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putty-source/unix/columns.c

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/*
* columns.c - implementation of the `Columns' GTK layout container.
*/
#include <assert.h>
#include <gtk/gtk.h>
#include "defs.h"
#include "gtkcompat.h"
#include "columns.h"
#if GTK_CHECK_VERSION(2,0,0)
/* The "focus" method lives in GtkWidget from GTK 2 onwards, but it
* was in GtkContainer in GTK 1 */
#define FOCUS_METHOD_SUPERCLASS GtkWidget
#define FOCUS_METHOD_LOCATION widget_class /* used in columns_init */
#define CHILD_FOCUS(cont, dir) gtk_widget_child_focus(GTK_WIDGET(cont), dir)
#else
#define FOCUS_METHOD_SUPERCLASS GtkContainer
#define FOCUS_METHOD_LOCATION container_class
#define CHILD_FOCUS(cont, dir) gtk_container_focus(GTK_CONTAINER(cont), dir)
#endif
static void columns_init(Columns *cols);
static void columns_class_init(ColumnsClass *klass);
#if !GTK_CHECK_VERSION(2,0,0)
static void columns_finalize(GtkObject *object);
#else
static void columns_finalize(GObject *object);
#endif
static void columns_map(GtkWidget *widget);
static void columns_unmap(GtkWidget *widget);
#if !GTK_CHECK_VERSION(2,0,0)
static void columns_draw(GtkWidget *widget, GdkRectangle *area);
static gint columns_expose(GtkWidget *widget, GdkEventExpose *event);
#endif
static void columns_base_add(GtkContainer *container, GtkWidget *widget);
static void columns_remove(GtkContainer *container, GtkWidget *widget);
static void columns_forall(GtkContainer *container, gboolean include_internals,
GtkCallback callback, gpointer callback_data);
static gint columns_focus(FOCUS_METHOD_SUPERCLASS *container,
GtkDirectionType dir);
static GType columns_child_type(GtkContainer *container);
#if GTK_CHECK_VERSION(3,0,0)
static void columns_get_preferred_width(GtkWidget *widget,
gint *min, gint *nat);
static void columns_get_preferred_height(GtkWidget *widget,
gint *min, gint *nat);
static void columns_get_preferred_width_for_height(GtkWidget *widget,
gint height,
gint *min, gint *nat);
static void columns_get_preferred_height_for_width(GtkWidget *widget,
gint width,
gint *min, gint *nat);
#else
static void columns_size_request(GtkWidget *widget, GtkRequisition *req);
#endif
static void columns_size_allocate(GtkWidget *widget, GtkAllocation *alloc);
static GtkContainerClass *parent_class = NULL;
#if !GTK_CHECK_VERSION(2,0,0)
GType columns_get_type(void)
{
static GType columns_type = 0;
if (!columns_type) {
static const GtkTypeInfo columns_info = {
"Columns",
sizeof(Columns),
sizeof(ColumnsClass),
(GtkClassInitFunc) columns_class_init,
(GtkObjectInitFunc) columns_init,
/* reserved_1 */ NULL,
/* reserved_2 */ NULL,
(GtkClassInitFunc) NULL,
};
columns_type = gtk_type_unique(GTK_TYPE_CONTAINER, &columns_info);
}
return columns_type;
}
#else
GType columns_get_type(void)
{
static GType columns_type = 0;
if (!columns_type) {
static const GTypeInfo columns_info = {
sizeof(ColumnsClass),
NULL,
NULL,
(GClassInitFunc) columns_class_init,
NULL,
NULL,
sizeof(Columns),
0,
(GInstanceInitFunc)columns_init,
};
columns_type = g_type_register_static(GTK_TYPE_CONTAINER, "Columns",
&columns_info, 0);
}
return columns_type;
}
#endif
static gint (*columns_inherited_focus)(FOCUS_METHOD_SUPERCLASS *container,
GtkDirectionType direction);
static void columns_class_init(ColumnsClass *klass)
{
#if !GTK_CHECK_VERSION(2,0,0)
GtkObjectClass *object_class = (GtkObjectClass *)klass;
GtkWidgetClass *widget_class = (GtkWidgetClass *)klass;
GtkContainerClass *container_class = (GtkContainerClass *)klass;
#else
GObjectClass *object_class = G_OBJECT_CLASS(klass);
GtkWidgetClass *widget_class = GTK_WIDGET_CLASS(klass);
GtkContainerClass *container_class = GTK_CONTAINER_CLASS(klass);
#endif
#if !GTK_CHECK_VERSION(2,0,0)
parent_class = gtk_type_class(GTK_TYPE_CONTAINER);
#else
parent_class = g_type_class_peek_parent(klass);
#endif
object_class->finalize = columns_finalize;
widget_class->map = columns_map;
widget_class->unmap = columns_unmap;
#if !GTK_CHECK_VERSION(2,0,0)
widget_class->draw = columns_draw;
widget_class->expose_event = columns_expose;
#endif
#if GTK_CHECK_VERSION(3,0,0)
widget_class->get_preferred_width = columns_get_preferred_width;
widget_class->get_preferred_height = columns_get_preferred_height;
