summaryrefslogtreecommitdiff
path: root/libjava/classpath/native/jni/gtk-peer/gnu_java_awt_peer_gtk_GtkScrollbarPeer.c
diff options
context:
space:
mode:
Diffstat (limited to 'libjava/classpath/native/jni/gtk-peer/gnu_java_awt_peer_gtk_GtkScrollbarPeer.c')
-rw-r--r--libjava/classpath/native/jni/gtk-peer/gnu_java_awt_peer_gtk_GtkScrollbarPeer.c296
1 files changed, 296 insertions, 0 deletions
diff --git a/libjava/classpath/native/jni/gtk-peer/gnu_java_awt_peer_gtk_GtkScrollbarPeer.c b/libjava/classpath/native/jni/gtk-peer/gnu_java_awt_peer_gtk_GtkScrollbarPeer.c
new file mode 100644
index 000000000..64d91d2b2
--- /dev/null
+++ b/libjava/classpath/native/jni/gtk-peer/gnu_java_awt_peer_gtk_GtkScrollbarPeer.c
@@ -0,0 +1,296 @@
+/* gtkscrollbarpeer.c -- Native implementation of GtkScrollbarPeer
+ Copyright (C) 1998, 1999, 2006 Free Software Foundation, Inc.
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU Classpath 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
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING. If not, write to the
+Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library. Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module. An independent module is a module which is not derived from
+or based on this library. If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so. If you do not wish to do so, delete this
+exception statement from your version. */
+
+
+#include <math.h>
+#include "gtkpeer.h"
+#include "gnu_java_awt_peer_gtk_GtkComponentPeer.h"
+#include "gnu_java_awt_peer_gtk_GtkScrollbarPeer.h"
+
+#define AWT_ADJUSTMENT_UNIT_INCREMENT 1
+#define AWT_ADJUSTMENT_UNIT_DECREMENT 2
+#define AWT_ADJUSTMENT_BLOCK_DECREMENT 3
+#define AWT_ADJUSTMENT_BLOCK_INCREMENT 4
+#define AWT_ADJUSTMENT_TRACK 5
+
+static jmethodID postAdjustmentEventID;
+static GtkWidget *scrollbar_get_widget (GtkWidget *widget);
+
+void
+cp_gtk_scrollbar_init_jni (void)
+{
+ jclass gtkscrollbarpeer;
+
+ gtkscrollbarpeer = (*cp_gtk_gdk_env())->FindClass (cp_gtk_gdk_env(),
+ "gnu/java/awt/peer/gtk/GtkScrollbarPeer");
+
+ postAdjustmentEventID = (*cp_gtk_gdk_env())->GetMethodID (cp_gtk_gdk_env(),
+ gtkscrollbarpeer,
+ "postAdjustmentEvent",
+ "(II)V");
+}
+
+#if GTK_MINOR_VERSION > 4
+static gboolean slider_moved_cb (GtkRange *range,
+ GtkScrollType scroll,
+ gdouble value,
+ jobject obj);
+#else
+static void post_change_event_cb (GtkRange *range,
+ jobject peer);
+#endif
+
+JNIEXPORT void JNICALL
+Java_gnu_java_awt_peer_gtk_GtkScrollbarPeer_create
+ (JNIEnv *env, jobject obj, jint orientation, jint value,
+ jint min, jint max, jint step_incr, jint page_incr, jint visible_amount)
+{
+ GtkWidget *scrollbar;
+ GtkWidget *eventbox;
+ GtkObject *adj;
+
+ /* Create global reference and save it for future use */
+ gtkpeer_set_global_ref (env, obj);
+
+ gdk_threads_enter ();
+
+ /* A little hack because gtk_range_set_range() doesn't allow min == max. */
+ if (min == max)
+ {
+ if (visible_amount == 0)
+ visible_amount = 1;
+ max++;
+ }
+
+ adj = gtk_adjustment_new ((gdouble) value,
+ (gdouble) min,
+ (gdouble) max,
+ (gdouble) step_incr,
+ (gdouble) page_incr,
+ (gdouble) visible_amount);
+
+ scrollbar = orientation
+ ? gtk_vscrollbar_new (GTK_ADJUSTMENT (adj))
+ : gtk_hscrollbar_new (GTK_ADJUSTMENT (adj));
+ eventbox = gtk_event_box_new ();
+ gtk_container_add (GTK_CONTAINER (eventbox), scrollbar);
+ gtk_widget_show (scrollbar);
+
+ GTK_RANGE (scrollbar)->round_digits = 0;
+ /* These calls seem redundant but they are not. They clamp values
+ so that the slider's entirety is always between the two
+ steppers. */
+ gtk_range_set_range (GTK_RANGE (scrollbar), (gdouble) min, (gdouble) max);
+ gtk_range_set_value (GTK_RANGE (scrollbar), (gdouble) value);
+
+ gdk_threads_leave ();
+
+ gtkpeer_set_widget (env, obj, eventbox);
+}
+
+JNIEXPORT void JNICALL
+Java_gnu_java_awt_peer_gtk_GtkScrollbarPeer_connectSignals
+ (JNIEnv *env, jobject obj)
+{
+ void *ptr = gtkpeer_get_widget (env, obj);
+ GtkWidget *wid = scrollbar_get_widget (GTK_WIDGET (ptr));
