PHP WinBinder: Alternative control 4
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| UniServer 5-Nano PHP WinBinder. |
Alternative control part 4
WinBinder has a few limitations most of which can be worked around. One limitation, there is no direct way to detect that an application has been restored from the tray menu.
However for our application this detection is required a servers status may have change while our application is minimised to the tray menu. For example a server may be closed from Apanel hence restoring our application requires buttons and indicators to be updated.
A crude method of perfuming this is to use a refresh button problem is when should a user press this button. This page shows how to detect when the application window regains focus. This allows the refresh button to be replaced with a more useful button.
Preliminary
I made copies of test_7.phpw and test_7.bat renamed them to test_8.phpw and test_8.bat respectively.
Batch file test_8.bat was edited to run test_8.phpw.
File test_8.phpw:
At the end of common variables section add
$focus_old = ""; // Stores caption of focus
At top of handler function add
global $focus_old;
Timer
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A timer was added providing a periodic tick, on each tick calls the handler function. Handler code checks it is a timer event and calls our main_timer() function. When starting or stopping the servers this function updates a progress indicator and server status. Handler code as shown on the right. |
Old handler if($id ==ID_APP_TIMER){ // 200ms tick
main_timer(); // Call main timer function
}
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New handler section
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This periodic tick provides an ideal solution for checking a controls focus. Function wb_get_focus() returns a handle to the window or control that has the keyboard focus. Function wb_get_text(handle) returns the text from a window, control, or control item. If it’s a window returns its caption (UniController) text. Variable $txt holds some text of a control currently in focus. $txt != $focus_old a new control is in focus. Is it our window. If it is call function main_init() Save the current focused control text in $focus_old |
New handler
// Main timer tick call other functions
if($id ==ID_APP_TIMER){ // 200ms tick
main_timer(); // Call main timer function
//Check focus
$txt = wb_get_text(wb_get_focus());// Get caption of control in focus
if($txt != $focus_old){ // Is it the same window or control in focus
if($txt == "UniController"){ //No: Is it our window app
main_init(); //Yes: Update button and indicators
}
$focus_old = $txt; // Save control in focus used for detecting a change
}
}//END timer tick
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Function main_init() is called only when the new focus is that of our window application. If the focus of a control has not changed there is nothing to do.
For testing add a line just below main_init() as shown below:
main_init(); //Yes: Update button and indicators wb_message_box($window, $txt,"FOCUS", WBC_WARNING); // Test Delete this test line
Test
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To see this functionality in action run test_8.bat Expected results
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Final
The above completes this tutorial I was going to leave it there and let you fill in the detail.
However thought better of it and decided a working reference would be better allowing you to change it as required.
I made copies of test_7b.phpw, test_8.phpw and test_8.bat renamed them test_9b.phpw, test_9.phpw and test_9_final.bat respectively.
Batch file: test_9_final.bat was modified to have the following content:
cd plugins\winbinder\alt_con_1 ..\php\php.exe -c ..\php\php-wb.ini test_9.phpw
This was moved to folder UniServer and runs the script test_9.phpw from there.
The batch file was then converted to an executable using Bat_To_Exe_Converter.exe.
Note: These two files (test_9_final.bat and test_9_final.exe) are included in folder UniServer\plugins\winbinder \alt_con_1 copy them to folder UniServer and run.
New window application
Script test_9b.phpw was converted into a real windows application changes the following server parameters:
- Appache listen port
- Apache ssl port
- MySQL listen port
- MySQL password
This script is run from the drop down menu where appropriate.
Summary
That essentially concludes this tutorial.
If the plugin is going to be used only for controlling the server it’s probably worth making a few minor modification explained on the next page.