diff options
Diffstat (limited to 'gtk/gtkviewport.c')
| -rw-r--r-- | gtk/gtkviewport.c | 616 |
1 files changed, 616 insertions, 0 deletions
diff --git a/gtk/gtkviewport.c b/gtk/gtkviewport.c new file mode 100644 index 0000000000..dfa00c4b08 --- /dev/null +++ b/gtk/gtkviewport.c @@ -0,0 +1,616 @@ +/* GTK - The GIMP Toolkit + * Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Library General Public + * License as published by the Free Software Foundation; either + * version 2 of the License, or (at your option) any later version. + * + * This library 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 + * Library General Public License for more details. + * + * You should have received a copy of the GNU Library General Public + * License along with this library; if not, write to the Free + * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + */ +#include "gtksignal.h" +#include "gtkviewport.h" + + +static void gtk_viewport_class_init (GtkViewportClass *klass); +static void gtk_viewport_init (GtkViewport *viewport); +static void gtk_viewport_map (GtkWidget *widget); +static void gtk_viewport_unmap (GtkWidget *widget); +static void gtk_viewport_realize (GtkWidget *widget); +static void gtk_viewport_unrealize (GtkWidget *widget); +static void gtk_viewport_paint (GtkWidget *widget, + GdkRectangle *area); +static void gtk_viewport_draw (GtkWidget *widget, + GdkRectangle *area); +static gint gtk_viewport_expose (GtkWidget *widget, + GdkEventExpose *event); +static void gtk_viewport_size_request (GtkWidget *widget, + GtkRequisition *requisition); +static void gtk_viewport_size_allocate (GtkWidget *widget, + GtkAllocation *allocation); +static gint gtk_viewport_need_resize (GtkContainer *container); +static void gtk_viewport_adjustment_changed (GtkAdjustment *adjustment, + gpointer data); +static void gtk_viewport_adjustment_value_changed (GtkAdjustment *adjustment, + gpointer data); + + +guint +gtk_viewport_get_type () +{ + static guint viewport_type = 0; + + if (!viewport_type) + { + GtkTypeInfo viewport_info = + { + "GtkViewport", + sizeof (GtkViewport), + sizeof (GtkViewportClass), + (GtkClassInitFunc) gtk_viewport_class_init, + (GtkObjectInitFunc) gtk_viewport_init, + (GtkArgFunc) NULL, + }; + + viewport_type = gtk_type_unique (gtk_bin_get_type (), &viewport_info); + } + + return viewport_type; +} + +static void +gtk_viewport_class_init (GtkViewportClass *class) +{ + GtkWidgetClass *widget_class; + GtkContainerClass *container_class; + + widget_class = (GtkWidgetClass*) class; + container_class = (GtkContainerClass*) class; + + widget_class->map = gtk_viewport_map; + widget_class->unmap = gtk_viewport_unmap; + widget_class->realize = gtk_viewport_realize; + widget_class->unrealize = gtk_viewport_unrealize; + widget_class->draw = gtk_viewport_draw; + widget_class->expose_event = gtk_viewport_expose; + widget_class->size_request = gtk_viewport_size_request; + widget_class->size_allocate = gtk_viewport_size_allocate; + + container_class->need_resize = gtk_viewport_need_resize; +} + +static void +gtk_viewport_init (GtkViewport *viewport) +{ + GTK_WIDGET_UNSET_FLAGS (viewport, GTK_NO_WINDOW); + GTK_WIDGET_SET_FLAGS (viewport, GTK_BASIC); + + viewport->shadow_type = GTK_SHADOW_IN; + viewport->main_window = NULL; + viewport->view_window = NULL; + viewport->hadjustment = NULL; + viewport->vadjustment = NULL; +} + +GtkWidget* +gtk_viewport_new (GtkAdjustment *hadjustment, + GtkAdjustment *vadjustment) +{ + GtkViewport *viewport; + + viewport = gtk_type_new (gtk_viewport_get_type ()); + + if (!hadjustment) + hadjustment = (GtkAdjustment*) gtk_adjustment_new (0.0, 0.0, 0.0, 0.0, 0.0, 0.0); + + if (!vadjustment) + vadjustment = (GtkAdjustment*) gtk_adjustment_new (0.0, 0.0, 0.0, 0.0, 0.0, 0.0); + + gtk_viewport_set_hadjustment (viewport, hadjustment); + gtk_viewport_set_vadjustment (viewport, vadjustment); + + return GTK_WIDGET (viewport); +} + +GtkAdjustment* +gtk_viewport_get_hadjustment (GtkViewport *viewport) +{ + g_return_val_if_fail (viewport != NULL, NULL); + g_return_val_if_fail (GTK_IS_VIEWPORT (viewport), NULL); + + return viewport->hadjustment; +} + +GtkAdjustment* +gtk_viewport_get_vadjustment (GtkViewport *viewport) +{ + g_return_val_if_fail (viewport != NULL, NULL); + g_return_val_if_fail (GTK_IS_VIEWPORT (viewport), NULL); + + return viewport->vadjustment; +} + +void +gtk_viewport_set_hadjustment (GtkViewport *viewport, + GtkAdjustment *adjustment) +{ + g_return_if_fail (viewport != NULL); + g_return_if_fail (GTK_IS_VIEWPORT (viewport)); + g_return_if_fail (adjustment != NULL); + + if (viewport->hadjustment) + { + gtk_signal_disconnect_by_data (GTK_OBJECT (viewport->hadjustment), (gpointer) viewport); + gtk_object_unref (GTK_OBJECT (viewport->hadjustment)); + } + + viewport->hadjustment = adjustment; + gtk_object_ref (GTK_OBJECT (viewport->hadjustment)); + + gtk_signal_connect (GTK_OBJECT (adjustment), "changed", + (GtkSignalFunc) gtk_viewport_adjustment_changed, + (gpointer) viewport); + gtk_signal_connect (GTK_OBJECT (adjustment), "value_changed", + (GtkSignalFunc) gtk_viewport_adjustment_value_changed, + (gpointer) viewport); + + gtk_viewport_adjustment_changed (adjustment, (gpointer) viewport); +} + +void +gtk_viewport_set_vadjustment (GtkViewport *viewport, + GtkAdjustment *adjustment) +{ + g_return_if_fail (viewport != NULL); + g_return_if_fail (GTK_IS_VIEWPORT (viewport)); + g_return_if_fail (adjustment != NULL); + + if (viewport->vadjustment) + { + gtk_signal_disconnect_by_data (GTK_OBJECT (viewport->vadjustment), (gpointer) viewport); + gtk_object_unref (GTK_OBJECT (viewport->vadjustment)); + } + + viewport->vadjustment = adjustment; + gtk_object_ref (GTK_OBJECT (viewport->vadjustment)); + + gtk_signal_connect (GTK_OBJECT (adjustment), "changed", + (GtkSignalFunc) gtk_viewport_adjustment_changed, + (gpointer) viewport); + gtk_signal_connect (GTK_OBJECT (adjustment), "value_changed", + (GtkSignalFunc) gtk_viewport_adjustment_value_changed, + (gpointer) viewport); + + gtk_viewport_adjustment_changed (adjustment, (gpointer) viewport); +} + +void +gtk_viewport_set_shadow_type (GtkViewport *viewport, + GtkShadowType type) +{ + g_return_if_fail (viewport != NULL); + g_return_if_fail (GTK_IS_VIEWPORT (viewport)); + + if ((GtkShadowType) viewport->shadow_type != type) + { + viewport->shadow_type = type; + + if (GTK_WIDGET_VISIBLE (viewport)) + { + gtk_widget_size_allocate (GTK_WIDGET (viewport), &(GTK_WIDGET (viewport)->allocation)); + gtk_widget_queue_draw (GTK_WIDGET (viewport)); + } + } +} + + +static void +gtk_viewport_map (GtkWidget *widget) +{ + GtkViewport *viewport; + GtkBin *bin; + + g_return_if_fail (widget != NULL); + g_return_if_fail (GTK_IS_VIEWPORT (widget)); + + GTK_WIDGET_SET_FLAGS (widget, GTK_MAPPED); + viewport = GTK_VIEWPORT (widget); + bin = GTK_BIN (widget); + + gdk_window_show (viewport->main_window); + + if (bin->child && + GTK_WIDGET_VISIBLE (bin->child) && + !GTK_WIDGET_MAPPED (bin->child)) + gtk_widget_map (bin->child); +} + +static void +gtk_viewport_unmap (GtkWidget *widget) +{ + GtkViewport *viewport; + + g_return_if_fail (widget != NULL); + g_return_if_fail (GTK_IS_VIEWPORT (widget)); + + GTK_WIDGET_UNSET_FLAGS (widget, GTK_MAPPED); + viewport = GTK_VIEWPORT (widget); + + gdk_window_hide (viewport->main_window); +} + +static void +gtk_viewport_realize (GtkWidget *widget) +{ + GtkViewport *viewport; + GdkWindowAttr attributes; + GtkRequisition *child_requisition; + gint attributes_mask; + + g_return_if_fail (widget != NULL); + g_return_if_fail (GTK_IS_VIEWPORT (widget)); + + viewport = GTK_VIEWPORT (widget); + GTK_WIDGET_SET_FLAGS (widget, GTK_REALIZED); + + attributes.x = widget->allocation.x + GTK_CONTAINER (widget)->border_width; + attributes.y = widget->allocation.y + GTK_CONTAINER (widget)->border_width; + attributes.width = widget->allocation.width - GTK_CONTAINER (widget)->border_width * 2; + attributes.height = widget->allocation.height - GTK_CONTAINER (widget)->border_width * 2; + attributes.window_type = GDK_WINDOW_CHILD; + attributes.wclass = GDK_INPUT_OUTPUT; + attributes.visual = gtk_widget_get_visual (widget); + attributes.colormap = gtk_widget_get_colormap (widget); + attributes.event_mask = gtk_widget_get_events (widget) | GDK_EXPOSURE_MASK; + + attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL | GDK_WA_COLORMAP; + + viewport->main_window = gdk_window_new (widget->parent->window, &attributes, attributes_mask); + gdk_window_set_user_data (viewport->main_window, viewport); + + attributes.x += widget->style->klass->xthickness; + attributes.y += widget->style->klass->ythickness; + attributes.width -= widget->style->klass->xthickness * 2; + attributes.height -= widget->style->klass->ythickness * 2; + + viewport->view_window = gdk_window_new (viewport->main_window, &attributes, attributes_mask); + gdk_window_set_user_data (viewport->view_window, viewport); + + attributes.x = 0; + attributes.y = 0; + + if (GTK_BIN (viewport)->child) + { + child_requisition = >K_WIDGET (GTK_BIN (viewport)->child)->requisition; + attributes.width = child_requisition->width; + attributes.height = child_requisition->height; + } + + widget->window = gdk_window_new (viewport->view_window, &attributes, attributes_mask); + gdk_window_set_user_data (widget->window, viewport); + + widget->style = gtk_style_attach (widget->style, viewport->main_window); + gtk_style_set_background (widget->style, viewport->main_window, GTK_STATE_NORMAL); + gtk_style_set_background (widget->style, widget->window, GTK_STATE_NORMAL); + + gdk_window_show (widget->window); + gdk_window_show (viewport->view_window); +} + +static void +gtk_viewport_unrealize (GtkWidget *widget) +{ + GtkViewport *viewport; + + g_return_if_fail (widget != NULL); + g_return_if_fail (GTK_IS_VIEWPORT (widget)); + + viewport = GTK_VIEWPORT (widget); + GTK_WIDGET_UNSET_FLAGS (widget, GTK_REALIZED | GTK_MAPPED); + + gtk_style_detach (widget->style); + + gdk_window_destroy (widget->window); + gdk_window_destroy (viewport->view_window); + gdk_window_destroy (viewport->main_window); + + widget->window = NULL; + viewport->view_window = NULL; + viewport->main_window = NULL; +} + +static void +gtk_viewport_paint (GtkWidget *widget, + GdkRectangle *area) +{ + GtkViewport *viewport; + GtkStateType state; + gint x, y; + + g_return_if_fail (widget != NULL); + g_return_if_fail (GTK_IS_VIEWPORT (widget)); + g_return_if_fail (area != NULL); + + if (GTK_WIDGET_DRAWABLE (widget)) + { + viewport = GTK_VIEWPORT (widget); + + state = widget->state; + if (!GTK_WIDGET_IS_SENSITIVE (widget)) + state = GTK_STATE_INSENSITIVE; + + x = GTK_CONTAINER (viewport)->border_width; + y = GTK_CONTAINER (viewport)->border_width; + + gtk_draw_shadow (widget->style, viewport->main_window, + GTK_STATE_NORMAL, viewport->shadow_type, + 