widget_class->get_preferred_width_for_height =
columns_get_preferred_width_for_height;
widget_class->get_preferred_height_for_width =
columns_get_preferred_height_for_width;
#else
widget_class->size_request = columns_size_request;
#endif
widget_class->size_allocate = columns_size_allocate;
container_class->add = columns_base_add;
container_class->remove = columns_remove;
container_class->forall = columns_forall;
container_class->child_type = columns_child_type;
/* Save the previous value of this method. */
if (!columns_inherited_focus)
columns_inherited_focus = FOCUS_METHOD_LOCATION->focus;
FOCUS_METHOD_LOCATION->focus = columns_focus;
}
static void columns_init(Columns *cols)
{
gtk_widget_set_has_window(GTK_WIDGET(cols), false);
cols->children = NULL;
cols->spacing = 0;
}
static void columns_child_free(gpointer vchild)
{
ColumnsChild *child = (ColumnsChild *)vchild;
if (child->percentages)
g_free(child->percentages);
g_free(child);
}
static void columns_finalize(
#if !GTK_CHECK_VERSION(2,0,0)
GtkObject *object
#else
GObject *object
#endif
)
{
Columns *cols;
g_return_if_fail(object != NULL);
g_return_if_fail(IS_COLUMNS(object));
cols = COLUMNS(object);
#if !GTK_CHECK_VERSION(2,0,0)
{
GList *node;
for (node = cols->children; node; node = node->next)
if (node->data)
columns_child_free(node->data);
}
g_list_free(cols->children);
#else
g_list_free_full(cols->children, columns_child_free);
#endif
cols->children = NULL;
#if !GTK_CHECK_VERSION(2,0,0)
GTK_OBJECT_CLASS(parent_class)->finalize(object);
#else
G_OBJECT_CLASS(parent_class)->finalize(object);
#endif
}
/*
* These appear to be thoroughly tedious functions; the only reason
* we have to reimplement them at all is because we defined our own
* format for our GList of children...
*/
static void columns_map(GtkWidget *widget)
{
Columns *cols;
ColumnsChild *child;
GList *children;
g_return_if_fail(widget != NULL);
g_return_if_fail(IS_COLUMNS(widget));
cols = COLUMNS(widget);
gtk_widget_set_mapped(GTK_WIDGET(cols), true);
for (children = cols->children;
children && (child = children->data);
children = children->next) {
if (child->widget &&
gtk_widget_get_visible(child->widget) &&
!gtk_widget_get_mapped(child->widget))
gtk_widget_map(child->widget);
}
}
static void columns_unmap(GtkWidget *widget)
{
Columns *cols;
ColumnsChild *child;
GList *children;
g_return_if_fail(widget != NULL);
g_return_if_fail(IS_COLUMNS(widget));
cols = COLUMNS(widget);
gtk_widget_set_mapped(GTK_WIDGET(cols), false);
for (children = cols->children;
children && (child = children->data);
children = children->next) {
if (child->widget &&
gtk_widget_get_visible(child->widget) &&
gtk_widget_get_mapped(child->widget))
gtk_widget_unmap(child->widget);
}
}
#if !GTK_CHECK_VERSION(2,0,0)
static void columns_draw(GtkWidget *widget, GdkRectangle *area)
{
Columns *cols;
ColumnsChild *child;
GList *children;
GdkRectangle child_area;
g_return_if_fail(widget != NULL);
g_return_if_fail(IS_COLUMNS(widget));
if (GTK_WIDGET_DRAWABLE(widget)) {
cols = COLUMNS(widget);
for (children = cols->children;
children && (child = children->data);
children = children->next) {
if (child->widget &&
GTK_WIDGET_DRAWABLE(child->widget) &&
gtk_widget_intersect(child->widget, area, &child_area))
gtk_widget_draw(child->widget, &child_area);
}
}
}
static gint columns_expose(GtkWidget *widget, GdkEventExpose *event)
{
Columns *cols;
ColumnsChild *child;
GList *children;
GdkEventExpose child_event;
g_return_val_if_fail(widget != NULL, false);
g_return_val_if_fail(IS_COLUMNS(widget), false);
g_return_val_if_fail(event != NULL, false);
if (GTK_WIDGET_DRAWABLE(widget)) {
cols = COLUMNS(widget);
child_event = *event;
for (children = cols->children;
children && (child = children->data);
children = children->next) {
if (child->widget &&
GTK_WIDGET_DRAWABLE(child->widget) &&
GTK_WIDGET_NO_WINDOW(child->widget) &&
gtk_widget_intersect(child->widget, &event->area,
&child_event.area))
gtk_widget_event(child->widget, (GdkEvent *)&child_event);
}
}
return false;
}
#endif
static void columns_base_add(GtkContainer *container, GtkWidget *widget)
{
Columns *cols;
g_return_if_fail(container != NULL);
g_return_if_fail(IS_COLUMNS(container));
g_return_if_fail(widget != NULL);
cols = COLUMNS(container);
/*
* Default is to add a new widget spanning all columns.
