */
#include <stdio.h> /* Include stdio library */
#include <gdk/gdkkeysyms.h>
#include <stdlib.h> /* Include stdlib library */
#include <string.h> /* Include string library */
#include <math.h>
#include <glib/gstdio.h>
#include <libgen.h>
#include "main.h" /* Include predefined variables */
#include "strings.h" /* Include strings */
#include "vardefs.h"
#ifdef NOSPACING
#define SECT_SEP 0
#define GROUP_SEP 0
#define ELEM_SEP 0
#define FRAME_INDENT 0
#define WINDOW_BORDER 0
#else
#define SECT_SEP 12
#define GROUP_SEP 12
#define ELEM_SEP 6
#define FRAME_INDENT 18
#define WINDOW_BORDER 12
#endif
// This is the name we will attach the data structure to the container with
static const char *DATA_STORE_NAME = "tabdatastruct";
static const gdouble MAIN_IMAGE_MIN_ZOOM = 0.05;
static const gdouble MAIN_IMAGE_MAX_ZOOM = 8.0;
static const gdouble MAIN_IMAGE_ZOOM_STEP = 1.25;
static const gdouble ZOOM_AREA_VIEW_MULTIPLIER = 2.0;
static const gdouble MAIN_IMAGE_CANVAS_MIN_PAD = 512.0;
static const gint MAX_RECENT_FILES = 6;
static const gint START_TILE_THUMB_W = 160;
static const gint START_TILE_THUMB_H = 120;
static const gint START_TILE_COLUMNS = 3;
static const gint START_TILE_MIN_ITEM_W = 150;
static const gint START_TILE_MAX_ITEM_W = 220;
static const char *RECENT_GROUP = "RecentFiles";
static const char *RECENT_PATH_KEY_FMT = "path_%d";
static const char *RECENT_DATE_KEY_FMT = "date_%d";
static const char *DROPPED_URI_DELIMITER = "\r\n";
#ifdef G3DATA2_DEBUG
#define G3DBG(...) g_printerr("[g3data2][debug] " __VA_ARGS__)
#else
#define G3DBG(...) ((void) 0)
#endif
static void setButtonSensitivity(struct TabData *tabData);
static void triggerUpdateDrawArea(GtkWidget *area);
gint setupNewTab(char *filename, gdouble Scale, gdouble maxX,
gdouble maxY, gboolean UsePreSetCoords, gdouble *TempCoords,
gboolean *Uselogxy, gboolean *UseError);
// Declaration of gtk variables
GtkWidget *window;
GtkWidget *mainnotebook;
GtkWidget *close_menu_item;
GtkWidget *file_menu_widget;
GtkWidget *start_page_widget;
GtkWidget *start_icon_view_widget;
struct RecentFileEntry {
gchar *path;
gchar *date;
};
GPtrArray *recent_files;
GPtrArray *recent_menu_items;
// Declaration of global variables
gboolean MovePointMode = FALSE;
gboolean HideLog = FALSE, HideZoomArea = FALSE, HideOpProp = FALSE;
// Declaration of extern functions
extern void drawMarker(cairo_t *cr, gint x, gint y, gint type);
extern struct PointValue calculatePointValue(gdouble Xpos, gdouble Ypos,
struct TabData *tabData);
extern void outputResultset(GtkWidget *widget, gpointer func_data);
static void debugDumpViewportState(const char *tag, struct TabData *tabData) {
#ifdef G3DATA2_DEBUG
GtkAdjustment *hadj, *vadj;
gdouble hVal, hLower, hUpper, hPage;
gdouble vVal, vLower, vUpper, vPage;
gint vpW, vpH, daW, daH;
if (tabData == NULL || tabData->ViewPort == NULL) {
G3DBG("%s: tab/viewport not ready\n", tag);
return;
}
hadj = gtk_scrollable_get_hadjustment(GTK_SCROLLABLE(tabData->ViewPort));
vadj = gtk_scrollable_get_vadjustment(GTK_SCROLLABLE(tabData->ViewPort));
hVal = gtk_adjustment_get_value(hadj);
hLower = gtk_adjustment_get_lower(hadj);
hUpper = gtk_adjustment_get_upper(hadj);
hPage = gtk_adjustment_get_page_size(hadj);
vVal = gtk_adjustment_get_value(vadj);
vLower = gtk_adjustment_get_lower(vadj);
vUpper = gtk_adjustment_get_upper(vadj);
vPage = gtk_adjustment_get_page_size(vadj);
vpW = gtk_widget_get_allocated_width(tabData->ViewPort);
vpH = gtk_widget_get_allocated_height(tabData->ViewPort);
daW = tabData->drawing_area != NULL ?
gtk_widget_get_allocated_width(tabData->drawing_area) : -1;
daH = tabData->drawing_area != NULL ?
