transparency Q

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  • Martin Williams
    #1

    transparency Q

    I used the example on Bob Powell's site to draw a gradient on the background
    of the parent form in my survey app. Now, I would like to have a logo
    docked in the corner, but have the background of the logo be the gradient,
    not the base color of the window. The logo is a gif set with a transparent
    color. Any suggestions?


    Tags: None
    • Herfried K. Wagner [MVP]
      #2
      Re: transparency Q

      "Martin Williams" <wildstar@nospa m.net> schrieb;[color=blue]
      > Now, I would like to have a logo
      > docked in the corner, but have the background of the logo be the gradient,
      > not the base color of the window. The logo is a gif set with a
      > transparent
      > color.[/color]

      Instead of putting a pixturebox onto the form, use the 'Graphics' object's
      'DrawImage' method to draw the image on top of the gradient (similar to
      drawing the gradient). You can use 'Image.FromFile ' to load an image from
      disk, .NET will draw the image transparently automatically.

      --
      M S Herfried K. Wagner
      M V P <URL:http://dotnet.mvps.org/>
      V B <URL:http://dotnet.mvps.org/dotnet/faqs/>

        Comment

        • Martin Williams
          #3
          Re: transparency Q

          thanks, that did it. But, I have another Q...

          On the last form of the survey, there are some textboxes. When the form is
          activated, I set the focus to the "Finish" button to avoid seeing the
          insertion point in the textbox right away. However, when I tab through the
          controls, that first press of the tab button causes a momentary flicker on
          the screen, then it goes away. Any idea on what causes that?


          "Herfried K. Wagner [MVP]" <hirf-spam-me-here@gmx.at> wrote in message
          news:%23EnPTCmB FHA.3820@TK2MSF TNGP11.phx.gbl. ..[color=blue]
          > "Martin Williams" <wildstar@nospa m.net> schrieb;[color=green]
          > > Now, I would like to have a logo
          > > docked in the corner, but have the background of the logo be the[/color][/color]
          gradient,[color=blue][color=green]
          > > not the base color of the window. The logo is a gif set with a
          > > transparent
          > > color.[/color]
          >
          > Instead of putting a pixturebox onto the form, use the 'Graphics' object's
          > 'DrawImage' method to draw the image on top of the gradient (similar to
          > drawing the gradient). You can use 'Image.FromFile ' to load an image from
          > disk, .NET will draw the image transparently automatically.
          >
          > --
          > M S Herfried K. Wagner
          > M V P <URL:http://dotnet.mvps.org/>
          > V B <URL:http://dotnet.mvps.org/dotnet/faqs/>
          >[/color]


            Comment

            • Martin Williams
              #4
              Re: transparency Q

              One more question - is there a way I can get the logo that was drawn with
              DrawImage to be in a relative position?

              "Martin Williams" <wildstar@nospa m.net> wrote in message
              news:COCdnQI1_5 5G0WHcRVn-gw@comcast.com. ..[color=blue]
              > thanks, that did it. But, I have another Q...
              >
              > On the last form of the survey, there are some textboxes. When the form[/color]
              is[color=blue]
              > activated, I set the focus to the "Finish" button to avoid seeing the
              > insertion point in the textbox right away. However, when I tab through[/color]
              the[color=blue]
              > controls, that first press of the tab button causes a momentary flicker on
              > the screen, then it goes away. Any idea on what causes that?
              >
              >
              > "Herfried K. Wagner [MVP]" <hirf-spam-me-here@gmx.at> wrote in message
              > news:%23EnPTCmB FHA.3820@TK2MSF TNGP11.phx.gbl. ..[color=green]
              > > "Martin Williams" <wildstar@nospa m.net> schrieb;[color=darkred]
              > > > Now, I would like to have a logo
              > > > docked in the corner, but have the background of the logo be the[/color][/color]
              > gradient,[color=green][color=darkred]
              > > > not the base color of the window. The logo is a gif set with a
              > > > transparent
              > > > color.[/color]
              > >
              > > Instead of putting a pixturebox onto the form, use the 'Graphics'[/color][/color]
              object's[color=blue][color=green]
              > > 'DrawImage' method to draw the image on top of the gradient (similar to
              > > drawing the gradient). You can use 'Image.FromFile ' to load an image[/color][/color]
              from[color=blue][color=green]
              > > disk, .NET will draw the image transparently automatically.
              > >
              > > --
              > > M S Herfried K. Wagner
              > > M V P <URL:http://dotnet.mvps.org/>
              > > V B <URL:http://dotnet.mvps.org/dotnet/faqs/>
              > >[/color]
              >
              >[/color]


                Comment

                • Herfried K. Wagner [MVP]
                  #5
                  Re: transparency Q

                  "Martin Williams" <wildstar@nospa m.net> schrieb:[color=blue]
                  > One more question - is there a way I can get the logo that was drawn with
                  > DrawImage to be in a relative position?[/color]

                  You will have to listen for the window's 'Resize' or 'SizeChanged' event and
                  call the form's/control's 'Invalidate' method there in order to repaint the
                  background.

                  --
                  M S Herfried K. Wagner
                  M V P <URL:http://dotnet.mvps.org/>
                  V B <URL:http://dotnet.mvps.org/dotnet/faqs/>

                    Comment

                    • Martin Williams
                      #6
                      Re: transparency Q

                      Thanks again!

                      "Herfried K. Wagner [MVP]" <hirf-spam-me-here@gmx.at> wrote in message
                      news:%23hp8%23J sBFHA.2104@TK2M SFTNGP14.phx.gb l...[color=blue]
                      > "Martin Williams" <wildstar@nospa m.net> schrieb:[color=green]
                      > > One more question - is there a way I can get the logo that was drawn[/color][/color]
                      with[color=blue][color=green]
                      > > DrawImage to be in a relative position?[/color]
                      >
                      > You will have to listen for the window's 'Resize' or 'SizeChanged' event[/color]
                      and[color=blue]
                      > call the form's/control's 'Invalidate' method there in order to repaint[/color]
                      the[color=blue]
                      > background.
                      >
                      > --
                      > M S Herfried K. Wagner
                      > M V P <URL:http://dotnet.mvps.org/>
                      > V B <URL:http://dotnet.mvps.org/dotnet/faqs/>
                      >[/color]


                        Comment

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