*/
columns_add(cols, widget, 0, 0); /* 0 means ncols */
}
static void columns_remove(GtkContainer *container, GtkWidget *widget)
{
Columns *cols;
ColumnsChild *child;
GtkWidget *childw;
GList *children;
g_return_if_fail(container != NULL);
g_return_if_fail(IS_COLUMNS(container));
g_return_if_fail(widget != NULL);
cols = COLUMNS(container);
for (children = cols->children;
children && (child = children->data);
children = children->next) {
if (child->widget != widget)
continue;
bool need_layout = false;
if (gtk_widget_get_visible(widget))
need_layout = true;
gtk_widget_unparent(widget);
cols->children = g_list_remove_link(cols->children, children);
g_list_free(children);
/* Unlink this widget from its valign list, and if anything
* else on the list is still visible, ensure we recompute our
* layout */
for (ColumnsChild *ch = child->valign_next; ch != child;
ch = ch->valign_next)
if (gtk_widget_get_visible(ch->widget))
need_layout = true;
child->valign_next->valign_prev = child->valign_prev;
child->valign_prev->valign_next = child->valign_next;
if (cols->vexpand == child)
cols->vexpand = NULL;
g_free(child);
if (need_layout)
gtk_widget_queue_resize(GTK_WIDGET(container));
break;
}
for (children = cols->taborder;
children && (childw = children->data);
children = children->next) {
if (childw != widget)
continue;
cols->taborder = g_list_remove_link(cols->taborder, children);
g_list_free(children);
break;
}
}
static void columns_forall(GtkContainer *container, gboolean include_internals,
GtkCallback callback, gpointer callback_data)
{
Columns *cols;
ColumnsChild *child;
GList *children, *next;
g_return_if_fail(container != NULL);
g_return_if_fail(IS_COLUMNS(container));
g_return_if_fail(callback != NULL);
cols = COLUMNS(container);
for (children = cols->children;
children && (child = children->data);
children = next) {
/*
* We can't wait until after the callback to assign
* `children = children->next', because the callback might
* be gtk_widget_destroy, which would remove the link
* `children' from the list! So instead we must get our
* hands on the value of the `next' pointer _before_ the
* callback.
*/
next = children->next;
if (child->widget)
callback(child->widget, callback_data);
}
}
static GType columns_child_type(GtkContainer *container)
{
return GTK_TYPE_WIDGET;
}
GtkWidget *columns_new(gint spacing)
{
Columns *cols;
#if !GTK_CHECK_VERSION(2,0,0)
cols = gtk_type_new(columns_get_type());
#else
cols = g_object_new(TYPE_COLUMNS, NULL);
#endif
cols->spacing = spacing;
return GTK_WIDGET(cols);
}
void columns_set_cols(Columns *cols, gint ncols, const gint *percentages)
{
ColumnsChild *childdata;
gint i;
g_return_if_fail(cols != NULL);
g_return_if_fail(IS_COLUMNS(cols));
g_return_if_fail(ncols > 0);
g_return_if_fail(percentages != NULL);
childdata = g_new(ColumnsChild, 1);
childdata->widget = NULL;
childdata->ncols = ncols;
childdata->percentages = g_new(gint, ncols);
childdata->force_left = false;
for (i = 0; i < ncols; i++)
childdata->percentages[i] = percentages[i];
cols->children = g_list_append(cols->children, childdata);
}
void columns_add(Columns *cols, GtkWidget *child,
gint colstart, gint colspan)
{
ColumnsChild *childdata;
g_return_if_fail(cols != NULL);
g_return_if_fail(IS_COLUMNS(cols));
g_return_if_fail(child != NULL);
g_return_if_fail(gtk_widget_get_parent(child) == NULL);
childdata = g_new(ColumnsChild, 1);
childdata->widget = child;
childdata->colstart = colstart;
childdata->colspan = colspan;
childdata->force_left = false;
childdata->valign_next = childdata;
childdata->valign_prev = childdata;
childdata->percentages = NULL;
cols->children = g_list_append(cols->children, childdata);
cols->taborder = g_list_append(cols->taborder, child);
gtk_widget_set_parent(child, GTK_WIDGET(cols));
if (gtk_widget_get_realized(GTK_WIDGET(cols)))
gtk_widget_realize(child);
if (gtk_widget_get_visible(GTK_WIDGET(cols)) &&
gtk_widget_get_visible(child)) {
if (gtk_widget_get_mapped(GTK_WIDGET(cols)))
gtk_widget_map(child);
gtk_widget_queue_resize(child);
}
}
static ColumnsChild *columns_find_child(Columns *cols, GtkWidget *widget)
{
GList *children;
ColumnsChild *child;
for (children = cols->children;
children && (child = children->data);
children = children->next) {
if (child->widget == widget)
return child;
}
return NULL;
}
void columns_force_left_align(Columns *cols, GtkWidget *widget)
{
ColumnsChild *child;
g_return_if_fail(cols != NULL);
g_return_if_fail(IS_COLUMNS(cols));
g_return_if_fail(widget != NULL);
child = columns_find_child(cols, widget);
g_return_if_fail(child != NULL);
child->force_left = true;
if (gtk_widget_get_visible(widget))
gtk_widget_queue_resize(GTK_WIDGET(cols));
}
void columns_align_next_to(Columns *cols, GtkWidget *cw1, GtkWidget *cw2)
{
ColumnsChild *child1, *child2;
g_return_if_fail(cols != NULL);