gtk_widget_get_allocated_height(tabData->drawing_area) : -1;
G3DBG(
"%s: vp_alloc=%dx%d da_alloc=%dx%d hadj[v=%.2f lo=%.2f up=%.2f page=%.2f] vadj[v=%.2f lo=%.2f up=%.2f page=%.2f] zoom=%.6f origin=(%.2f,%.2f) canvas=(%.2f,%.2f) image=%dx%d pending_fit=%d\n",
tag, vpW, vpH, daW, daH, hVal, hLower, hUpper, hPage, vVal, vLower, vUpper,
vPage, tabData->viewZoom, tabData->viewOrigin[0], tabData->viewOrigin[1],
tabData->viewCanvasSize[0], tabData->viewCanvasSize[1], tabData->XSize,
tabData->YSize, tabData->pendingInitialZoomToFit);
#else
(void) tag;
(void) tabData;
#endif
}
/****************************************************************/
/* This function closes the window when the application is */
/* killed. */
/****************************************************************/
gint closeApplicationHandler(GtkWidget *widget, GdkEvent *event, gpointer data) {
gtk_main_quit(); /* Quit gtk */
return FALSE;
}
static void freeRecentFileEntry(gpointer data) {
struct RecentFileEntry *entry;
entry = (struct RecentFileEntry *) data;
if (entry == NULL)
return;
g_free(entry->path);
g_free(entry->date);
g_free(entry);
}
static gchar *getRecentFilesPath(void) {
return g_build_filename(g_get_user_config_dir(), "g3data3",
"recent-files.ini", NULL);
}
static gchar *getNowIsoTimestamp(void) {
GDateTime *dt;
gchar *stamp;
dt = g_date_time_new_now_local();
stamp = g_date_time_format(dt, "%Y-%m-%dT%H:%M:%S%z");
g_date_time_unref(dt);
return stamp;
}
static gint getMenuItemIndex(GtkWidget *menu, GtkWidget *item) {
GList *children, *iter;
gint idx;
children = gtk_container_get_children(GTK_CONTAINER(menu));
idx = 0;
for (iter = children; iter != NULL; iter = iter->next, idx++) {
if (iter->data == item) {
g_list_free(children);
return idx;
}
}
g_list_free(children);
return -1;
}
static void clearRecentFileMenuItems(void) {
guint i;
if (recent_menu_items == NULL || file_menu_widget == NULL)
return;
for (i = 0; i < recent_menu_items->len; i++) {
GtkWidget *item;
item = (GtkWidget *) g_ptr_array_index(recent_menu_items, i);
gtk_container_remove(GTK_CONTAINER(file_menu_widget), item);
}
g_ptr_array_set_size(recent_menu_items, 0);
}
static gint countDataTabs(void) {
gint i, count;
count = 0;
if (mainnotebook == NULL)
return 0;
for (i = 0; i < gtk_notebook_get_n_pages(GTK_NOTEBOOK(mainnotebook)); i++) {
GtkWidget *page;
page = gtk_notebook_get_nth_page(GTK_NOTEBOOK(mainnotebook), i);
if (g_object_get_data(G_OBJECT(page), DATA_STORE_NAME) != NULL)
count++;
}
return count;
}
static void hideStartPage(void) {
GtkWidget *parent;
if (start_page_widget == NULL)
return;
parent = gtk_widget_get_parent(start_page_widget);
if (parent != NULL)
gtk_container_remove(GTK_CONTAINER(parent), start_page_widget);
start_page_widget = NULL;
start_icon_view_widget = NULL;
if (mainnotebook != NULL)
gtk_widget_show(mainnotebook);
}
static void openRecentPath(const gchar *path) {
if (path == NULL || *path == '\0')
return;
setupNewTab((char *) path, 1.0, -1, -1, FALSE, NULL, NULL, NULL);
}
static void updateStartIconViewLayout(GtkWidget *icon_view, gint host_width) {
gint available_w, columns, item_w;
const gint spacing = 10;
const gint margin = 6;
if (icon_view == NULL || host_width <= 1)
return;
available_w = host_width - 2 * margin;
if (available_w <= START_TILE_MIN_ITEM_W) {
columns = 1;
} else {
columns = available_w / START_TILE_MIN_ITEM_W;
if (columns < 1)
columns = 1;
if (columns > START_TILE_COLUMNS)
columns = START_TILE_COLUMNS;
}
item_w = (available_w - (columns - 1) * spacing) / columns;
if (item_w < START_TILE_MIN_ITEM_W)
item_w = START_TILE_MIN_ITEM_W;
if (item_w > START_TILE_MAX_ITEM_W)
item_w = START_TILE_MAX_ITEM_W;
gtk_icon_view_set_columns(GTK_ICON_VIEW(icon_view), columns);
