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From 7db3fba25fe89240fa80661d81a5dffa2f31ff14 Mon Sep 17 00:00:00 2001
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From: Alexander Kurtakov
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Date: Mon, 12 Oct 2015 19:08:43 +0300
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Subject: Bug 479580 - Widgets with V_SCROLL not scrollable
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Hiding scrollbar for widget created with style V_SCROLL shouldn't stop
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other means of scrolling e.g. mouse wheel.
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The fix is to use new GTK_POLICY_EXTERNAL (added in GTK 3.16) which
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allows scrolling when scrollbars invisible which was not the possible
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before that.
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Change-Id: Icffb3c7792458369a7a7ee07dc317d83bf0757b2
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Signed-off-by: Alexander Kurtakov <akurtako@redhat.com>
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---
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.../Eclipse SWT PI/gtk/org/eclipse/swt/internal/gtk/OS.java | 1 +
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.../Eclipse SWT/gtk/org/eclipse/swt/widgets/Scrollable.java | 3 +++
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2 files changed, 4 insertions(+)
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diff --git a/eclipse.platform.swt/bundles/org.eclipse.swt/Eclipse SWT PI/gtk/org/eclipse/swt/internal/gtk/OS.java b/eclipse.platform.swt/bundles/org.eclipse.swt/Eclipse SWT PI/gtk/org/eclipse/swt/internal/gtk/OS.java
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index fe8283d..cf8cda6 100644
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--- a/eclipse.platform.swt/bundles/org.eclipse.swt/Eclipse SWT PI/gtk/org/eclipse/swt/internal/gtk/OS.java
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+++ b/eclipse.platform.swt/bundles/org.eclipse.swt/Eclipse SWT PI/gtk/org/eclipse/swt/internal/gtk/OS.java
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@@ -363,6 +363,7 @@ public class OS extends C {
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public static final int GTK_POLICY_ALWAYS = 0x0;
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public static final int GTK_POLICY_AUTOMATIC = 0x1;
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public static final int GTK_POLICY_NEVER = 0x2;
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+ public static final int GTK_POLICY_EXTERNAL = 0x3;
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public static final int GTK_POS_TOP = 0x2;
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public static final int GTK_POS_BOTTOM = 0x3;
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public static final int GTK_PRINT_CAPABILITY_PAGE_SET = 1 << 0;
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diff --git a/eclipse.platform.swt/bundles/org.eclipse.swt/Eclipse SWT/gtk/org/eclipse/swt/widgets/Scrollable.java b/eclipse.platform.swt/bundles/org.eclipse.swt/Eclipse SWT/gtk/org/eclipse/swt/widgets/Scrollable.java
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index 2d38a95..7295a27 100644
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--- a/eclipse.platform.swt/bundles/org.eclipse.swt/Eclipse SWT/gtk/org/eclipse/swt/widgets/Scrollable.java
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+++ b/eclipse.platform.swt/bundles/org.eclipse.swt/Eclipse SWT/gtk/org/eclipse/swt/widgets/Scrollable.java
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@@ -389,6 +389,9 @@ boolean setScrollBarVisible (ScrollBar bar, boolean visible) {
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int [] hsp = new int [1], vsp = new int [1];
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OS.gtk_scrolled_window_get_policy (scrolledHandle, hsp, vsp);
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int policy = visible ? OS.GTK_POLICY_ALWAYS : OS.GTK_POLICY_NEVER;
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+ if (OS.GTK_VERSION >= OS.VERSION(3, 16, 0) && !visible) {
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+ policy = OS.GTK_POLICY_EXTERNAL;
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+ }
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if ((bar.style & SWT.HORIZONTAL) != 0) {
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if (hsp [0] == policy) return false;
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hsp [0] = policy;
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--
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cgit v0.11.2-4-g4a35
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