0, 0, -1, -1); + } +} + +static void +gtk_viewport_draw (GtkWidget *widget, + GdkRectangle *area) +{ + GtkViewport *viewport; + GtkBin *bin; + GdkRectangle tmp_area; + GdkRectangle child_area; + + g_return_if_fail (widget != NULL); + g_return_if_fail (GTK_IS_VIEWPORT (widget)); + g_return_if_fail (area != NULL); + + if (GTK_WIDGET_DRAWABLE (widget)) + { + viewport = GTK_VIEWPORT (widget); + bin = GTK_BIN (widget); + + gtk_viewport_paint (widget, area); + + if (bin->child) + { + tmp_area = *area; + tmp_area.x += viewport->hadjustment->value; + tmp_area.y += viewport->vadjustment->value; + + if (gtk_widget_intersect (bin->child, &tmp_area, &child_area)) + gtk_widget_draw (bin->child, &child_area); + } + } +} + +static gint +gtk_viewport_expose (GtkWidget *widget, + GdkEventExpose *event) +{ + GtkViewport *viewport; + GtkBin *bin; + GdkEventExpose child_event; + + g_return_val_if_fail (widget != NULL, FALSE); + g_return_val_if_fail (GTK_IS_VIEWPORT (widget), FALSE); + g_return_val_if_fail (event != NULL, FALSE); + + if (GTK_WIDGET_DRAWABLE (widget)) + { + viewport = GTK_VIEWPORT (widget); + bin = GTK_BIN (widget); + + if (event->window == viewport->main_window) + gtk_viewport_paint (widget, &event->area); + + child_event = *event; + if (bin->child && + GTK_WIDGET_NO_WINDOW (bin->child) && + gtk_widget_intersect (bin->child, &event->area, &child_event.area)) + gtk_widget_event (bin->child, (GdkEvent*) &child_event); + } + + return FALSE; +} + +static void +gtk_viewport_size_request (GtkWidget *widget, + GtkRequisition *requisition) +{ + GtkViewport *viewport; + GtkBin *bin; + + g_return_if_fail (widget != NULL); + g_return_if_fail (GTK_IS_VIEWPORT (widget)); + g_return_if_fail (requisition != NULL); + + viewport = GTK_VIEWPORT (widget); + bin = GTK_BIN (widget); + + requisition->width = (GTK_CONTAINER (widget)->border_width + + GTK_WIDGET (widget)->style->klass->xthickness) * 2 + 5; + + requisition->height = (GTK_CONTAINER (widget)->border_width * 2 + + GTK_WIDGET (widget)->style->klass->ythickness) * 2 + 5; + + if (bin->child && GTK_WIDGET_VISIBLE (bin->child)) + gtk_widget_size_request (bin->child, &bin->child->requisition); +} + +static void +gtk_viewport_size_allocate (GtkWidget *widget, + GtkAllocation *allocation) +{ + GtkViewport *viewport; + GtkBin *bin; + GtkAllocation child_allocation; + gint hval, vval; + + g_return_if_fail (widget != NULL); + g_return_if_fail (GTK_IS_VIEWPORT (widget)); + g_return_if_fail (allocation != NULL); + + widget->allocation = *allocation; + viewport = GTK_VIEWPORT (widget); + bin = GTK_BIN (widget); + + child_allocation.x = GTK_WIDGET (viewport)->style->klass->xthickness; + child_allocation.width = allocation->width - child_allocation.x * 2; + + child_allocation.y = GTK_WIDGET (viewport)->style->klass->ythickness; + child_allocation.height = allocation->height - child_allocation.y * 2; + + if (GTK_WIDGET_REALIZED (widget)) + { + gdk_window_move_resize (viewport->main_window, + allocation->x + GTK_CONTAINER (viewport)->border_width, + allocation->y + GTK_CONTAINER (viewport)->border_width, + allocation->width - GTK_CONTAINER (viewport)->border_width * 2, + allocation->height - GTK_CONTAINER (viewport)->border_width * 2); + + gdk_window_move_resize (viewport->view_window, + child_allocation.x, + child_allocation.y, + child_allocation.width, + child_allocation.height); + } + + viewport->hadjustment->page_size = child_allocation.width; + viewport->hadjustment->page_increment = viewport->hadjustment->page_size / 2; + viewport->hadjustment->step_increment = 10; + + viewport->vadjustment->page_size = child_allocation.height; + viewport->vadjustment->page_increment = viewport->vadjustment->page_size / 2; + viewport->vadjustment->step_increment = 10; + + hval = viewport->hadjustment->value; + vval = viewport->vadjustment->value; + + if (bin->child && GTK_WIDGET_VISIBLE (bin->child)) + { + viewport->hadjustment->lower = 0; + viewport->hadjustment->upper = MAX (bin->child->requisition.width, + child_allocation.width); + + hval = CLAMP (hval, 0, + viewport->hadjustment->upper - + viewport->hadjustment->page_size); + + viewport->vadjustment->lower = 0; + viewport->vadjustment->upper = MAX (bin->child->requisition.height, + child_allocation.height); + + vval = CLAMP (vval, 0, + viewport->vadjustment->upper - + viewport->vadjustment->page_size); + } + + if (bin->child && GTK_WIDGET_VISIBLE (bin->child)) + { + child_allocation.x = 0; + child_allocation.y = 0; + + child_allocation.width = viewport->hadjustment->upper; + child_allocation.height = viewport->vadjustment->upper; + + if (!GTK_WIDGET_REALIZED (widget)) + gtk_widget_realize (widget); + + gdk_window_resize (widget->window, + child_allocation.width, + child_allocation.height); + + child_allocation.x = 0; + child_allocation.y = 0; + gtk_widget_size_allocate (bin->child, &child_allocation); + } + + gtk_signal_emit_by_name (GTK_OBJECT (viewport->hadjustment), "changed"); + gtk_signal_emit_by_name (GTK_OBJECT (viewport->vadjustment), "changed"); + if (viewport->hadjustment->value != hval) + { + viewport->hadjustment->value = hval; + gtk_signal_emit_by_name (GTK_OBJECT (viewport->hadjustment), "value_changed"); + } + if (viewport->vadjustment->value != vval) + { + viewport->vadjustment->value = vval; + gtk_signal_emit_by_name (GTK_OBJECT (viewport->vadjustment), "value_changed"); + } +} + +static gint +gtk_viewport_need_resize (GtkContainer *container) +{ + GtkBin *bin; + + g_return_val_if_fail (container != NULL, FALSE); + g_return_val_if_fail (GTK_IS_VIEWPORT (container), FALSE); + + if (GTK_WIDGET_REALIZED (container)) + { + bin = GTK_BIN (container); + + gtk_widget_size_request (bin->child, &bin->child->requisition); + + gtk_widget_size_allocate (GTK_WIDGET (container), + &(GTK_WIDGET (container)->allocation)); + } + + return FALSE; +} + +static void +gtk_viewport_adjustment_changed (GtkAdjustment *adjustment, + gpointer data) +{ + GtkViewport *viewport; + + g_return_if_fail (adjustment != NULL); + g_return_if_fail (data != NULL); + g_return_if_fail (GTK_IS_VIEWPORT (data)); + + viewport = GTK_VIEWPORT (data); +} + +static void +gtk_viewport_adjustment_value_changed (GtkAdjustment *adjustment, + gpointer data) +{ + GtkViewport *viewport; + GtkBin *bin; + GtkAllocation child_allocation; + gint width, height; + + g_return_if_fail (adjustment != NULL); + g_return_if_fail (data != NULL); + g_return_if_fail (GTK_IS_VIEWPORT (data)); + + viewport = GTK_VIEWPORT (data); + bin = GTK_BIN (data); + + if (bin->child && GTK_WIDGET_VISIBLE (bin->child)) + { + gdk_window_get_size (viewport->view_window, &width, &height); + + child_allocation.x = 0; + child_allocation.y = 0; + + if (viewport->hadjustment->lower != (viewport->hadjustment->upper - + viewport->hadjustment->page_size)) + child_allocation.x = viewport->hadjustment->lower - viewport->hadjustment->value; + + if (viewport->vadjustment->lower != (viewport->vadjustment->upper - + viewport->vadjustment->page_size)) + child_allocation.y = viewport->vadjustment->lower - viewport->vadjustment->value; + + if (GTK_WIDGET_REALIZED (viewport)) + gdk_window_move (GTK_WIDGET (viewport)->window, + child_allocation.x, + child_allocation.y); + } +} |