gtk_icon_view_set_item_width(GTK_ICON_VIEW(icon_view), item_w);
gtk_widget_queue_resize(icon_view);
gtk_widget_queue_draw(icon_view);
}
static void startIconViewSizeAllocateEvent(GtkWidget *widget,
GtkAllocation *allocation, gpointer data) {
(void) data;
updateStartIconViewLayout(widget, allocation->width);
}
static void startIconHostSizeAllocateEvent(GtkWidget *widget,
GtkAllocation *allocation, gpointer data) {
GtkWidget *icon_view;
GtkAdjustment *hadj, *vadj;
(void) widget;
icon_view = GTK_WIDGET(data);
hadj = gtk_scrolled_window_get_hadjustment(GTK_SCROLLED_WINDOW(widget));
vadj = gtk_scrolled_window_get_vadjustment(GTK_SCROLLED_WINDOW(widget));
if (hadj != NULL)
gtk_adjustment_set_value(hadj, gtk_adjustment_get_lower(hadj));
if (vadj != NULL)
gtk_adjustment_set_value(vadj, gtk_adjustment_get_lower(vadj));
updateStartIconViewLayout(icon_view, allocation->width);
gtk_widget_queue_draw(widget);
gtk_widget_queue_draw(icon_view);
}
enum StartIconColumns {
START_ICON_COL_PIXBUF = 0, START_ICON_COL_NAME, START_ICON_COL_PATH,
START_ICON_COL_TOOLTIP, START_ICON_COL_COUNT
};
static void startIconItemActivated(GtkIconView *icon_view, GtkTreePath *path,
gpointer data) {
GtkTreeModel *model;
GtkTreeIter iter;
gchar *full_path;
(void) data;
model = gtk_icon_view_get_model(icon_view);
if (model == NULL || !gtk_tree_model_get_iter(model, &iter, path))
return;
gtk_tree_model_get(model, &iter, START_ICON_COL_PATH, &full_path, -1);
openRecentPath(full_path);
g_free(full_path);
}
static void showStartPageIfNeeded(void) {
GtkWidget *outer, *scrolled, *icon_view, *parent;
GtkListStore *store;
GtkIconTheme *theme;
gint i;
if (mainnotebook == NULL)
return;
if (countDataTabs() > 0) {
hideStartPage();
gtk_widget_show(mainnotebook);
return;
}
hideStartPage();
parent = gtk_widget_get_parent(mainnotebook);
if (parent == NULL)
return;
outer = gtk_box_new(GTK_ORIENTATION_VERTICAL, 0);
gtk_container_set_border_width(GTK_CONTAINER(outer), 0);
gtk_widget_set_hexpand(outer, TRUE);
gtk_widget_set_vexpand(outer, TRUE);
gtk_widget_set_halign(outer, GTK_ALIGN_FILL);
gtk_widget_set_valign(outer, GTK_ALIGN_FILL);
scrolled = gtk_scrolled_window_new(NULL, NULL);
gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(scrolled),
GTK_POLICY_AUTOMATIC, GTK_POLICY_AUTOMATIC);
gtk_widget_set_hexpand(scrolled, TRUE);
gtk_widget_set_vexpand(scrolled, TRUE);
gtk_widget_set_halign(scrolled, GTK_ALIGN_FILL);
gtk_widget_set_valign(scrolled, GTK_ALIGN_FILL);
gtk_box_pack_start(GTK_BOX(outer), scrolled, TRUE, TRUE, 0);
store = gtk_list_store_new(START_ICON_COL_COUNT, GDK_TYPE_PIXBUF, G_TYPE_STRING,
G_TYPE_STRING, G_TYPE_STRING);
theme = gtk_icon_theme_get_default();
for (i = 0; recent_files != NULL && i < (gint) recent_files->len; i++) {
struct RecentFileEntry *entry;
GdkPixbuf *pixbuf;
GtkTreeIter iter;
gchar *base;
GError *pix_err;
entry = (struct RecentFileEntry *) g_ptr_array_index(recent_files, i);
pix_err = NULL;
pixbuf = gdk_pixbuf_new_from_file_at_scale(entry->path, START_TILE_THUMB_W,
START_TILE_THUMB_H, TRUE, &pix_err);
if (pixbuf == NULL) {
if (pix_err != NULL)
g_error_free(pix_err);
pixbuf = gtk_icon_theme_load_icon(theme, "image-missing", 64, 0, NULL);
}
base = g_path_get_basename(entry->path);
gtk_list_store_append(store, &iter);
gtk_list_store_set(store, &iter, START_ICON_COL_PIXBUF, pixbuf,
START_ICON_COL_NAME, base, START_ICON_COL_PATH, entry->path,
START_ICON_COL_TOOLTIP, entry->path, -1);
if (pixbuf != NULL)
g_object_unref(pixbuf);
g_free(base);
}
icon_view = gtk_icon_view_new_with_model(GTK_TREE_MODEL(store));
gtk_icon_view_set_pixbuf_column(GTK_ICON_VIEW(icon_view), START_ICON_COL_PIXBUF);
gtk_icon_view_set_text_column(GTK_ICON_VIEW(icon_view), START_ICON_COL_NAME);
