forked from AuroraMiddleware/gtk
e2a5219220
history of the evolution of the changes involved. Most of this is actually minor painting tweaks.
398 lines
12 KiB
C
398 lines
12 KiB
C
/* GTK - The GIMP Toolkit
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* Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#include "gtkhscrollbar.h"
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#include "gtksignal.h"
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#include "gdk/gdkkeysyms.h"
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#define EPSILON 0.01
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#define RANGE_CLASS(w) GTK_RANGE_CLASS (GTK_OBJECT (w)->klass)
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static void gtk_hscrollbar_class_init (GtkHScrollbarClass *klass);
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static void gtk_hscrollbar_init (GtkHScrollbar *hscrollbar);
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static void gtk_hscrollbar_realize (GtkWidget *widget);
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static void gtk_hscrollbar_size_allocate (GtkWidget *widget,
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GtkAllocation *allocation);
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static void gtk_hscrollbar_draw_step_forw (GtkRange *range);
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static void gtk_hscrollbar_draw_step_back (GtkRange *range);
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static void gtk_hscrollbar_slider_update (GtkRange *range);
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static void gtk_hscrollbar_calc_slider_size (GtkHScrollbar *hscrollbar);
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static gint gtk_hscrollbar_trough_keys (GtkRange *range,
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GdkEventKey *key,
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GtkScrollType *scroll,
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GtkTroughType *pos);
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guint
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gtk_hscrollbar_get_type (void)
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{
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static guint hscrollbar_type = 0;
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if (!hscrollbar_type)
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{
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GtkTypeInfo hscrollbar_info =
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{
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"GtkHScrollbar",
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sizeof (GtkHScrollbar),
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sizeof (GtkHScrollbarClass),
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(GtkClassInitFunc) gtk_hscrollbar_class_init,
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(GtkObjectInitFunc) gtk_hscrollbar_init,
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/* reserved_1 */ NULL,
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/* reserved_2 */ NULL,
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(GtkClassInitFunc) NULL,
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};
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hscrollbar_type = gtk_type_unique (gtk_scrollbar_get_type (), &hscrollbar_info);
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}
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return hscrollbar_type;
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}
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static void
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gtk_hscrollbar_class_init (GtkHScrollbarClass *class)
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{
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GtkWidgetClass *widget_class;
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GtkRangeClass *range_class;
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widget_class = (GtkWidgetClass*) class;
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range_class = (GtkRangeClass*) class;
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widget_class->realize = gtk_hscrollbar_realize;
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widget_class->size_allocate = gtk_hscrollbar_size_allocate;
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range_class->draw_step_forw = gtk_hscrollbar_draw_step_forw;
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range_class->draw_step_back = gtk_hscrollbar_draw_step_back;
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range_class->slider_update = gtk_hscrollbar_slider_update;
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range_class->trough_click = gtk_range_default_htrough_click;
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range_class->trough_keys = gtk_hscrollbar_trough_keys;
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range_class->motion = gtk_range_default_hmotion;
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}
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static void
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gtk_hscrollbar_init (GtkHScrollbar *hscrollbar)
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{
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GtkWidget *widget;
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GtkRequisition *requisition;
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widget = GTK_WIDGET (hscrollbar);
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requisition = &widget->requisition;
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requisition->width = (RANGE_CLASS (widget)->min_slider_size +
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RANGE_CLASS (widget)->stepper_size +
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RANGE_CLASS (widget)->stepper_slider_spacing +
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widget->style->klass->xthickness) * 2;
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requisition->height = (RANGE_CLASS (widget)->slider_width +
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widget->style->klass->ythickness * 2);
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}
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GtkWidget*
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gtk_hscrollbar_new (GtkAdjustment *adjustment)
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{
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GtkHScrollbar *hscrollbar;
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hscrollbar = gtk_type_new (gtk_hscrollbar_get_type ());
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if (!adjustment)
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adjustment = (GtkAdjustment*) gtk_adjustment_new (0.0, 0.0, 0.0, 0.0, 0.0, 0.0);
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gtk_range_set_adjustment (GTK_RANGE (hscrollbar), adjustment);
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return GTK_WIDGET (hscrollbar);
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}
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static void
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gtk_hscrollbar_realize (GtkWidget *widget)
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{
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GtkRange *range;
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GdkWindowAttr attributes;
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gint attributes_mask;
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g_return_if_fail (widget != NULL);
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g_return_if_fail (GTK_IS_HSCROLLBAR (widget));
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GTK_WIDGET_SET_FLAGS (widget, GTK_REALIZED);
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range = GTK_RANGE (widget);
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attributes.x = widget->allocation.x;
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attributes.y = widget->allocation.y + (widget->allocation.height - widget->requisition.height) / 2;
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attributes.width = widget->allocation.width;
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attributes.height = widget->requisition.height;
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attributes.wclass = GDK_INPUT_OUTPUT;
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attributes.window_type = GDK_WINDOW_CHILD;
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attributes.visual = gtk_widget_get_visual (widget);
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attributes.colormap = gtk_widget_get_colormap (widget);
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attributes.event_mask = gtk_widget_get_events (widget);
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attributes.event_mask |= (GDK_EXPOSURE_MASK |
