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author | Elliot Lee <sopwith@src.gnome.org> | 1997-11-24 22:37:52 +0000 |
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committer | Elliot Lee <sopwith@src.gnome.org> | 1997-11-24 22:37:52 +0000 |
commit | 9508b76bd2401b6b9e289b5c8ec9fc0e08909283 (patch) | |
tree | 53c88a9e5ac09e1a027e56df33bdaa66d670901b /gtk/gtkhscrollbar.c | |
download | gtk+-9508b76bd2401b6b9e289b5c8ec9fc0e08909283.tar.gz |
Initial revision
Diffstat (limited to 'gtk/gtkhscrollbar.c')
-rw-r--r-- | gtk/gtkhscrollbar.c | 383 |
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; +} |