gtk_icon_view_set_tooltip_column(GTK_ICON_VIEW(icon_view),
START_ICON_COL_TOOLTIP);
gtk_icon_view_set_activate_on_single_click(GTK_ICON_VIEW(icon_view), TRUE);
gtk_icon_view_set_columns(GTK_ICON_VIEW(icon_view), START_TILE_COLUMNS);
gtk_icon_view_set_margin(GTK_ICON_VIEW(icon_view), 6);
gtk_icon_view_set_row_spacing(GTK_ICON_VIEW(icon_view), 10);
gtk_icon_view_set_column_spacing(GTK_ICON_VIEW(icon_view), 10);
gtk_widget_set_hexpand(icon_view, TRUE);
gtk_widget_set_vexpand(icon_view, TRUE);
gtk_widget_set_halign(icon_view, GTK_ALIGN_FILL);
gtk_widget_set_valign(icon_view, GTK_ALIGN_START);
g_signal_connect(G_OBJECT(icon_view), "size-allocate",
G_CALLBACK(startIconViewSizeAllocateEvent), NULL);
g_signal_connect(G_OBJECT(scrolled), "size-allocate",
G_CALLBACK(startIconHostSizeAllocateEvent), icon_view);
g_signal_connect(G_OBJECT(icon_view), "item-activated",
G_CALLBACK(startIconItemActivated), NULL);
g_object_unref(store);
gtk_container_add(GTK_CONTAINER(scrolled), icon_view);
if (recent_files == NULL || recent_files->len == 0)
gtk_widget_set_sensitive(icon_view, FALSE);
start_page_widget = outer;
start_icon_view_widget = icon_view;
gtk_box_pack_start(GTK_BOX(parent), start_page_widget, TRUE, TRUE, 0);
gtk_widget_show_all(start_page_widget);
gtk_widget_hide(mainnotebook);
gtk_widget_set_sensitive(close_menu_item, FALSE);
gtk_window_set_title(GTK_WINDOW(window), Window_Title_NoneOpen);
}
static gint windowConfigureEvent(GtkWidget *widget, GdkEvent *event, gpointer data) {
gint host_w;
(void) widget;
(void) event;
(void) data;
if (countDataTabs() == 0)
showStartPageIfNeeded();
if (start_page_widget == NULL || start_icon_view_widget == NULL)
return FALSE;
/* Keep notebook hidden whenever the standalone start page is active. */
gtk_widget_hide(mainnotebook);
gtk_widget_show_all(start_page_widget);
host_w = gtk_widget_get_allocated_width(start_page_widget);
updateStartIconViewLayout(start_icon_view_widget, host_w);
gtk_widget_queue_draw(start_page_widget);
gtk_widget_queue_draw(start_icon_view_widget);
return FALSE;
}
static void saveRecentFiles(void) {
GKeyFile *kf;
gchar *path, *dirpath;
gchar *out;
gsize out_len;
guint i;
gchar keybuf[32];
if (recent_files == NULL)
return;
kf = g_key_file_new();
for (i = 0; i < recent_files->len && i < (guint) MAX_RECENT_FILES; i++) {
struct RecentFileEntry *entry;
entry = (struct RecentFileEntry *) g_ptr_array_index(recent_files, i);
snprintf(keybuf, sizeof(keybuf), RECENT_PATH_KEY_FMT, (int) i);
g_key_file_set_string(kf, RECENT_GROUP, keybuf, entry->path);
snprintf(keybuf, sizeof(keybuf), RECENT_DATE_KEY_FMT, (int) i);
g_key_file_set_string(kf, RECENT_GROUP, keybuf, entry->date);
}
out = g_key_file_to_data(kf, &out_len, NULL);
path = getRecentFilesPath();
dirpath = g_path_get_dirname(path);
g_mkdir_with_parents(dirpath, 0755);
g_file_set_contents(path, out, out_len, NULL);
g_free(dirpath);
g_free(path);
g_free(out);
g_key_file_unref(kf);
}
void recentFileActivate(GtkWidget *widget, gpointer data) {
const gchar *path;
(void) data;
path = (const gchar *) g_object_get_data(G_OBJECT(widget), "recent-path");
openRecentPath(path);
}
static void rebuildRecentFileMenu(void) {
gint insert_at;
guint i;
if (file_menu_widget == NULL || close_menu_item == NULL || recent_files == NULL)
return;
clearRecentFileMenuItems();
insert_at = getMenuItemIndex(file_menu_widget, close_menu_item);
if (insert_at < 0)
return;
if (recent_files->len == 0) {
GtkWidget *empty_item;
empty_item = gtk_menu_item_new_with_label("(No recent files)");
gtk_widget_set_sensitive(empty_item, FALSE);
gtk_menu_shell_insert(GTK_MENU_SHELL(file_menu_widget), empty_item,
insert_at);
g_ptr_array_add(recent_menu_items, empty_item);
showStartPageIfNeeded();