g_return_if_fail(IS_COLUMNS(cols));
g_return_if_fail(cw1 != NULL);
g_return_if_fail(cw2 != NULL);
child1 = columns_find_child(cols, cw1);
g_return_if_fail(child1 != NULL);
child2 = columns_find_child(cols, cw2);
g_return_if_fail(child2 != NULL);
ColumnsChild *child1prev = child1->valign_prev;
ColumnsChild *child2prev = child2->valign_prev;
child1prev->valign_next = child2;
child2->valign_prev = child1prev;
child2prev->valign_next = child1;
child1->valign_prev = child2prev;
if (gtk_widget_get_visible(cw1) || gtk_widget_get_visible(cw2))
gtk_widget_queue_resize(GTK_WIDGET(cols));
}
void columns_taborder_last(Columns *cols, GtkWidget *widget)
{
GtkWidget *childw;
GList *children;
g_return_if_fail(cols != NULL);
g_return_if_fail(IS_COLUMNS(cols));
g_return_if_fail(widget != NULL);
for (children = cols->taborder;
children && (childw = children->data);
children = children->next) {
if (childw != widget)
continue;
cols->taborder = g_list_remove_link(cols->taborder, children);
g_list_free(children);
cols->taborder = g_list_append(cols->taborder, widget);
break;
}
}
void columns_vexpand(Columns *cols, GtkWidget *widget)
{
g_return_if_fail(cols != NULL);
g_return_if_fail(IS_COLUMNS(cols));
g_return_if_fail(widget != NULL);
ColumnsChild *child = columns_find_child(cols, widget);
g_return_if_fail(child != NULL);
cols->vexpand = child;
}
/*
* Override GtkContainer's focus movement so the user can
* explicitly specify the tab order.
*/
static gint columns_focus(FOCUS_METHOD_SUPERCLASS *super, GtkDirectionType dir)
{
Columns *cols;
GList *pos;
GtkWidget *focuschild;
g_return_val_if_fail(super != NULL, false);
g_return_val_if_fail(IS_COLUMNS(super), false);
cols = COLUMNS(super);
if (!gtk_widget_is_drawable(GTK_WIDGET(cols)) ||
!gtk_widget_is_sensitive(GTK_WIDGET(cols)))
return false;
if (!gtk_widget_get_can_focus(GTK_WIDGET(cols)) &&
(dir == GTK_DIR_TAB_FORWARD || dir == GTK_DIR_TAB_BACKWARD)) {
focuschild = gtk_container_get_focus_child(GTK_CONTAINER(cols));
gtk_container_set_focus_child(GTK_CONTAINER(cols), NULL);
if (dir == GTK_DIR_TAB_FORWARD)
pos = cols->taborder;
else
pos = g_list_last(cols->taborder);
while (pos) {
GtkWidget *child = pos->data;
if (focuschild) {
if (focuschild == child) {
focuschild = NULL; /* now we can start looking in here */
if (gtk_widget_is_drawable(child) &&
GTK_IS_CONTAINER(child) &&
!gtk_widget_has_focus(child)) {
if (CHILD_FOCUS(child, dir))
return true;
}
}
} else if (gtk_widget_is_drawable(child)) {
if (GTK_IS_CONTAINER(child)) {
if (CHILD_FOCUS(child, dir))
return true;
} else if (gtk_widget_get_can_focus(child)) {
gtk_widget_grab_focus(child);
return true;
}
}
if (dir == GTK_DIR_TAB_FORWARD)
pos = pos->next;
else
pos = pos->prev;
}
return false;
} else
return columns_inherited_focus(super, dir);
}
/*
* Underlying parts of the layout algorithm, to compute the Columns
* container's width or height given the widths or heights of its
* children. These will be called in various ways with different
* notions of width and height in use, so we abstract them out and
* pass them a 'get width' or 'get height' function pointer.
*/
typedef gint (*widget_dim_fn_t)(ColumnsChild *child);
static gint columns_compute_width(Columns *cols, widget_dim_fn_t get_width)
{
ColumnsChild *child;
GList *children;
gint i, ncols, colspan, retwidth, childwidth;
const gint *percentages;
static const gint onecol[] = { 100 };
#ifdef COLUMNS_WIDTH_DIAGNOSTICS
printf("compute_width(%p): start\n", cols);
#endif
retwidth = 0;
ncols = 1;
percentages = onecol;
for (children = cols->children;
children && (child = children->data);
children = children->next) {
if (!child->widget) {
/* Column reconfiguration. */
ncols = child->ncols;
percentages = child->percentages;
continue;
}
/* Only take visible widgets into account. */
if (!gtk_widget_get_visible(child->widget))
continue;
childwidth = get_width(child);
colspan = child->colspan ? child->colspan : ncols-child->colstart;
assert(colspan > 0);
#ifdef COLUMNS_WIDTH_DIAGNOSTICS
printf("compute_width(%p): ", cols);
if (GTK_IS_LABEL(child->widget))
printf("label %p '%s' wrap=%s: ", child->widget,
gtk_label_get_text(GTK_LABEL(child->widget)),
(gtk_label_get_line_wrap(GTK_LABEL(child->widget))
? "true" : "false"));
else
printf("widget %p: ", child->widget);
{
gint min, nat;
gtk_widget_get_preferred_width(child->widget, &min, &nat);
printf("minwidth=%d natwidth=%d ", min, nat);
}
printf("thiswidth=%d span=%d\n", childwidth, colspan);
#endif
/*
* To compute width: we know that childwidth + cols->spacing
* needs to equal a certain percentage of the full width of
* the container. So we work this value out, figure out how
* wide the container will need to be to make that percentage
* of it equal to that width, and ensure our returned width is
* at least that much. Very simple really.