+ jobject gref = gtkpeer_get_global_ref (env, obj);
+ g_assert (gref);
+
+ gdk_threads_enter ();
+
+ /* Scrollbar signals */
+#if GTK_MINOR_VERSION > 4
+ g_signal_connect (G_OBJECT (wid), "change-value",
+ G_CALLBACK (slider_moved_cb), gref);
+#else
+ g_signal_connect (G_OBJECT (wid), "value-changed",
+ G_CALLBACK (post_change_event_cb), gref);
+#endif
+
+ /* Component signals */
+ cp_gtk_component_connect_signals (G_OBJECT (wid), gref);
+
+ gdk_threads_leave ();
+}
+
+JNIEXPORT void JNICALL
+Java_gnu_java_awt_peer_gtk_GtkScrollbarPeer_setLineIncrement
+ (JNIEnv *env, jobject obj, jint amount)
+{
+ void *ptr;
+ GtkAdjustment *adj;
+ GtkWidget *wid;
+
+ ptr = gtkpeer_get_widget (env, obj);
+ wid = scrollbar_get_widget (GTK_WIDGET (ptr));
+
+ gdk_threads_enter ();
+
+ adj = gtk_range_get_adjustment (GTK_RANGE (wid));
+ adj->step_increment = (gdouble) amount;
+ gtk_adjustment_changed (adj);
+
+ gdk_threads_leave ();
+}
+
+JNIEXPORT void JNICALL
+Java_gnu_java_awt_peer_gtk_GtkScrollbarPeer_setPageIncrement
+ (JNIEnv *env, jobject obj, jint amount)
+{
+ void *ptr;
+ GtkAdjustment *adj;
+ GtkWidget *wid;
+
+ ptr = gtkpeer_get_widget (env, obj);
+ wid = scrollbar_get_widget (GTK_WIDGET (ptr));
+
+ gdk_threads_enter ();
+
+ adj = gtk_range_get_adjustment (GTK_RANGE (wid));
+ adj->page_increment = (gdouble) amount;
+ gtk_adjustment_changed (adj);
+
+ gdk_threads_leave ();
+}
+
+JNIEXPORT void JNICALL
+Java_gnu_java_awt_peer_gtk_GtkScrollbarPeer_setBarValues
+ (JNIEnv *env, jobject obj, jint value, jint visible, jint min, jint max)
+{
+ void *ptr;
+ GtkAdjustment *adj;
+ GtkWidget *wid;
+
+ ptr = gtkpeer_get_widget (env, obj);
+ wid = scrollbar_get_widget (GTK_WIDGET (ptr));
+
+ gdk_threads_enter ();
+
+ /* A little hack because gtk_range_set_range() doesn't allow min == max. */
+ if (min == max)
+ {
+ if (visible == 0)
+ visible = 1;
+ max++;
+ }
+
+ adj = gtk_range_get_adjustment (GTK_RANGE (wid));
+ adj->page_size = (gdouble) visible;
+
+ gtk_range_set_range (GTK_RANGE (wid), (gdouble) min, (gdouble) max);
+ gtk_range_set_value (GTK_RANGE (wid), (gdouble) value);
+
+ gdk_threads_leave ();
+}
+
+#if GTK_MINOR_VERSION > 4
+static gboolean
+slider_moved_cb (GtkRange *range,
+ GtkScrollType scroll,
+ gdouble value,
+ jobject obj)
+{
+ GtkAdjustment *adj = gtk_range_get_adjustment (GTK_RANGE (range));
+
+ value = CLAMP (value, adj->lower,
+ (adj->upper - adj->page_size));
+
+ if (range->round_digits >= 0)
+ {
+ gdouble power;
+ gint i;
+
+ i = range->round_digits;
+ power = 1;
+ while (i--)
+ power *= 10;
+
+ value = floor ((value * power) + 0.5) / power;
+ }
+
+ switch (scroll)
+ {
+ case GTK_SCROLL_STEP_BACKWARD:
+ (*cp_gtk_gdk_env())->CallVoidMethod (cp_gtk_gdk_env(), obj, postAdjustmentEventID,
+ AWT_ADJUSTMENT_UNIT_DECREMENT,
+ (jint) value);
+ break;
+ case GTK_SCROLL_STEP_FORWARD:
+ (*cp_gtk_gdk_env())->CallVoidMethod (cp_gtk_gdk_env(), obj, postAdjustmentEventID,
+ AWT_ADJUSTMENT_UNIT_INCREMENT,
+ (jint) value);
+ break;
+ case GTK_SCROLL_PAGE_BACKWARD:
+ (*cp_gtk_gdk_env())->CallVoidMethod (cp_gtk_gdk_env(), obj, postAdjustmentEventID,
+ AWT_ADJUSTMENT_BLOCK_DECREMENT,
+ (jint) value);
+ break;
+ case GTK_SCROLL_PAGE_FORWARD:
+ (*cp_gtk_gdk_env())->CallVoidMethod (cp_gtk_gdk_env(), obj, postAdjustmentEventID,
+ AWT_ADJUSTMENT_BLOCK_INCREMENT,
+ (jint) value);
+ break;
+ default:
+ /* GTK_SCROLL_JUMP: */
+ (*cp_gtk_gdk_env())->CallVoidMethod (cp_gtk_gdk_env(), obj, postAdjustmentEventID,
+ AWT_ADJUSTMENT_TRACK,
+ (jint) value);
+ break;
+ }
+ return FALSE;
+}
+#else
+static void
+post_change_event_cb (GtkRange *range, jobject peer)
+{
+ GtkAdjustment *adj;
+ adj = gtk_range_get_adjustment (range);
+ (*cp_gtk_gdk_env())->CallVoidMethod (cp_gtk_gdk_env(), peer, postAdjustmentEventID,
+ AWT_ADJUSTMENT_TRACK, (jint) adj->value);
+}
+#endif
+
+static GtkWidget *
+scrollbar_get_widget (GtkWidget *widget)
+{
+ GtkWidget *wid;
+ g_assert (GTK_IS_EVENT_BOX (widget));
+ wid = gtk_bin_get_child (GTK_BIN(widget));
+
+ return wid;
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-08 06:21:14 +0000