return;
}
for (i = 0; i < recent_files->len; i++) {
struct RecentFileEntry *entry;
GtkWidget *item;
gchar *base;
gchar *label;
entry = (struct RecentFileEntry *) g_ptr_array_index(recent_files, i);
base = g_path_get_basename(entry->path);
label = g_strdup_printf("%s (%s)", base, entry->date);
item = gtk_menu_item_new_with_label(label);
g_object_set_data_full(G_OBJECT(item), "recent-path",
g_strdup(entry->path), g_free);
gtk_widget_set_tooltip_text(item, entry->path);
g_signal_connect(G_OBJECT(item), "activate",
G_CALLBACK(recentFileActivate), NULL);
gtk_menu_shell_insert(GTK_MENU_SHELL(file_menu_widget), item, insert_at + i);
g_ptr_array_add(recent_menu_items, item);
g_free(label);
g_free(base);
}
showStartPageIfNeeded();
}
static void loadRecentFiles(void) {
GKeyFile *kf;
gchar *path;
guint i;
gchar keybuf[32];
GError *err;
if (recent_files == NULL)
recent_files = g_ptr_array_new_with_free_func(freeRecentFileEntry);
else
g_ptr_array_set_size(recent_files, 0);
kf = g_key_file_new();
path = getRecentFilesPath();
err = NULL;
if (!g_key_file_load_from_file(kf, path, G_KEY_FILE_NONE, &err)) {
if (err != NULL)
g_error_free(err);
g_free(path);
g_key_file_unref(kf);
return;
}
for (i = 0; i < (guint) MAX_RECENT_FILES; i++) {
gchar *p, *d;
struct RecentFileEntry *entry;
snprintf(keybuf, sizeof(keybuf), RECENT_PATH_KEY_FMT, (int) i);
p = g_key_file_get_string(kf, RECENT_GROUP, keybuf, NULL);
if (p == NULL || *p == '\0') {
g_free(p);
continue;
}
snprintf(keybuf, sizeof(keybuf), RECENT_DATE_KEY_FMT, (int) i);
d = g_key_file_get_string(kf, RECENT_GROUP, keybuf, NULL);
if (d == NULL || *d == '\0') {
g_free(d);
d = g_strdup("");
}
entry = g_new0(struct RecentFileEntry, 1);
entry->path = p;
entry->date = d;
g_ptr_array_add(recent_files, entry);
}
g_free(path);
g_key_file_unref(kf);
}
static void addRecentFile(const gchar *filename) {
gchar *canon;
gchar *now;
guint i;
struct RecentFileEntry *entry;
if (filename == NULL || *filename == '\0')
return;
if (recent_files == NULL)
recent_files = g_ptr_array_new_with_free_func(freeRecentFileEntry);
canon = g_canonicalize_filename(filename, NULL);
for (i = 0; i < recent_files->len; i++) {
struct RecentFileEntry *cur;
cur = (struct RecentFileEntry *) g_ptr_array_index(recent_files, i);
if (g_strcmp0(cur->path, canon) == 0) {
g_ptr_array_remove_index(recent_files, i);
break;
}
}
now = getNowIsoTimestamp();
entry = g_new0(struct RecentFileEntry, 1);
entry->path = canon;
entry->date = now;
g_ptr_array_insert(recent_files, 0, entry);
while (recent_files->len > (guint) MAX_RECENT_FILES)
g_ptr_array_remove_index(recent_files, recent_files->len - 1);
saveRecentFiles();
rebuildRecentFileMenu();
}
gboolean updateZoomArea(GtkWidget *widget, cairo_t *cr, gpointer data) {
cairo_t *first_cr;
cairo_surface_t *first;
struct TabData *tabData;
gdouble zoomAreaScale;
tabData = (struct TabData *) data;
if (tabData->mousePointerCoords[0] >= 0 && tabData->mousePointerCoords[1] >= 0) {
zoomAreaScale = tabData->viewZoom * ZOOM_AREA_VIEW_MULTIPLIER;
if (zoomAreaScale <= 0.0)
zoomAreaScale = ZOOM_AREA_VIEW_MULTIPLIER;
first = cairo_surface_create_similar(cairo_get_target(cr),
CAIRO_CONTENT_COLOR, ZOOMPIXSIZE, ZOOMPIXSIZE);
first_cr = cairo_create(first);
cairo_scale(first_cr, zoomAreaScale, zoomAreaScale);
cairo_set_source_surface(
first_cr,
tabData->image,
-tabData->mousePointerCoords[0]
+ ZOOMPIXSIZE / (2 * zoomAreaScale),
-tabData->mousePointerCoords[1]
+ ZOOMPIXSIZE / (2 * zoomAreaScale));
cairo_paint(first_cr);
cairo_scale(first_cr, 1.0 / zoomAreaScale, 1.0 / zoomAreaScale);
drawMarker(first_cr, ZOOMPIXSIZE / 2, ZOOMPIXSIZE / 2, 2);
cairo_set_source_surface(cr, first, 0, 0);
cairo_paint(cr);
cairo_surface_destroy(first);
