Feature #3483
Mis à jour par Sebastien Jacquot il y a presque 2 ans
Add some user global preferences to manage the printing or displaying dimensions/Megapixels of the bitmap files produced by the commands "Export\Chart..." and "Export view".
The UI should shows to the user what dimensions in centimeters will be optimum according to user selected width in pixels and DPI.
h3. Solution 1
*[SJ: WIP]*
Store a user preference "BimapPixelsWidth" at ChartsEngine level.
*In RCP preference page*
Set these writable fields:
* Pixels Width
integer field, default value: based on user screen?, max value: 10 000 px?
* DPI
list of values: 72, 150, 300, 400, 600?
Set these read-only writable fields:
* Width in centimeters
* Height in centimeters
When changing value of the "Pixels Width" field, compute width and height according to the width and the selected DPI and fill the fields "Width in centimeters" and "Height in centimeters".
*For command "Export view"*
The current behavior is to produced a file with the same dimensions of pixels than the chart windows pixels dimensions that is displayed on the screen. dimensions.
The height must be computed according to "Pixels Width" preference and the original chart windows aspect ratio.
*For command "Export\Chart..."*
The current behavior is to produced a file with pixels dimensions of 1024 x 576.
We can use the "Pixels Width" preference to manage the width exported file width but since we do not have a chart windows we can not compute a height based on the viewed chart.
Need to specify how to compute the height.
Using a "Pixels Height" preference doesn't seems to be the best solution.
A better solution may be to use the aspect ratio of the user screen resolution to compute the height.
*Mixed preference"*
If we use the same fields and preference page for the 2 commands, it may be confusing for the user.
Especially if we use a "Pixels Height" preference that should not be used by "Export view". The purpose of the "Pixels width" value when using this command is only to scale the entire image but not to change its aspect ration.
The UI should shows to the user what dimensions in centimeters will be optimum according to user selected width in pixels and DPI.
h3. Solution 1
*[SJ: WIP]*
Store a user preference "BimapPixelsWidth" at ChartsEngine level.
*In RCP preference page*
Set these writable fields:
* Pixels Width
integer field, default value: based on user screen?, max value: 10 000 px?
* DPI
list of values: 72, 150, 300, 400, 600?
Set these read-only writable fields:
* Width in centimeters
* Height in centimeters
When changing value of the "Pixels Width" field, compute width and height according to the width and the selected DPI and fill the fields "Width in centimeters" and "Height in centimeters".
*For command "Export view"*
The current behavior is to produced a file with the same dimensions of pixels than the chart windows pixels dimensions that is displayed on the screen. dimensions.
The height must be computed according to "Pixels Width" preference and the original chart windows aspect ratio.
*For command "Export\Chart..."*
The current behavior is to produced a file with pixels dimensions of 1024 x 576.
We can use the "Pixels Width" preference to manage the width exported file width but since we do not have a chart windows we can not compute a height based on the viewed chart.
Need to specify how to compute the height.
Using a "Pixels Height" preference doesn't seems to be the best solution.
A better solution may be to use the aspect ratio of the user screen resolution to compute the height.
*Mixed preference"*
If we use the same fields and preference page for the 2 commands, it may be confusing for the user.
Especially if we use a "Pixels Height" preference that should not be used by "Export view". The purpose of the "Pixels width" value when using this command is only to scale the entire image but not to change its aspect ration.