How to zoom in PdfPageView

[4-alok]

This is my code, and how do I implement pinch zoom?

                   PageView.builder(
                    physics: const BouncingScrollPhysics(),
                    controller: controller.pageController,
                    itemCount: document.pages.length,
                    onPageChanged: (i) => controller.currentPage.value = i,
                    itemBuilder: (context, index) => LayoutBuilder(
                          builder: (context, constraints) => Stack(
                            children: [
                              pdfrx.PdfPageView(
                                document: document,
                                pageNumber: index + 1,
                                maximumDpi: 300,
                                decorationBuilder:
                                    (context, pageSize, page, pageImage) {
                                  return Center(
                                      child: Container(child: pageImage));
                                },
                              ),
                              TextView(index: index)
                            ],
                          ),
                        )),

[fuadmostafij6]

Use InteractiveViewer

[4-alok]

Could u plz give an example

[fuadmostafij6]

   Listener(
  onPointerDown: (details) {
    if (details.kind ==
        PointerDeviceKind.touch) {
      fingersInteracting ++ ;
    }


  },
  onPointerUp: (details) {
    if (details.kind ==
        PointerDeviceKind.touch) {
      fingersInteracting = 0 ;
    }

  },
  onPointerCancel: (details) {
    if (details.kind ==
        PointerDeviceKind.touch) {
      fingersInteracting = 0 ;
    }
  },
  child: InteractiveViewer(
    clipBehavior: Clip.hardEdge,
    minScale: 1,
    maxScale: 3,
    panAxis: PanAxis.aligned,
    panEnabled: isScrollEnable,
    transformationController:
    transformationController,
    onInteractionUpdate: (details) {

    },
    onInteractionEnd: (details) {
  
    },
    child:
    Material(
      child: RepaintBoundary(
        child: PageView.builder(
          controller: pageController,
          physics: transformationController
              .value
              .getMaxScaleOnAxis() <=
              1.2 &&
              fingersInteracting <=
                  1 &&
              isScrollEnable
              ? const AlwaysScrollableScrollPhysics()
              : const NeverScrollableScrollPhysics(),
          onPageChanged: (value){
            updateCurrentPageNo(value+1);
          },
      

          itemCount:newThumbnailPaths.length,
       

          itemBuilder: (context, index) {
           return Container();
          },),
      ),
    );




    ),
  );

[4-alok]

ok thanks, now how do I select text in PageView