X-Git-Url: http://git.code-monkey.de/?a=blobdiff_plain;f=pv%2Fview%2Fanalogsignal.cpp;h=106735567c78e11363a2c0d9cda6d750c0b1f937;hb=17c7f31c7bb674d5017a8de66a5816e34542abb8;hp=8f6027b7a52f990135fc54cbe0881b93fc4d1c0a;hpb=430b94aaa74cbbbf805803a013b77a4d1e18daaf;p=pulseview.git

diff --git a/pv/view/analogsignal.cpp b/pv/view/analogsignal.cpp
index 8f6027b..1067355 100644
--- a/pv/view/analogsignal.cpp
+++ b/pv/view/analogsignal.cpp
@@ -608,13 +608,17 @@ void AnalogSignal::perform_autoranging(bool keep_divs, bool force_update)
 
  	// If there is still no positive div when we need it, add one
 	// (this can happen when pos_vdivs==neg_vdivs==0)
-	if ((max > 0) && (pos_vdivs_ == 0))
+	if ((max > 0) && (pos_vdivs_ == 0)) {
 		pos_vdivs_ = 1;
+		owner_->extents_changed(false, true);
+	}
 
 	// If there is still no negative div when we need it, add one
 	// (this can happen when pos_vdivs was 0 or 1 when trying to split)
-	if ((min < 0) && (neg_vdivs_ == 0))
+	if ((min < 0) && (neg_vdivs_ == 0)) {
 		neg_vdivs_ = 1;
+		owner_->extents_changed(false, true);
+	}
 
 	double min_value_per_div;
 	if ((pos_vdivs_ > 0) && (neg_vdivs_ >  0))
@@ -723,11 +727,8 @@ void AnalogSignal::on_samples_added()
 {
 	perform_autoranging(false, false);
 
-	if (owner_) {
-		// Call order is important, otherwise the lazy event handler won't work
-		owner_->extents_changed(false, true);
+	if (owner_)
 		owner_->row_item_appearance_changed(false, true);
-	}
 }
 
 void AnalogSignal::on_pos_vdivs_changed(int vdivs)
@@ -737,6 +738,13 @@ void AnalogSignal::on_pos_vdivs_changed(int vdivs)
 
 	pos_vdivs_ = vdivs;
 
+	// There has to be at least one div, positive or negative
+	if ((neg_vdivs_ == 0) && (pos_vdivs_ == 0)) {
+		pos_vdivs_ = 1;
+		if (pvdiv_sb_)
+			pvdiv_sb_->setValue(pos_vdivs_);
+	}
+
 	if (autoranging_) {
 		perform_autoranging(true, true);
 
@@ -761,6 +769,13 @@ void AnalogSignal::on_neg_vdivs_changed(int vdivs)
 
 	neg_vdivs_ = vdivs;
 
+	// There has to be at least one div, positive or negative
+	if ((neg_vdivs_ == 0) && (pos_vdivs_ == 0)) {
+		pos_vdivs_ = 1;
+		if (pvdiv_sb_)
+			pvdiv_sb_->setValue(pos_vdivs_);
+	}
+
 	if (autoranging_) {
 		perform_autoranging(true, true);