*/
{
int percent, thiswid, fullwid;
percent = 0;
for (i = 0; i < colspan; i++)
percent += percentages[child->colstart+i];
thiswid = childwidth + cols->spacing;
/*
* Since childwidth is (at least sometimes) the _minimum_
* size the child needs, we must ensure that it gets _at
* least_ that size. Hence, when scaling thiswid up to
* fullwid, we must round up, which means adding percent-1
* before dividing by percent.
*/
fullwid = (thiswid * 100 + percent - 1) / percent;
#ifdef COLUMNS_WIDTH_DIAGNOSTICS
printf("compute_width(%p): after %p, thiswid=%d fullwid=%d\n",
cols, child->widget, thiswid, fullwid);
#endif
/*
* The above calculation assumes every widget gets
* cols->spacing on the right. So we subtract
* cols->spacing here to account for the extra load of
* spacing on the right.
*/
if (retwidth < fullwid - cols->spacing)
retwidth = fullwid - cols->spacing;
}
}
retwidth += 2*gtk_container_get_border_width(GTK_CONTAINER(cols));
#ifdef COLUMNS_WIDTH_DIAGNOSTICS
printf("compute_width(%p): done, returning %d\n", cols, retwidth);
#endif
return retwidth;
}
static void columns_alloc_horiz(Columns *cols, gint ourwidth,
widget_dim_fn_t get_width)
{
ColumnsChild *child;
GList *children;
gint i, ncols, colspan, border, *colxpos, childwidth;
border = gtk_container_get_border_width(GTK_CONTAINER(cols));
ncols = 1;
/* colxpos gives the starting x position of each column.
* We supply n+1 of them, so that we can find the RH edge easily.
* All ending x positions are expected to be adjusted afterwards by
* subtracting the spacing. */
colxpos = g_new(gint, 2);
colxpos[0] = 0;
colxpos[1] = ourwidth - 2*border + cols->spacing;
for (children = cols->children;
children && (child = children->data);
children = children->next) {
if (!child->widget) {
gint percent;
/* Column reconfiguration. */
ncols = child->ncols;
colxpos = g_renew(gint, colxpos, ncols + 1);
colxpos[0] = 0;
percent = 0;
for (i = 0; i < ncols; i++) {
percent += child->percentages[i];
colxpos[i+1] = (((ourwidth - 2*border) + cols->spacing)
* percent / 100);
}
continue;
}
/* Only take visible widgets into account. */
if (!gtk_widget_get_visible(child->widget))
continue;
childwidth = get_width(child);
colspan = child->colspan ? child->colspan : ncols-child->colstart;
/*
* Starting x position is cols[colstart].
* Ending x position is cols[colstart+colspan] - spacing.
*
* Unless we're forcing left, in which case the width is
* exactly the requisition width.
*/
child->x = colxpos[child->colstart];
if (child->force_left)
child->w = childwidth;
else
child->w = (colxpos[child->colstart+colspan] -
colxpos[child->colstart] - cols->spacing);
}
g_free(colxpos);
}
static gint columns_compute_height(Columns *cols, widget_dim_fn_t get_height)
{
ColumnsChild *child;
GList *children;
gint i, ncols, colspan, *colypos, retheight, childheight;
retheight = cols->spacing;
ncols = 1;
colypos = g_new(gint, 1);
colypos[0] = 0;
for (children = cols->children;
children && (child = children->data);
children = children->next) {
if (!child->widget) {
/* Column reconfiguration. */
for (i = 1; i < ncols; i++) {
if (colypos[0] < colypos[i])
colypos[0] = colypos[i];
}
ncols = child->ncols;
colypos = g_renew(gint, colypos, ncols);
for (i = 1; i < ncols; i++)
colypos[i] = colypos[0];
continue;
}
/* Only take visible widgets into account. */
if (!gtk_widget_get_visible(child->widget))
continue;
childheight = get_height(child);
for (ColumnsChild *ch = child->valign_next; ch != child;
ch = ch->valign_next) {
gint childheight2 = get_height(ch);
if (childheight < childheight2)
childheight = childheight2;
}
colspan = child->colspan ? child->colspan : ncols-child->colstart;
/*
* To compute height: the widget's top will be positioned at
* the largest y value so far reached in any of the columns it
* crosses. Then it will go down by childheight plus padding;
* and the point it reaches at the bottom is the new y value
* in all those columns, and minus the padding it is also a
* lower bound on our own height.