cairo_destroy(first_cr);
}
return TRUE;
}
static gdouble clampZoom(gdouble zoom) {
if (zoom < MAIN_IMAGE_MIN_ZOOM)
return MAIN_IMAGE_MIN_ZOOM;
if (zoom > MAIN_IMAGE_MAX_ZOOM)
return MAIN_IMAGE_MAX_ZOOM;
return zoom;
}
static gdouble getAdjustmentUpperBound(GtkAdjustment *adjustment) {
gdouble lower, upper;
lower = gtk_adjustment_get_lower(adjustment);
upper = gtk_adjustment_get_upper(adjustment)
- gtk_adjustment_get_page_size(adjustment);
if (upper < lower)
upper = lower;
return upper;
}
static gdouble clampAdjustmentValue(GtkAdjustment *adjustment, gdouble value) {
gdouble lower, upper;
lower = gtk_adjustment_get_lower(adjustment);
upper = getAdjustmentUpperBound(adjustment);
if (value < lower)
return lower;
if (value > upper)
return upper;
return value;
}
static gboolean adjustmentBoundsCoverCanvas(struct TabData *tabData,
gdouble canvasW, gdouble canvasH) {
GtkAdjustment *hadj, *vadj;
gdouble hUpper, vUpper;
if (tabData == NULL || tabData->ViewPort == NULL)
return FALSE;
hadj = gtk_scrollable_get_hadjustment(GTK_SCROLLABLE(tabData->ViewPort));
vadj = gtk_scrollable_get_vadjustment(GTK_SCROLLABLE(tabData->ViewPort));
hUpper = gtk_adjustment_get_upper(hadj);
vUpper = gtk_adjustment_get_upper(vadj);
return hUpper + 1.0 >= canvasW && vUpper + 1.0 >= canvasH;
}
static void maybeApplyPendingZoomScroll(struct TabData *tabData) {
GtkAdjustment *hadj, *vadj;
gdouble hNew, vNew;
if (tabData == NULL || !tabData->pendingZoomScrollOnAdjust
|| tabData->ViewPort == NULL)
return;
if (!adjustmentBoundsCoverCanvas(tabData,
tabData->pendingZoomScrollCanvasSize[0],
tabData->pendingZoomScrollCanvasSize[1])) {
G3DBG(
"maybeApplyPendingZoomScroll: waiting target=(%.2f,%.2f) canvas=(%.2f,%.2f)\n",
tabData->pendingZoomScrollTarget[0],
tabData->pendingZoomScrollTarget[1],
tabData->pendingZoomScrollCanvasSize[0],
tabData->pendingZoomScrollCanvasSize[1]);
return;
}
hadj = gtk_scrollable_get_hadjustment(GTK_SCROLLABLE(tabData->ViewPort));
vadj = gtk_scrollable_get_vadjustment(GTK_SCROLLABLE(tabData->ViewPort));
hNew = clampAdjustmentValue(hadj, tabData->pendingZoomScrollTarget[0]);
vNew = clampAdjustmentValue(vadj, tabData->pendingZoomScrollTarget[1]);
gtk_adjustment_set_value(hadj, hNew);
gtk_adjustment_set_value(vadj, vNew);
tabData->pendingZoomScrollOnAdjust = FALSE;
G3DBG("maybeApplyPendingZoomScroll: applied target=(%.2f,%.2f)\n",
hNew, vNew);
debugDumpViewportState("maybeApplyPendingZoomScroll:end", tabData);
}
static void getViewportSize(struct TabData *tabData, gdouble *pageW, gdouble *pageH) {
GtkAdjustment *hadj, *vadj;
gdouble allocW, allocH, pageAdjW, pageAdjH;
hadj = gtk_scrollable_get_hadjustment(GTK_SCROLLABLE(tabData->ViewPort));
vadj = gtk_scrollable_get_vadjustment(GTK_SCROLLABLE(tabData->ViewPort));
allocW = gtk_widget_get_allocated_width(tabData->ViewPort);
allocH = gtk_widget_get_allocated_height(tabData->ViewPort);
pageAdjW = gtk_adjustment_get_page_size(hadj);
pageAdjH = gtk_adjustment_get_page_size(vadj);
if (allocW > 1.0 && pageAdjW > 1.0)
*pageW = MIN(allocW, pageAdjW);
else if (allocW > 1.0)
*pageW = allocW;
else
*pageW = pageAdjW;
if (allocH > 1.0 && pageAdjH > 1.0)
*pageH = MIN(allocH, pageAdjH);
else if (allocH > 1.0)
*pageH = allocH;
else
*pageH = pageAdjH;
}
static void setMainImageZoom(struct TabData *tabData, gdouble newZoom,
gdouble focusX, gdouble focusY) {
GtkAdjustment *hadj, *vadj;
gdouble oldZoom;
gdouble oldOriginX, oldOriginY;
gdouble hvalue, vvalue;
gdouble hImgFocus, vImgFocus;
gdouble hNewValue, vNewValue;
gdouble pageW, pageH;
gdouble newOriginX, newOriginY;
gdouble hLower, vLower, hMax, vMax;
gdouble newImageW, newImageH;
gdouble newCanvasW, newCanvasH;
gint newWidth, newHeight;
newZoom = clampZoom(newZoom);
