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putty/unix/gtkcols.c

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/*
* gtkcols.c - implementation of the `Columns' GTK layout container.
*/
#include "gtkcols.h"
#include <gtk/gtk.h>
static void columns_init(Columns *cols);
static void columns_class_init(ColumnsClass *klass);
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);
#if !GTK_CHECK_VERSION(2,0,0)
static gint columns_focus(GtkContainer *container, GtkDirectionType dir);
#endif
static GtkType columns_child_type(GtkContainer *container);
static void columns_size_request(GtkWidget *widget, GtkRequisition *req);
static void columns_size_allocate(GtkWidget *widget, GtkAllocation *alloc);
static GtkContainerClass *parent_class = NULL;
#if !GTK_CHECK_VERSION(2,0,0)
GtkType columns_get_type(void)
{
static GtkType 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
#if !GTK_CHECK_VERSION(2,0,0)
static gint (*columns_inherited_focus)(GtkContainer *container,
GtkDirectionType direction);
#endif
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
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
widget_class->size_request = columns_size_request;
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;
#if !GTK_CHECK_VERSION(2,0,0)
/* Save the previous value of this method. */
if (!columns_inherited_focus)
columns_inherited_focus = container_class->focus;
container_class->focus = columns_focus;
#endif
}
static void columns_init(Columns *cols)
{
GTK_WIDGET_SET_FLAGS(cols, GTK_NO_WINDOW);
cols->children = NULL;
cols->spacing = 0;
}
/*
* 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_FLAGS(cols, GTK_MAPPED);
for (children = cols->children;
children && (child = children->data);
children = children->next) {
if (child->widget &&
GTK_WIDGET_VISIBLE(child->widget) &&
!GTK_WIDGET_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_UNSET_FLAGS(cols, GTK_MAPPED);
for (children = cols->children;
children && (child = children->data);
children = children->next) {
if (child->widget &&
GTK_WIDGET_VISIBLE(child->widget) &&
GTK_WIDGET_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;
gboolean was_visible;
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;
was_visible = GTK_WIDGET_VISIBLE(widget);
gtk_widget_unparent(widget);
cols->children = g_list_remove_link(cols->children, children);
g_list_free(children);
g_free(child);
if (was_visible)
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);
#if GTK_CHECK_VERSION(2,0,0)
gtk_container_set_focus_chain(container, cols->taborder);
#endif
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 GtkType 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(child->parent == NULL);
childdata = g_new(ColumnsChild, 1);
childdata->widget = child;
childdata->colstart = colstart;
childdata->colspan = colspan;
childdata->force_left = FALSE;
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_CHECK_VERSION(2,0,0)
gtk_container_set_focus_chain(GTK_CONTAINER(cols), cols->taborder);
#endif
if (GTK_WIDGET_REALIZED(cols))
gtk_widget_realize(child);
if (GTK_WIDGET_VISIBLE(cols) && GTK_WIDGET_VISIBLE(child)) {
if (GTK_WIDGET_MAPPED(cols))
gtk_widget_map(child);
gtk_widget_queue_resize(child);
}
}
void columns_force_left_align(Columns *cols, GtkWidget *widget)
{
ColumnsChild *child;
GList *children;
g_return_if_fail(cols != NULL);
g_return_if_fail(IS_COLUMNS(cols));
g_return_if_fail(widget != NULL);
for (children = cols->children;
children && (child = children->data);
children = children->next) {
if (child->widget != widget)
continue;
child->force_left = TRUE;
if (GTK_WIDGET_VISIBLE(widget))
gtk_widget_queue_resize(GTK_WIDGET(cols));
break;
}
}
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);
#if GTK_CHECK_VERSION(2,0,0)
gtk_container_set_focus_chain(GTK_CONTAINER(cols), cols->taborder);
#endif
break;
}
}
#if !GTK_CHECK_VERSION(2,0,0)
/*
* Override GtkContainer's focus movement so the user can
* explicitly specify the tab order.
*/
static gint columns_focus(GtkContainer *container, GtkDirectionType dir)
{
Columns *cols;
GList *pos;
GtkWidget *focuschild;
g_return_val_if_fail(container != NULL, FALSE);
g_return_val_if_fail(IS_COLUMNS(container), FALSE);
cols = COLUMNS(container);
if (!GTK_WIDGET_DRAWABLE(cols) ||
!GTK_WIDGET_IS_SENSITIVE(cols))
return FALSE;
if (!GTK_WIDGET_CAN_FOCUS(container) &&
(dir == GTK_DIR_TAB_FORWARD || dir == GTK_DIR_TAB_BACKWARD)) {
focuschild = container->focus_child;
gtk_container_set_focus_child(container, 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_DRAWABLE(child) &&
GTK_IS_CONTAINER(child) &&
!GTK_WIDGET_HAS_FOCUS(child)) {
if (gtk_container_focus(GTK_CONTAINER(child), dir))
return TRUE;
}
}
} else if (GTK_WIDGET_DRAWABLE(child)) {
if (GTK_IS_CONTAINER(child)) {
if (gtk_container_focus(GTK_CONTAINER(child), dir))
return TRUE;
} else if (GTK_WIDGET_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(container, dir);
}
#endif
/*
* 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.