*/
{
int topy, boty;
topy = 0;
for (i = 0; i < colspan; i++) {
if (topy < colypos[child->colstart+i])
topy = colypos[child->colstart+i];
}
boty = topy + childheight + cols->spacing;
for (i = 0; i < colspan; i++) {
colypos[child->colstart+i] = boty;
}
if (retheight < boty - cols->spacing)
retheight = boty - cols->spacing;
}
}
retheight += 2*gtk_container_get_border_width(GTK_CONTAINER(cols));
g_free(colypos);
return retheight;
}
static void columns_alloc_vert(Columns *cols, gint ourheight,
widget_dim_fn_t get_height)
{
ColumnsChild *child;
GList *children;
gint i, ncols, colspan, *colypos, realheight, fakeheight, vexpand_extra;
if (cols->vexpand) {
gint minheight = columns_compute_height(cols, get_height);
vexpand_extra = ourheight - minheight;
} else {
vexpand_extra = 0;
}
ncols = 1;
/* As in size_request, colypos is the lowest y reached in each column. */
colypos = g_new(gint, 1);
colypos[0] = 0;
for (children = cols->children;
children && (child = children->data);
children = children->next)
child->visited = false;
GTK: fix y computation in align_next_to. The protocol selector widgets were misaligned in GTK as well as on Windows, but for a completely different reason. (I guess both bugs must have been introduced at the same time when I reworked the system to tolerate more than two aligned widgets in commit b5ab90143a2df7f.) To vertically align N widgets, you have to first figure out what range of y-coordinates they jointly occupy, and then centre each one within that range. We were trying to do both jobs in the same pass, which meant trying to place the first widget before finding out where the last one will be. To do this, we were separately computing the y-range's start and width, the former by taking max of the y-coordinates _seen so far_, and the latter by taking max of _all_ the widgets' heights. This has two problems. One is that if you later find out that the y-coordinate of the top of the range needs to be lower than you'd previously realised, it's too late to go back and reposition the widgets you've already placed. But that's a theoretical issue that would only come up with more complicated column layouts than we've actually used. (And probably more complicated than would even be _sensible_ to use.) The other, more immediate, problem: the y-coordinates we were using for already-placed widgets in the set were the ones _after_ we adjusted each one for vertical centring. So if the first widget is short and the second taller (say, heights 20 and 30 pixels), then the first widget will be offset downwards by 5 pixels, but the second widget will use that offset y-coordinate as the _top_ of the range to fit itself into, and hence, will also be 5 pixels downward from where it should have been. I think only the second of those problems is immediately concerning, but it's easier to fix both at once. I've removed the y-adjustment for vertical centring from the main layout loop, and put it in a separate pass run after the main layout finishes.
2022-09-06 10:13:50 +00:00
/*
* Main layout loop. In this loop, vertically aligned controls are
* only half dealt with: we assign each one enough _height_ to
* match the others in its group, but we don't adjust its y
* coordinates yet.
*/
for (children = cols->children;
children && (child = children->data);
children = children->next) {
if (!child->widget) {
/* Column reconfiguration. */
for (i = 1; i < ncols; i++) {
if (colypos[0] < colypos[i])
colypos[0] = colypos[i];
}
ncols = child->ncols;
colypos = g_renew(gint, colypos, ncols);
for (i = 1; i < ncols; i++)
colypos[i] = colypos[0];
continue;
}
/* Only take visible widgets into account. */
if (!gtk_widget_get_visible(child->widget))
continue;
int ymin = 0;
realheight = get_height(child);
if (child == cols->vexpand)
realheight += vexpand_extra;
fakeheight = realheight;
for (ColumnsChild *ch = child->valign_next; ch != child;
ch = ch->valign_next) {
gint childheight2 = get_height(ch);
if (fakeheight < childheight2)
fakeheight = childheight2;
if (ch->visited && ymin < ch->y)
ymin = ch->y;
}
colspan = child->colspan ? child->colspan : ncols-child->colstart;
/*
* To compute height: the widget's top will be positioned
* at the largest y value so far reached in any of the
* columns it crosses. Then it will go down by creq.height
* plus padding; and the point it reaches at the bottom is
* the new y value in all those columns.
*/
{
int topy, boty;
topy = ymin;
for (i = 0; i < colspan; i++) {
if (topy < colypos[child->colstart+i])
topy = colypos[child->colstart+i];
}
GTK: fix y computation in align_next_to. The protocol selector widgets were misaligned in GTK as well as on Windows, but for a completely different reason. (I guess both bugs must have been introduced at the same time when I reworked the system to tolerate more than two aligned widgets in commit b5ab90143a2df7f.) To vertically align N widgets, you have to first figure out what range of y-coordinates they jointly occupy, and then centre each one within that range. We were trying to do both jobs in the same pass, which meant trying to place the first widget before finding out where the last one will be. To do this, we were separately computing the y-range's start and width, the former by taking max of the y-coordinates _seen so far_, and the latter by taking max of _all_ the widgets' heights. This has two problems. One is that if you later find out that the y-coordinate of the top of the range needs to be lower than you'd previously realised, it's too late to go back and reposition the widgets you've already placed. But that's a theoretical issue that would only come up with more complicated column layouts than we've actually used. (And probably more complicated than would even be _sensible_ to use.) The other, more immediate, problem: the y-coordinates we were using for already-placed widgets in the set were the ones _after_ we adjusted each one for vertical centring. So if the first widget is short and the second taller (say, heights 20 and 30 pixels), then the first widget will be offset downwards by 5 pixels, but the second widget will use that offset y-coordinate as the _top_ of the range to fit itself into, and hence, will also be 5 pixels downward from where it should have been. I think only the second of those problems is immediately concerning, but it's easier to fix both at once. I've removed the y-adjustment for vertical centring from the main layout loop, and put it in a separate pass run after the main layout finishes.
