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authorElliot Lee <sopwith@src.gnome.org>1997-11-24 22:37:52 +0000
committerElliot Lee <sopwith@src.gnome.org>1997-11-24 22:37:52 +0000
commit9508b76bd2401b6b9e289b5c8ec9fc0e08909283 (patch)
tree53c88a9e5ac09e1a027e56df33bdaa66d670901b /gtk/gtkhscrollbar.c
downloadgtk+-9508b76bd2401b6b9e289b5c8ec9fc0e08909283.tar.gz
Initial revision
Diffstat (limited to 'gtk/gtkhscrollbar.c')
-rw-r--r--gtk/gtkhscrollbar.c383
1 files changed, 383 insertions, 0 deletions
diff --git a/gtk/gtkhscrollbar.c b/gtk/gtkhscrollbar.c
new file mode 100644
index 0000000000..9b757d406f
--- /dev/null
+++ b/gtk/gtkhscrollbar.c
@@ -0,0 +1,383 @@
+/* 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 "gtkhscrollbar.h"
+#include "gtksignal.h"
+#include "gdk/gdkkeysyms.h"
+
+
+#define EPSILON 0.01
+
+#define RANGE_CLASS(w) GTK_RANGE_CLASS (GTK_OBJECT (w)->klass)
+
+
+static void gtk_hscrollbar_class_init (GtkHScrollbarClass *klass);
+static void gtk_hscrollbar_init (GtkHScrollbar *hscrollbar);
+static void gtk_hscrollbar_realize (GtkWidget *widget);
+static void gtk_hscrollbar_size_allocate (GtkWidget *widget,
+ GtkAllocation *allocation);
+static void gtk_hscrollbar_draw_step_forw (GtkRange *range);
+static void gtk_hscrollbar_draw_step_back (GtkRange *range);
+static void gtk_hscrollbar_slider_update (GtkRange *range);
+static void gtk_hscrollbar_calc_slider_size (GtkHScrollbar *hscrollbar);
+static gint gtk_hscrollbar_trough_keys (GtkRange *range,
+ GdkEventKey *key,
+ GtkScrollType *scroll,
+ GtkTroughType *pos);
+
+
+guint
+gtk_hscrollbar_get_type ()
+{
+ static guint hscrollbar_type = 0;
+
+ if (!hscrollbar_type)
+ {
+ GtkTypeInfo hscrollbar_info =
+ {
+ "GtkHScrollbar",
+ sizeof (GtkHScrollbar),
+ sizeof (GtkHScrollbarClass),
+ (GtkClassInitFunc) gtk_hscrollbar_class_init,
+ (GtkObjectInitFunc) gtk_hscrollbar_init,
+ (GtkArgFunc) NULL,
+ };
+
+ hscrollbar_type = gtk_type_unique (gtk_scrollbar_get_type (), &hscrollbar_info);
+ }
+
+ return hscrollbar_type;
+}
+
+static void
+gtk_hscrollbar_class_init (GtkHScrollbarClass *class)
+{
+ GtkWidgetClass *widget_class;
+ GtkRangeClass *range_class;
+
+ widget_class = (GtkWidgetClass*) class;
+ range_class = (GtkRangeClass*) class;
+
+ widget_class->realize = gtk_hscrollbar_realize;
+ widget_class->size_allocate = gtk_hscrollbar_size_allocate;
+
+ range_class->draw_step_forw = gtk_hscrollbar_draw_step_forw;
+ range_class->draw_step_back = gtk_hscrollbar_draw_step_back;
+ range_class->slider_update = gtk_hscrollbar_slider_update;
+ range_class->trough_click = gtk_range_default_htrough_click;
+ range_class->trough_keys = gtk_hscrollbar_trough_keys;
+ range_class->motion = gtk_range_default_hmotion;
+}
+
+static void
+gtk_hscrollbar_init (GtkHScrollbar *hscrollbar)
+{
+ GtkWidget *widget;
+ GtkRequisition *requisition;
+
+ widget = GTK_WIDGET (hscrollbar);