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GDK_BUTTON_PRESS_MASK |
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GDK_BUTTON_RELEASE_MASK |
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GDK_ENTER_NOTIFY_MASK |
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GDK_LEAVE_NOTIFY_MASK);
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attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL | GDK_WA_COLORMAP;
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widget->window = gdk_window_new (gtk_widget_get_parent_window (widget), &attributes, attributes_mask);
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range->trough = widget->window;
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gdk_window_ref (range->trough);
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attributes.x = widget->style->klass->xthickness;
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attributes.y = widget->style->klass->ythickness;
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attributes.width = RANGE_CLASS (widget)->stepper_size;
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attributes.height = RANGE_CLASS (widget)->stepper_size;
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range->step_back = gdk_window_new (range->trough, &attributes, attributes_mask);
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attributes.x = (widget->allocation.width -
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widget->style->klass->xthickness -
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RANGE_CLASS (widget)->stepper_size);
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range->step_forw = gdk_window_new (range->trough, &attributes, attributes_mask);
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attributes.x = 0;
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attributes.y = widget->style->klass->ythickness;
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attributes.width = RANGE_CLASS (widget)->min_slider_size;
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attributes.height = RANGE_CLASS (widget)->slider_width;
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attributes.event_mask |= (GDK_BUTTON_MOTION_MASK |
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GDK_POINTER_MOTION_HINT_MASK);
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range->slider = gdk_window_new (range->trough, &attributes, attributes_mask);
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gtk_hscrollbar_calc_slider_size (GTK_HSCROLLBAR (widget));
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gtk_range_slider_update (GTK_RANGE (widget));
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widget->style = gtk_style_attach (widget->style, widget->window);
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gdk_window_set_user_data (range->trough, widget);
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gdk_window_set_user_data (range->slider, widget);
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gdk_window_set_user_data (range->step_forw, widget);
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gdk_window_set_user_data (range->step_back, widget);
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gtk_style_set_background (widget->style, range->trough, GTK_STATE_ACTIVE);
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gtk_style_set_background (widget->style, range->slider, GTK_STATE_NORMAL);
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gtk_style_set_background (widget->style, range->step_forw, GTK_STATE_ACTIVE);
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gtk_style_set_background (widget->style, range->step_back, GTK_STATE_ACTIVE);
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gdk_window_show (range->slider);
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gdk_window_show (range->step_forw);
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gdk_window_show (range->step_back);
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}
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static void
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gtk_hscrollbar_size_allocate (GtkWidget *widget,
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GtkAllocation *allocation)
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{
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GtkRange *range;
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g_return_if_fail (widget != NULL);
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g_return_if_fail (GTK_IS_HSCROLLBAR (widget));
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g_return_if_fail (allocation != NULL);
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widget->allocation = *allocation;
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if (GTK_WIDGET_REALIZED (widget))
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{
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range = GTK_RANGE (widget);
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gdk_window_move_resize (range->trough,
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allocation->x,
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allocation->y + (allocation->height - widget->requisition.height) / 2,
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allocation->width, widget->requisition.height);
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gdk_window_move_resize (range->step_back,
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widget->style->klass->xthickness,
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widget->style->klass->ythickness,
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RANGE_CLASS (widget)->stepper_size,
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widget->requisition.height - widget->style->klass->ythickness * 2);
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gdk_window_move_resize (range->step_forw,
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allocation->width - widget->style->klass->xthickness -
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RANGE_CLASS (widget)->stepper_size,
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widget->style->klass->ythickness,
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RANGE_CLASS (widget)->stepper_size,
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widget->requisition.height - widget->style->klass->ythickness * 2);
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gdk_window_resize (range->slider,
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RANGE_CLASS (widget)->min_slider_size,
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widget->requisition.height - widget->style->klass->ythickness * 2);
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gtk_range_slider_update (GTK_RANGE (widget));
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}
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}
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static void
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gtk_hscrollbar_draw_step_forw (GtkRange *range)
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{
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GtkStateType state_type;
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GtkShadowType shadow_type;
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g_return_if_fail (range != NULL);
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g_return_if_fail (GTK_IS_HSCROLLBAR (range));
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if (GTK_WIDGET_DRAWABLE (range))
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{
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if (range->in_child == RANGE_CLASS (range)->step_forw)
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{
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if (range->click_child == RANGE_CLASS (range)->step_forw)
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state_type = GTK_STATE_ACTIVE;
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else
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state_type = GTK_STATE_PRELIGHT;
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}
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else
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state_type = GTK_STATE_NORMAL;
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if (range->click_child == RANGE_CLASS (range)->step_forw)
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shadow_type = GTK_SHADOW_IN;
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else
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shadow_type = GTK_SHADOW_OUT;
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gtk_paint_arrow (GTK_WIDGET (range)->style, range->step_forw,
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state_type, shadow_type,
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NULL, GTK_WIDGET (range), "hscrollbar",
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GTK_ARROW_RIGHT,
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TRUE, 0, 0, -1, -1);
