Printer Driver UI Activation in Separate Process
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Solution Overview
Problem
Existing printer driver user interfaces are difficult to activate in a different process from the application process, leading to integration issues and user interface crashes, and require additional operations for users, which complicates inter-process communication and correct operation by the operating system.
Innovation Solution
An information processing apparatus that includes an acquisition unit to acquire an identifier from a printer driver setup file, an addition unit to add the identifier to driver information in a database, a writing unit to write the user interface application path and identifier, a determination unit to verify the identifier's registration, and an activation unit to activate the user interface application in a different process, allowing for independent operation of the user interface from the application process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the user interface of the printer driver is executed in the same process as the application, then intercommunication of print setting data is easy and the application and printer driver can be treated as integrated, but if the user interface crashes due to a defect, the application is also involved in the crash
Solution Approach 1:
The system divides the printer driver functionality into two separate processes: the printer driver process and the user interface application process. This segmentation allows the user interface to operate independently in a separate process space, preventing crashes from propagating to the application while maintaining communication through inter-process communication mechanisms.
2Reliability
If the user interface of the printer driver is activated in a different process from the application process, then crash propagation is prevented, but the operating system does not correctly operate when the printer driver adds the user interface as a sheet later
Solution Approach 1:
The operating system performs preliminary registration of the user interface application path and identifier in the driver information database during printer driver installation. This preliminary action ensures that when the user interface needs to be activated, the system can directly launch the pre-registered application without complex runtime determination, simplifying the activation process while maintaining reliability.
3Reliability
If another service is activated when the application calls the user interface, then the user interface can run in a different process, but it requires changes for all applications to cope with this calling method
Solution Approach 1:
The operating system implements a universal interface mechanism that allows any application to call the printer driver user interface without requiring application-specific modifications. The system provides standardized APIs and communication protocols that work across different applications, enabling the user interface to run independently in a separate process while maintaining broad compatibility.
Data Source
AI summary
A printer driver and an advanced UI application are associated with each other during installation, and the advanced UI application is activated in a different process using a COM when the printer driver is called.