oldZoom = tabData->viewZoom;
oldOriginX = tabData->viewOrigin[0];
oldOriginY = tabData->viewOrigin[1];
debugDumpViewportState("setMainImageZoom:begin", tabData);
hadj = gtk_scrollable_get_hadjustment(GTK_SCROLLABLE(tabData->ViewPort));
vadj = gtk_scrollable_get_vadjustment(GTK_SCROLLABLE(tabData->ViewPort));
hvalue = gtk_adjustment_get_value(hadj);
vvalue = gtk_adjustment_get_value(vadj);
getViewportSize(tabData, &pageW, &pageH);
if (focusX < 0)
focusX = pageW / 2.0;
if (focusY < 0)
focusY = pageH / 2.0;
hImgFocus = (hvalue + focusX - oldOriginX) / oldZoom;
vImgFocus = (vvalue + focusY - oldOriginY) / oldZoom;
tabData->viewZoom = newZoom;
newImageW = tabData->XSize * tabData->viewZoom;
newImageH = tabData->YSize * tabData->viewZoom;
newOriginX = MAIN_IMAGE_CANVAS_MIN_PAD;
newOriginY = MAIN_IMAGE_CANVAS_MIN_PAD;
newCanvasW = newImageW + 2.0 * newOriginX;
newCanvasH = newImageH + 2.0 * newOriginY;
tabData->viewOrigin[0] = newOriginX;
tabData->viewOrigin[1] = newOriginY;
tabData->viewCanvasSize[0] = newCanvasW;
tabData->viewCanvasSize[1] = newCanvasH;
newWidth = (gint) newCanvasW;
newHeight = (gint) newCanvasH;
gtk_widget_set_size_request(tabData->drawing_area, newWidth, newHeight);
gtk_widget_queue_resize(tabData->drawing_area);
gtk_widget_queue_resize(tabData->ViewPort);
gtk_widget_queue_draw(tabData->drawing_area);
if (tabData->zoom_area != NULL)
gtk_widget_queue_draw(tabData->zoom_area);
hNewValue = hImgFocus * newZoom + newOriginX - focusX;
vNewValue = vImgFocus * newZoom + newOriginY - focusY;
hLower = gtk_adjustment_get_lower(hadj);
vLower = gtk_adjustment_get_lower(vadj);
hMax = hLower + MAX(newCanvasW - pageW, 0.0);
vMax = vLower + MAX(newCanvasH - pageH, 0.0);
if (hNewValue < hLower)
hNewValue = hLower;
if (hNewValue > hMax)
hNewValue = hMax;
if (vNewValue < vLower)
vNewValue = vLower;
if (vNewValue > vMax)
vNewValue = vMax;
tabData->pendingZoomScrollTarget[0] = hNewValue;
tabData->pendingZoomScrollTarget[1] = vNewValue;
tabData->pendingZoomScrollCanvasSize[0] = newCanvasW;
tabData->pendingZoomScrollCanvasSize[1] = newCanvasH;
tabData->pendingZoomScrollOnAdjust = TRUE;
maybeApplyPendingZoomScroll(tabData);
G3DBG(
"setMainImageZoom:end newZoom=%.6f focus=(%.2f,%.2f) page=(%.2f,%.2f) newOrigin=(%.2f,%.2f) newCanvas=(%.2f,%.2f) newAdj=(%.2f,%.2f)\n",
newZoom, focusX, focusY, pageW, pageH, newOriginX, newOriginY, newCanvasW,
newCanvasH, hNewValue, vNewValue);
debugDumpViewportState("setMainImageZoom:end", tabData);
}
static gdouble calculateZoomToFit(struct TabData *tabData) {
gdouble pageW, pageH;
gdouble fitX, fitY;
getViewportSize(tabData, &pageW, &pageH);
if (pageW <= 1.0 || pageH <= 1.0)
return 1.0;
fitX = pageW / tabData->XSize;
fitY = pageH / tabData->YSize;
return clampZoom(MIN(fitX, fitY));
}
static void centerImageInView(struct TabData *tabData) {
GtkAdjustment *hadj, *vadj;
gdouble pageW, pageH;
gdouble imageW, imageH;
gdouble hLower, vLower, hMax, vMax;
gdouble hNew, vNew;
hadj = gtk_scrollable_get_hadjustment(GTK_SCROLLABLE(tabData->ViewPort));
vadj = gtk_scrollable_get_vadjustment(GTK_SCROLLABLE(tabData->ViewPort));
getViewportSize(tabData, &pageW, &pageH);
imageW = tabData->XSize * tabData->viewZoom;
imageH = tabData->YSize * tabData->viewZoom;
hNew = tabData->viewOrigin[0] + imageW / 2.0 - pageW / 2.0;
vNew = tabData->viewOrigin[1] + imageH / 2.0 - pageH / 2.0;
hLower = gtk_adjustment_get_lower(hadj);
vLower = gtk_adjustment_get_lower(vadj);
hMax = hLower + MAX(tabData->viewCanvasSize[0] - pageW, 0.0);
vMax = vLower + MAX(tabData->viewCanvasSize[1] - pageH, 0.0);
if (hNew < hLower)
hNew = hLower;
if (hNew > hMax)
hNew = hMax;
if (vNew < vLower)
vNew = vLower;
if (vNew > vMax)
vNew = vMax;
gtk_adjustment_set_value(hadj, hNew);