+ GTK_WIDGET_SET_FLAGS (widget, GTK_CAN_FOCUS);
+ requisition = &widget->requisition;
+
+ requisition->width = (RANGE_CLASS (widget)->min_slider_size +
+ RANGE_CLASS (widget)->stepper_size +
+ RANGE_CLASS (widget)->stepper_slider_spacing +
+ widget->style->klass->xthickness) * 2;
+ requisition->height = (RANGE_CLASS (widget)->slider_width +
+ widget->style->klass->ythickness * 2);
+}
+
+GtkWidget*
+gtk_hscrollbar_new (GtkAdjustment *adjustment)
+{
+ GtkHScrollbar *hscrollbar;
+
+ hscrollbar = gtk_type_new (gtk_hscrollbar_get_type ());
+
+ if (!adjustment)
+ adjustment = (GtkAdjustment*) gtk_adjustment_new (0.0, 0.0, 0.0, 0.0, 0.0, 0.0);
+
+ gtk_range_set_adjustment (GTK_RANGE (hscrollbar), adjustment);
+
+ return GTK_WIDGET (hscrollbar);
+}
+
+
+static void
+gtk_hscrollbar_realize (GtkWidget *widget)
+{
+ GtkRange *range;
+ GdkWindowAttr attributes;
+ gint attributes_mask;
+
+ g_return_if_fail (widget != NULL);
+ g_return_if_fail (GTK_IS_HSCROLLBAR (widget));
+
+ GTK_WIDGET_SET_FLAGS (widget, GTK_REALIZED);
+ range = GTK_RANGE (widget);
+
+ attributes.x = widget->allocation.x;
+ attributes.y = widget->allocation.y + (widget->allocation.height - widget->requisition.height) / 2;
+ attributes.width = widget->allocation.width;
+ attributes.height = widget->requisition.height;
+ attributes.wclass = GDK_INPUT_OUTPUT;
+ attributes.window_type = GDK_WINDOW_CHILD;
+ attributes.visual = gtk_widget_get_visual (widget);
+ attributes.colormap = gtk_widget_get_colormap (widget);
+ attributes.event_mask = gtk_widget_get_events (widget);
+ attributes.event_mask |= (GDK_EXPOSURE_MASK |
+ GDK_BUTTON_PRESS_MASK |
+ GDK_BUTTON_RELEASE_MASK |
+ GDK_ENTER_NOTIFY_MASK |
+ GDK_LEAVE_NOTIFY_MASK);
+
+ attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL | GDK_WA_COLORMAP;
+ widget->window = gdk_window_new (widget->parent->window, &attributes, attributes_mask);
+ range->trough = widget->window;
+
+ attributes.x = widget->style->klass->xthickness;
+ attributes.y = widget->style->klass->ythickness;
+ attributes.width = RANGE_CLASS (widget)->stepper_size;
+ attributes.height = RANGE_CLASS (widget)->stepper_size;
+
+ range->step_back = gdk_window_new (range->trough, &attributes, attributes_mask);
+
+ attributes.x = (widget->allocation.width -
+ widget->style->klass->xthickness -
+ RANGE_CLASS (widget)->stepper_size);
+
+ range->step_forw = gdk_window_new (range->trough, &attributes, attributes_mask);
+
+ attributes.x = 0;
+ attributes.y = widget->style->klass->ythickness;
+ attributes.width = RANGE_CLASS (widget)->min_slider_size;
+ attributes.height = RANGE_CLASS (widget)->slider_width;
+ attributes.event_mask |= (GDK_BUTTON_MOTION_MASK |
+ GDK_POINTER_MOTION_HINT_MASK);
+
+ range->slider = gdk_window_new (range->trough, &attributes, attributes_mask);
+
+ gtk_hscrollbar_calc_slider_size (GTK_HSCROLLBAR (widget));
+ gtk_range_slider_update (GTK_RANGE (widget));
+