2022-09-06 10:13:50 +00:00
child->y = topy;
child->h = realheight;
child->visited = true;
boty = topy + fakeheight + cols->spacing;
for (i = 0; i < colspan; i++) {
colypos[child->colstart+i] = boty;
}
}
}
GTK: fix y computation in align_next_to. The protocol selector widgets were misaligned in GTK as well as on Windows, but for a completely different reason. (I guess both bugs must have been introduced at the same time when I reworked the system to tolerate more than two aligned widgets in commit b5ab90143a2df7f.) To vertically align N widgets, you have to first figure out what range of y-coordinates they jointly occupy, and then centre each one within that range. We were trying to do both jobs in the same pass, which meant trying to place the first widget before finding out where the last one will be. To do this, we were separately computing the y-range's start and width, the former by taking max of the y-coordinates _seen so far_, and the latter by taking max of _all_ the widgets' heights. This has two problems. One is that if you later find out that the y-coordinate of the top of the range needs to be lower than you'd previously realised, it's too late to go back and reposition the widgets you've already placed. But that's a theoretical issue that would only come up with more complicated column layouts than we've actually used. (And probably more complicated than would even be _sensible_ to use.) The other, more immediate, problem: the y-coordinates we were using for already-placed widgets in the set were the ones _after_ we adjusted each one for vertical centring. So if the first widget is short and the second taller (say, heights 20 and 30 pixels), then the first widget will be offset downwards by 5 pixels, but the second widget will use that offset y-coordinate as the _top_ of the range to fit itself into, and hence, will also be 5 pixels downward from where it should have been. I think only the second of those problems is immediately concerning, but it's easier to fix both at once. I've removed the y-adjustment for vertical centring from the main layout loop, and put it in a separate pass run after the main layout finishes.
2022-09-06 10:13:50 +00:00
/*
* Now make a separate pass that deals with vertical alignment by
* moving controls downwards based on the difference between their
* own height and the largest height of anything in their group.
*/
for (children = cols->children;
children && (child = children->data);
children = children->next) {
if (!child->widget)
continue;
if (!gtk_widget_get_visible(child->widget))
continue;
fakeheight = realheight = child->h;
for (ColumnsChild *ch = child->valign_next; ch != child;
ch = ch->valign_next) {
if (fakeheight < ch->h)
fakeheight = ch->h;
}
child->y += fakeheight/2 - realheight/2;
}
g_free(colypos);
}
/*
* Now here comes the interesting bit. The actual layout part is
* done in the following two functions:
*
* columns_size_request() examines the list of widgets held in the
* Columns, and returns a requisition stating the absolute minimum
* size it can bear to be.
*
* columns_size_allocate() is given an allocation telling it what
* size the whole container is going to be, and it calls
* gtk_widget_size_allocate() on all of its (visible) children to
* set their size and position relative to the top left of the
* container.
*/
#if !GTK_CHECK_VERSION(3,0,0)
static gint columns_gtk2_get_width(ColumnsChild *child)
{
GtkRequisition creq;
gtk_widget_size_request(child->widget, &creq);
return creq.width;
}
static gint columns_gtk2_get_height(ColumnsChild *child)
{
GtkRequisition creq;
gtk_widget_size_request(child->widget, &creq);
return creq.height;
}
static void columns_size_request(GtkWidget *widget, GtkRequisition *req)
{
Columns *cols;
g_return_if_fail(widget != NULL);
g_return_if_fail(IS_COLUMNS(widget));
g_return_if_fail(req != NULL);
cols = COLUMNS(widget);
req->width = columns_compute_width(cols, columns_gtk2_get_width);
req->height = columns_compute_height(cols, columns_gtk2_get_height);
}
static void columns_size_allocate(GtkWidget *widget, GtkAllocation *alloc)
{
Columns *cols;
ColumnsChild *child;
GList *children;
gint border;
g_return_if_fail(widget != NULL);
g_return_if_fail(IS_COLUMNS(widget));
g_return_if_fail(alloc != NULL);
cols = COLUMNS(widget);
gtk_widget_set_allocation(widget, alloc);
border = gtk_container_get_border_width(GTK_CONTAINER(cols));
columns_alloc_horiz(cols, alloc->width, columns_gtk2_get_width);
columns_alloc_vert(cols, alloc->height, columns_gtk2_get_height);
for (children = cols->children;
children && (child = children->data);
children = children->next) {
if (child->widget && gtk_widget_get_visible(child->widget)) {
GtkAllocation call;
call.x = alloc->x + border + child->x;
call.y = alloc->y + border + child->y;
call.width = child->w;
call.height = child->h;
gtk_widget_size_allocate(child->widget, &call);
}
}
}
#else /* GTK_CHECK_VERSION(3,0,0) */
static gint columns_gtk3_get_min_width(ColumnsChild *child)
{
gint ret;
gtk_widget_get_preferred_width(child->widget, &ret, NULL);
return ret;
}
static gint columns_gtk3_get_nat_width(ColumnsChild *child)
{
gint ret;
if ((GTK_IS_LABEL(child->widget) &&
gtk_label_get_line_wrap(GTK_LABEL(child->widget))) ||
GTK_IS_ENTRY(child->widget)) {
/*
* We treat wrapping GtkLabels as a special case in this
* layout class, because the whole point of those is that I
* _don't_ want them to take up extra horizontal space for
* long text, but instead to wrap it to whatever size is used
* by the rest of the layout.
