Home / Would it be helpful and popular to enjoy “Get” DDE cmd

Ma_Jordan

Hello guys,
I came across the Sumatra PDF not long ago. I find it short and fast, supporting multi formats of E books.

When many students and learners on the job are reading E books, there is a good chances that they need to take notes. Later on, they might like to review the books and navigate to pages against which notes were taken.

Sumatra PDF provides DDE commands, namely, Sync, Open, Goto, Page, SetView. These DDE cmds are to Set the SumatraPDF into some status. If there were Get cmds, like GetFileName, GetCurrentPate, GetCurrentView, we would be able to fetch these infos, when reading, and save them in professional notetaking app. In reviewing notes, we could use Set cmds to get to involved books,pages and views. Even many notetaking apps already have bookmarks for PDF pages, I stil decide that SumatraPDF will link many writing apps to E books and become more satisfying, by providing “Get” DDE commands.

What do you think?

BRs
Jordan Ma

GitHubRulesOK

As discussed I am not a developer so can only say there is a newer DDE command for [search]
and there are open requests for similar extensions

github.com/sumatrapdfreader/sumatrapdf

Get mouse X Y position in document canvas pt units via SendMessage

opened 11:14PM - 15 Jan 20 UTC

nod5

**Request:** Add method for external programs to get the document canvas X Y pos…ition under the mouse cursor in pt unit (same unit that .smx files use for highlights) via SendMessage. **Why:** External programs can use the X Y data to interact with annotations under the mouse by parsing the .smx file. Possible use cases: Detect click on annotation or mouse-over annotation. React by adding/removing annotation, change annotation color/style, ... **What is already possible:** We can send key "m" to make SumatraPDF show a small cursor position helper notification in the top left corner of the document. Then repeat "m" until the notification shows pt units. Then continually parse the text from that control as the mouse cursor moves. That's what I do in sumatra_highlight_helper. Works, but can miss highlights if the mouse moves rapidly. And not silent because of the notification. **Code for illustration/discussion:** Below is my hacky attempt to add this to SumatraPDF. Compiles and works silently without issues so far in my own very limited tests. It seems this method can read the position more quickly compared to the old method above. **Gist with code to add to two SumatraPDF source files.** https://gist.github.com/nod5/ff6f78e9c16e5dfc9442ad607c120234 Tested on SumatraPDF source from 2020-01-15. **Overview:** The added code makes SumatraPDF listen for a new wm_command message and react by sending back canvas X Y position under mouse cursor as that message's return LRESULT data. The passed X Y data is two numbers with up to 4 digits each so will fit packed in the LRESULT. No extra WM_COPYDATA step needed. I assumed a gist was best when only discussing the topic. Can make a PR if asked, but assume my code needs changes. **Partly related issue:** #884 on error in position notification data in FixedUI .epub (or at least mismatch with data in .smx)

github.com/sumatrapdfreader/sumatrapdf

Callback messages to host application when in plugin mode

opened 08:36PM - 06 Apr 21 UTC

closed 03:41AM - 06 May 21 UTC

marcoscmonteiro

I embedding the sumatrapdf in my Windows Forms application using command line -p…lugin parameter. I did it successful so I can control SumatraPDF sending basic DDE commands from host application. But now I need to increase functionalities of my host application through sending callback messages from SumatraPDF when things like page change, zoom change or menu context occurs. I did not found any means of do that even in pre-releases versions. So, I know some of C and a little of C++ and trying to program this to submit in a future pull request. For now I program an generic Callback plugin function and calling it from some points of SumatraPDF code: ``` /* Auxiliary function to callback Plugin Host Window with a generic message */ LRESULT PluginHostCallback(WCHAR* msg, ...) { if (gPluginMode) { CrashIf(gWindows.IsEmpty()); if (gWindows.IsEmpty()) return 0; HWND plugin = gWindows.at(0)->hwndFrame; HWND Parent = GetAncestor(plugin, GA_PARENT); if (!Parent) return 0; // Format msg string with argment list va_list args; va_start(args, msg); ScopedMem<WCHAR> MsgStr0(str::FmtV(msg, args)); va_end(args); // Converts msg to UTF8 strconv::StackWstrToUtf8 MsgStr = MsgStr0.Get(); // Prepare struct and send message to plugin Host Window COPYDATASTRUCT cds = {0x1 /* Message from SumatraPDF plugin */, (DWORD)str::Len(MsgStr), MsgStr.Get()}; return SendMessage(Parent, WM_COPYDATA, (WPARAM)plugin, (LPARAM)&cds); } return 0; } ``` And, for example, calling from: ``` void OnWindowContextMenu(WindowInfo* win, int x, int y) { DisplayModel* dm = win->AsFixed(); CrashIf(!dm); if (!dm) { return; } /* Sends a message to plugin host window telling Context Menu is opening and cancel if host app desire */ if (PluginHostCallback(L"OPEN_CONTEXTMENU(%d, %d)", x, y)==1) return; ... ``` Would the SumatraPDF most experienced programmers recommend another best approach for this?

Ma_Jordan

I read your replay
thanks for your info.