+ widget->style = gtk_style_attach (widget->style, widget->window);
+
+ gdk_window_set_user_data (range->trough, widget);
+ gdk_window_set_user_data (range->slider, widget);
+ gdk_window_set_user_data (range->step_forw, widget);
+ gdk_window_set_user_data (range->step_back, widget);
+
+ gtk_style_set_background (widget->style, range->trough, GTK_STATE_ACTIVE);
+ gtk_style_set_background (widget->style, range->slider, GTK_STATE_NORMAL);
+ gtk_style_set_background (widget->style, range->step_forw, GTK_STATE_ACTIVE);
+ gtk_style_set_background (widget->style, range->step_back, GTK_STATE_ACTIVE);
+
+ gdk_window_show (range->slider);
+ gdk_window_show (range->step_forw);
+ gdk_window_show (range->step_back);
+}
+
+static void
+gtk_hscrollbar_size_allocate (GtkWidget *widget,
+ GtkAllocation *allocation)
+{
+ GtkRange *range;
+
+ g_return_if_fail (widget != NULL);
+ g_return_if_fail (GTK_IS_HSCROLLBAR (widget));
+ g_return_if_fail (allocation != NULL);
+
+ widget->allocation = *allocation;
+ if (GTK_WIDGET_REALIZED (widget))
+ {
+ range = GTK_RANGE (widget);
+
+ gdk_window_move_resize (range->trough,
+ allocation->x,
+ allocation->y + (allocation->height - widget->requisition.height) / 2,
+ allocation->width, widget->requisition.height);
+ gdk_window_move_resize (range->step_back,
+ widget->style->klass->xthickness,
+ widget->style->klass->ythickness,
+ RANGE_CLASS (widget)->stepper_size,
+ widget->requisition.height - widget->style->klass->ythickness * 2);
+ gdk_window_move_resize (range->step_forw,
+ allocation->width - widget->style->klass->xthickness -
+ RANGE_CLASS (widget)->stepper_size,
+ widget->style->klass->ythickness,
+ RANGE_CLASS (widget)->stepper_size,
+ widget->requisition.height - widget->style->klass->ythickness * 2);
+ gdk_window_resize (range->slider,
+ RANGE_CLASS (widget)->min_slider_size,
+ widget->requisition.height - widget->style->klass->ythickness * 2);
+
+ gtk_range_slider_update (GTK_RANGE (widget));
+ }
+}
+
+static void
+gtk_hscrollbar_draw_step_forw (GtkRange *range)
+{
+ GtkStateType state_type;
+ GtkShadowType shadow_type;
+
+ g_return_if_fail (range != NULL);
+ g_return_if_fail (GTK_IS_HSCROLLBAR (range));
+
+ if (GTK_WIDGET_DRAWABLE (range))
+ {
+ if (range->in_child == RANGE_CLASS (range)->step_forw)
+ {
+ if (range->click_child == RANGE_CLASS (range)->step_forw)
+ state_type = GTK_STATE_ACTIVE;
+ else
+ state_type = GTK_STATE_PRELIGHT;
+ }
+ else
+ state_type = GTK_STATE_NORMAL;
+
+ if (range->click_child == RANGE_CLASS (range)->step_forw)
+ shadow_type = GTK_SHADOW_IN;
+ else
+ shadow_type = GTK_SHADOW_OUT;
+
+ gtk_draw_arrow (GTK_WIDGET (range)->style, range->step_forw,
+ state_type, shadow_type, GTK_ARROW_RIGHT,
+ TRUE, 0, 0, -1, -1);
+ }
+}
+
+static void
+gtk_hscrollbar_draw_step_back (GtkRange *range)
+{
+ GtkStateType state_type;
+ GtkShadowType shadow_type;
+
+ g_return_if_fail (range != NULL);