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}
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}
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static void
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gtk_hscrollbar_draw_step_back (GtkRange *range)
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{
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GtkStateType state_type;
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GtkShadowType shadow_type;
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g_return_if_fail (range != NULL);
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g_return_if_fail (GTK_IS_HSCROLLBAR (range));
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if (GTK_WIDGET_DRAWABLE (range))
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{
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if (range->in_child == RANGE_CLASS (range)->step_back)
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{
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if (range->click_child == RANGE_CLASS (range)->step_back)
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state_type = GTK_STATE_ACTIVE;
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else
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state_type = GTK_STATE_PRELIGHT;
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}
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else
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state_type = GTK_STATE_NORMAL;
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if (range->click_child == RANGE_CLASS (range)->step_back)
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shadow_type = GTK_SHADOW_IN;
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else
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shadow_type = GTK_SHADOW_OUT;
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gtk_paint_arrow (GTK_WIDGET (range)->style, range->step_back,
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state_type, shadow_type,
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NULL, GTK_WIDGET (range), "hscrollbar",
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GTK_ARROW_LEFT,
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TRUE, 0, 0, -1, -1);
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}
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}
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static void
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gtk_hscrollbar_slider_update (GtkRange *range)
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{
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g_return_if_fail (range != NULL);
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g_return_if_fail (GTK_IS_HSCROLLBAR (range));
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gtk_hscrollbar_calc_slider_size (GTK_HSCROLLBAR (range));
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gtk_range_default_hslider_update (range);
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}
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static void
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gtk_hscrollbar_calc_slider_size (GtkHScrollbar *hscrollbar)
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{
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GtkRange *range;
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gint step_back_x;
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gint step_back_width;
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gint step_forw_x;
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gint slider_width;
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gint slider_height;
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gint left, right;
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gint width;
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g_return_if_fail (hscrollbar != NULL);
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g_return_if_fail (GTK_IS_HSCROLLBAR (hscrollbar));
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if (GTK_WIDGET_REALIZED (hscrollbar))
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{
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range = GTK_RANGE (hscrollbar);
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gdk_window_get_size (range->step_back, &step_back_width, NULL);
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gdk_window_get_position (range->step_back, &step_back_x, NULL);
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gdk_window_get_position (range->step_forw, &step_forw_x, NULL);
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left = (step_back_x +
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step_back_width +
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RANGE_CLASS (hscrollbar)->stepper_slider_spacing);
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right = step_forw_x - RANGE_CLASS (hscrollbar)->stepper_slider_spacing;
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width = right - left;
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if ((range->adjustment->page_size > 0) &&
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(range->adjustment->lower != range->adjustment->upper))
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{
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if (range->adjustment->page_size >
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(range->adjustment->upper - range->adjustment->lower))
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range->adjustment->page_size = range->adjustment->upper - range->adjustment->lower;
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width = (width * range->adjustment->page_size /
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(range->adjustment->upper - range->adjustment->lower));
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if (width < RANGE_CLASS (hscrollbar)->min_slider_size)
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width = RANGE_CLASS (hscrollbar)->min_slider_size;
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}
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gdk_window_get_size (range->slider, &slider_width, &slider_height);
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if (slider_width != width)
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gdk_window_resize (range->slider, width, slider_height);
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}
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}
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static gint
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gtk_hscrollbar_trough_keys(GtkRange *range,
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GdkEventKey *key,
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GtkScrollType *scroll,
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GtkTroughType *pos)
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{
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gint return_val = FALSE;
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switch (key->keyval)
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{
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case GDK_Left:
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return_val = TRUE;
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*scroll = GTK_SCROLL_STEP_BACKWARD;
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break;
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case GDK_Right:
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return_val = TRUE;
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*scroll = GTK_SCROLL_STEP_FORWARD;
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break;
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case GDK_Home:
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return_val = TRUE;
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if (key->state & GDK_CONTROL_MASK)
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*scroll = GTK_SCROLL_PAGE_BACKWARD;
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else
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*pos = GTK_TROUGH_START;
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break;
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case GDK_End:
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return_val = TRUE;
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if (key->state & GDK_CONTROL_MASK)
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*scroll = GTK_SCROLL_PAGE_FORWARD;
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else
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*pos = GTK_TROUGH_END;
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break;
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}
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return return_val;
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}
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