gtk_adjustment_set_value(vadj, vNew);
G3DBG(
"centerImageInView: page=(%.2f,%.2f) image=(%.2f,%.2f) targetAdj=(%.2f,%.2f)\n",
pageW, pageH, imageW, imageH, hNew, vNew);
debugDumpViewportState("centerImageInView:end", tabData);
}
static void maybeApplyPendingRecenter(struct TabData *tabData) {
if (tabData == NULL || !tabData->pendingRecenterOnAdjust
|| tabData->ViewPort == NULL)
return;
if (!adjustmentBoundsCoverCanvas(tabData, tabData->viewCanvasSize[0],
tabData->viewCanvasSize[1])) {
#ifdef G3DATA2_DEBUG
GtkAdjustment *hadj, *vadj;
gdouble hUpper, vUpper;
hadj = gtk_scrollable_get_hadjustment(GTK_SCROLLABLE(tabData->ViewPort));
vadj = gtk_scrollable_get_vadjustment(GTK_SCROLLABLE(tabData->ViewPort));
hUpper = gtk_adjustment_get_upper(hadj);
vUpper = gtk_adjustment_get_upper(vadj);
G3DBG(
"maybeApplyPendingRecenter: waiting (bounds too small) upper=(%.2f,%.2f) canvas=(%.2f,%.2f)\n",
hUpper, vUpper, tabData->viewCanvasSize[0], tabData->viewCanvasSize[1]);
#endif
return;
}
debugDumpViewportState("maybeApplyPendingRecenter:begin", tabData);
centerImageInView(tabData);
tabData->pendingRecenterOnAdjust = FALSE;
debugDumpViewportState("maybeApplyPendingRecenter:end", tabData);
}
static void adjustmentChangedEvent(GtkAdjustment *adjustment, gpointer data) {
struct TabData *tabData;
(void) adjustment;
tabData = (struct TabData *) data;
debugDumpViewportState("adjustmentChangedEvent", tabData);
maybeApplyPendingZoomScroll(tabData);
maybeApplyPendingRecenter(tabData);
}
static void zoomToFitAndCenter(struct TabData *tabData) {
debugDumpViewportState("zoomToFitAndCenter:begin", tabData);
setMainImageZoom(tabData, calculateZoomToFit(tabData), -1.0, -1.0);
tabData->pendingRecenterOnAdjust = TRUE;
maybeApplyPendingRecenter(tabData);
debugDumpViewportState("zoomToFitAndCenter:end", tabData);
}
static void maybeApplyInitialZoomToFit(struct TabData *tabData) {
if (tabData == NULL || !tabData->pendingInitialZoomToFit
|| tabData->drawing_area == NULL || tabData->ViewPort == NULL)
return;
if (tabData->XSize <= 0 || tabData->YSize <= 0)
return;
if (gtk_widget_get_allocated_width(tabData->ViewPort) <= 1
|| gtk_widget_get_allocated_height(tabData->ViewPort) <= 1)
return;
debugDumpViewportState("maybeApplyInitialZoomToFit:ready", tabData);
zoomToFitAndCenter(tabData);
tabData->pendingInitialZoomToFit = FALSE;
debugDumpViewportState("maybeApplyInitialZoomToFit:done", tabData);
}
static gboolean applyInitialZoomToFit(gpointer data) {
struct TabData *tabData;
tabData = (struct TabData *) data;
debugDumpViewportState("applyInitialZoomToFit", tabData);
maybeApplyInitialZoomToFit(tabData);
return G_SOURCE_REMOVE;
}
static void viewportSizeAllocateEvent(GtkWidget *widget, GtkAllocation *allocation,
gpointer data) {
(void) widget;
G3DBG("viewportSizeAllocateEvent: alloc=%dx%d\n", allocation->width,
allocation->height);
maybeApplyInitialZoomToFit((struct TabData *) data);
maybeApplyPendingZoomScroll((struct TabData *) data);
maybeApplyPendingRecenter((struct TabData *) data);
}
static void getImageCoords(struct TabData *tabData, gdouble widgetX,
gdouble widgetY, gdouble *imageX, gdouble *imageY) {
if (tabData->viewZoom <= 0)
tabData->viewZoom = 1.0;
*imageX = (widgetX - tabData->viewOrigin[0]) / tabData->viewZoom;
*imageY = (widgetY - tabData->viewOrigin[1]) / tabData->viewZoom;
}
static GtkWidget *g3TableNew(guint rows, guint columns, gboolean homogeneous) {
GtkWidget *grid = gtk_grid_new();
(void) rows;
(void) columns;
gtk_grid_set_row_homogeneous(GTK_GRID(grid), homogeneous);
gtk_grid_set_column_homogeneous(GTK_GRID(grid), homogeneous);
return grid;
}
static void g3TableSetRowSpacings(GtkWidget *grid, guint spacing) {
gtk_grid_set_row_spacing(GTK_GRID(grid), spacing);
}