+ g_return_if_fail (GTK_IS_HSCROLLBAR (range));
+
+ if (GTK_WIDGET_DRAWABLE (range))
+ {
+ if (range->in_child == RANGE_CLASS (range)->step_back)
+ {
+ if (range->click_child == RANGE_CLASS (range)->step_back)
+ state_type = GTK_STATE_ACTIVE;
+ else
+ state_type = GTK_STATE_PRELIGHT;
+ }
+ else
+ state_type = GTK_STATE_NORMAL;
+
+ if (range->click_child == RANGE_CLASS (range)->step_back)
+ shadow_type = GTK_SHADOW_IN;
+ else
+ shadow_type = GTK_SHADOW_OUT;
+
+ gtk_draw_arrow (GTK_WIDGET (range)->style, range->step_back,
+ state_type, shadow_type, GTK_ARROW_LEFT,
+ TRUE, 0, 0, -1, -1);
+ }
+}
+
+static void
+gtk_hscrollbar_slider_update (GtkRange *range)
+{
+ g_return_if_fail (range != NULL);
+ g_return_if_fail (GTK_IS_HSCROLLBAR (range));
+
+ gtk_hscrollbar_calc_slider_size (GTK_HSCROLLBAR (range));
+ gtk_range_default_hslider_update (range);
+}
+
+static void
+gtk_hscrollbar_calc_slider_size (GtkHScrollbar *hscrollbar)
+{
+ GtkRange *range;
+ gint step_back_x;
+ gint step_back_width;
+ gint step_forw_x;
+ gint slider_width;
+ gint slider_height;
+ gint left, right;
+ gint width;
+
+ g_return_if_fail (hscrollbar != NULL);
+ g_return_if_fail (GTK_IS_HSCROLLBAR (hscrollbar));
+
+ if (GTK_WIDGET_REALIZED (hscrollbar))
+ {
+ range = GTK_RANGE (hscrollbar);
+
+ gdk_window_get_size (range->step_back, &step_back_width, NULL);
+ gdk_window_get_position (range->step_back, &step_back_x, NULL);
+ gdk_window_get_position (range->step_forw, &step_forw_x, NULL);
+
+ left = (step_back_x +
+ step_back_width +
+ RANGE_CLASS (hscrollbar)->stepper_slider_spacing);
+ right = step_forw_x - RANGE_CLASS (hscrollbar)->stepper_slider_spacing;
+ width = right - left;
+
+ if ((range->adjustment->page_size > 0) &&
+ (range->adjustment->lower != range->adjustment->upper))
+ {
+ if (range->adjustment->page_size >
+ (range->adjustment->upper - range->adjustment->lower))
+ range->adjustment->page_size = range->adjustment->upper - range->adjustment->lower;
+
+ width = (width * range->adjustment->page_size /
+ (range->adjustment->upper - range->adjustment->lower));
+
+ if (width < RANGE_CLASS (hscrollbar)->min_slider_size)
+ width = RANGE_CLASS (hscrollbar)->min_slider_size;
+ }
+
+ gdk_window_get_size (range->slider, &slider_width, &slider_height);
+
+ if (slider_width != width)
+ gdk_window_resize (range->slider, width, slider_height);
+ }
+}
+
+static gint
+gtk_hscrollbar_trough_keys(GtkRange *range,
+ GdkEventKey *key,
+ GtkScrollType *scroll,
+ GtkTroughType *pos)
+{
+ gint return_val = FALSE;
+ switch (key->keyval)
+ {
+ case GDK_Left:
+ return_val = TRUE;
+ *scroll = GTK_SCROLL_STEP_BACKWARD;
+ break;
+ case GDK_Right:
+ return_val = TRUE;
+ *scroll = GTK_SCROLL_STEP_FORWARD;
+ break;
+ case GDK_Home:
+ return_val = TRUE;
+ *pos = GTK_TROUGH_START;
+ break;
+ case GDK_End:
+ return_val = TRUE;
+ *pos = GTK_TROUGH_END;
+ break;
+ }
+ return return_val;
+}