*
* GtkEntry gets similar treatment, because in OS X GTK I've
* found that it requests a natural width regardless of the
* output of gtk_entry_set_width_chars.
*/
gtk_widget_get_preferred_width(child->widget, &ret, NULL);
} else {
gtk_widget_get_preferred_width(child->widget, NULL, &ret);
}
return ret;
}
static gint columns_gtk3_get_minfh_width(ColumnsChild *child)
{
gint ret;
gtk_widget_get_preferred_width_for_height(child->widget, child->h,
&ret, NULL);
return ret;
}
static gint columns_gtk3_get_natfh_width(ColumnsChild *child)
{
gint ret;
gtk_widget_get_preferred_width_for_height(child->widget, child->h,
NULL, &ret);
return ret;
}
static gint columns_gtk3_get_min_height(ColumnsChild *child)
{
gint ret;
gtk_widget_get_preferred_height(child->widget, &ret, NULL);
return ret;
}
static gint columns_gtk3_get_nat_height(ColumnsChild *child)
{
gint ret;
gtk_widget_get_preferred_height(child->widget, NULL, &ret);
return ret;
}
static gint columns_gtk3_get_minfw_height(ColumnsChild *child)
{
gint ret;
gtk_widget_get_preferred_height_for_width(child->widget, child->w,
&ret, NULL);
return ret;
}
static gint columns_gtk3_get_natfw_height(ColumnsChild *child)
{
gint ret;
gtk_widget_get_preferred_height_for_width(child->widget, child->w,
NULL, &ret);
return ret;
}
static void columns_get_preferred_width(GtkWidget *widget,
gint *min, gint *nat)
{
Columns *cols;
g_return_if_fail(widget != NULL);
g_return_if_fail(IS_COLUMNS(widget));
cols = COLUMNS(widget);
if (min)
*min = columns_compute_width(cols, columns_gtk3_get_min_width);
if (nat)
*nat = columns_compute_width(cols, columns_gtk3_get_nat_width);
}
static void columns_get_preferred_height(GtkWidget *widget,
gint *min, gint *nat)
{
Columns *cols;
g_return_if_fail(widget != NULL);
g_return_if_fail(IS_COLUMNS(widget));
cols = COLUMNS(widget);
if (min)
*min = columns_compute_height(cols, columns_gtk3_get_min_height);
if (nat)
*nat = columns_compute_height(cols, columns_gtk3_get_nat_height);
}
static void columns_get_preferred_width_for_height(GtkWidget *widget,
gint height,
gint *min, gint *nat)
{
Columns *cols;
g_return_if_fail(widget != NULL);
g_return_if_fail(IS_COLUMNS(widget));
cols = COLUMNS(widget);
/* FIXME: which one should the get-height function here be? */
columns_alloc_vert(cols, height, columns_gtk3_get_nat_height);
if (min)
*min = columns_compute_width(cols, columns_gtk3_get_minfh_width);
if (nat)
*nat = columns_compute_width(cols, columns_gtk3_get_natfh_width);
}
static void columns_get_preferred_height_for_width(GtkWidget *widget,
gint width,
gint *min, gint *nat)
{
Columns *cols;
g_return_if_fail(widget != NULL);
g_return_if_fail(IS_COLUMNS(widget));
cols = COLUMNS(widget);
/* FIXME: which one should the get-height function here be? */
columns_alloc_horiz(cols, width, columns_gtk3_get_nat_width);
if (min)
*min = columns_compute_height(cols, columns_gtk3_get_minfw_height);
if (nat)
*nat = columns_compute_height(cols, columns_gtk3_get_natfw_height);
}
static void columns_size_allocate(GtkWidget *widget, GtkAllocation *alloc)
{
Columns *cols;
ColumnsChild *child;
GList *children;
gint border;
g_return_if_fail(widget != NULL);
g_return_if_fail(IS_COLUMNS(widget));
g_return_if_fail(alloc != NULL);
cols = COLUMNS(widget);
gtk_widget_set_allocation(widget, alloc);
border = gtk_container_get_border_width(GTK_CONTAINER(cols));
columns_alloc_horiz(cols, alloc->width, columns_gtk3_get_min_width);
columns_alloc_vert(cols, alloc->height, columns_gtk3_get_minfw_height);
for (children = cols->children;
children && (child = children->data);
children = children->next) {
if (child->widget && gtk_widget_get_visible(child->widget)) {
GtkAllocation call;
call.x = alloc->x + border + child->x;
call.y = alloc->y + border + child->y;
call.width = child->w;
call.height = child->h;
gtk_widget_size_allocate(child->widget, &call);
}
}
}
#endif