Fix ui fluctuations

Author: SinghRajenM

src/NppJsonViewer/JsonViewDlg.cpp

@@ -941,8 +941,9 @@ void JsonViewDlg::HandleZoomOnScroll(WPARAM wParam) const
     int pos   = GetZoomLevel();    // Current zoom level
     int delta = GET_WHEEL_DELTA_WPARAM(wParam);
 
-    const auto& zoomRange = m_pTreeViewZoom->GetRange();
-    const bool  isZoomIn    = delta > 0;
+    const auto& zoomRange  = m_pTreeViewZoom->GetRange();
+    const bool  isZoomIn   = delta > 0;
+    bool        bRefreshUI = true;
 
     if (isZoomIn && pos < zoomRange.m_nMaxZoom)
     {
@@ -952,8 +953,15 @@ void JsonViewDlg::HandleZoomOnScroll(WPARAM wParam) const
     {
         pos -= 10;    // Zoom out
     }
+    else
+    {
+        bRefreshUI = false;
+    }
 
-    UpdateUIOnZoom(pos);
+    if (bRefreshUI)
+    {
+        UpdateUIOnZoom(pos);
+    }
 }
 
 void JsonViewDlg::HandleTreeEvents(LPARAM lParam) const

src/NppJsonViewer/SliderCtrl.cpp

@@ -22,6 +22,7 @@ void SliderCtrl::OnInit(HWND hParent, int sliderID, int sliderInfoID)
     // Set slider range and initial position
     SendMessage(m_hSelf, TBM_SETRANGE, TRUE, MAKELPARAM(m_sliderRange.m_nMinZoom, m_sliderRange.m_nMaxZoom));
     SendMessage(m_hSelf, TBM_SETPOS, TRUE, m_sliderRange.m_nDefault);
+    SendMessage(m_hSelf, TBM_SETPAGESIZE, 0, m_sliderRange.m_nSteps);
 
     UpdateInfo(m_sliderRange.m_nDefault);
 

src/NppJsonViewer/SliderCtrl.h

@@ -9,6 +9,7 @@ struct SliderRange
     int m_nDefault = 100;
     int m_nMinZoom = 80;
     int m_nMaxZoom = 250;
+    int m_nSteps   = 10;
 };    // namespace SliderRange
 
 class SliderCtrl

src/NppJsonViewer/resource.rc

@@ -88,7 +88,7 @@ BEGIN
     CONTROL         "",IDC_DIVIDER,"Static",SS_ETCHEDVERT,56,1,2,16
     EDITTEXT        IDC_EDT_SEARCH,60,2,99,12,ES_AUTOHSCROLL
     PUSHBUTTON      "",IDC_BTN_SEARCH,160,2,16,12,BS_ICON
-    CONTROL         "",IDC_ZOOM_SLIDER,"msctls_trackbar32",TBS_AUTOTICKS | TBS_NOTICKS,2,16,58,12
+    CONTROL         "",IDC_ZOOM_SLIDER,"msctls_trackbar32",TBS_AUTOTICKS | TBS_BOTH | TBS_NOTICKS | WS_TABSTOP,2,16,58,12
     RTEXT           "100%",IDC_ZOOM_PERCENT,60,16,22,12,SS_NOTIFY | NOT WS_GROUP,WS_EX_RIGHT
     CONTROL         "",IDC_TREE,"SysTreeView32",TVS_HASBUTTONS | TVS_HASLINES | TVS_DISABLEDRAGDROP | TVS_SHOWSELALWAYS | TVS_FULLROWSELECT | WS_HSCROLL | WS_TABSTOP,2,30,173,264,WS_EX_CLIENTEDGE
     EDITTEXT        IDC_EDT_NODEPATH,2,296,173,12,ES_AUTOHSCROLL | ES_READONLY