*/
static void columns_size_request(GtkWidget *widget, GtkRequisition *req)
{
Columns *cols;
ColumnsChild *child;
GList *children;
gint i, ncols, colspan, *colypos;
const gint *percentages;
static const gint onecol[] = { 100 };
g_return_if_fail(widget != NULL);
g_return_if_fail(IS_COLUMNS(widget));
g_return_if_fail(req != NULL);
cols = COLUMNS(widget);
req->width = 0;
req->height = cols->spacing;
ncols = 1;
colypos = g_new(gint, 1);
colypos[0] = 0;
percentages = onecol;
for (children = cols->children;
children && (child = children->data);
children = children->next) {
GtkRequisition creq;
if (!child->widget) {
/* Column reconfiguration. */
for (i = 1; i < ncols; i++) {
if (colypos[0] < colypos[i])
colypos[0] = colypos[i];
}
ncols = child->ncols;
percentages = child->percentages;
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_VISIBLE(child->widget))
continue;
gtk_widget_size_request(child->widget, &creq);
colspan = child->colspan ? child->colspan : ncols-child->colstart;
/*
* To compute width: we know that creq.width plus
* 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 = creq.width + cols->spacing;
/*
* Since creq is 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;
/*
* 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 (req->width < fullwid - cols->spacing)
req->width = fullwid - cols->spacing;
}
/*
* 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, and minus the
* padding it is also a lower bound on our own size
* request.
*/
{
int topy, boty;
topy = 0;
for (i = 0; i < colspan; i++) {
if (topy < colypos[child->colstart+i])
topy = colypos[child->colstart+i];
}
boty = topy + creq.height + cols->spacing;
for (i = 0; i < colspan; i++) {
colypos[child->colstart+i] = boty;
}
if (req->height < boty - cols->spacing)
req->height = boty - cols->spacing;
}
}
req->width += 2*GTK_CONTAINER(cols)->border_width;
req->height += 2*GTK_CONTAINER(cols)->border_width;
g_free(colypos);
}
static void columns_size_allocate(GtkWidget *widget, GtkAllocation *alloc)
{
Columns *cols;
ColumnsChild *child;
GList *children;
gint i, ncols, colspan, border, *colxpos, *colypos;
const gint *percentages;
static const gint onecol[] = { 100 };
g_return_if_fail(widget != NULL);
g_return_if_fail(IS_COLUMNS(widget));
g_return_if_fail(alloc != NULL);
cols = COLUMNS(widget);
widget->allocation = *alloc;
border = GTK_CONTAINER(cols)->border_width;
ncols = 1;
percentages = onecol;
/* 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] = alloc->width - 2*border + cols->spacing;
/* 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) {
GtkRequisition creq;
GtkAllocation call;
if (!child->widget) {
gint percent;
/* Column reconfiguration. */
for (i = 1; i < ncols; i++) {
if (colypos[0] < colypos[i])
colypos[0] = colypos[i];
}
ncols = child->ncols;
percentages = child->percentages;
colypos = g_renew(gint, colypos, ncols);
for (i = 1; i < ncols; i++)
colypos[i] = colypos[0];
colxpos = g_renew(gint, colxpos, ncols + 1);
colxpos[0] = 0;
percent = 0;
for (i = 0; i < ncols; i++) {
percent += percentages[i];
colxpos[i+1] = (((alloc->width - 2*border) + cols->spacing)
* percent / 100);
}
continue;
}
/* Only take visible widgets into account. */
if (!GTK_WIDGET_VISIBLE(child->widget))
continue;
gtk_widget_get_child_requisition(child->widget, &creq);
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.
*/
call.x = alloc->x + border + colxpos[child->colstart];
if (child->force_left)
call.width = creq.width;
else
call.width = (colxpos[child->colstart+colspan] -
colxpos[child->colstart] - cols->spacing);
/*
* 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 = 0;
for (i = 0; i < colspan; i++) {
if (topy < colypos[child->colstart+i])
topy = colypos[child->colstart+i];
}
call.y = alloc->y + border + topy;
call.height = creq.height;
boty = topy + creq.height + cols->spacing;
for (i = 0; i < colspan; i++) {
colypos[child->colstart+i] = boty;
}
}
gtk_widget_size_allocate(child->widget, &call);
}
g_free(colxpos);
g_free(colypos);
}
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