paweld/lazarus
1
0
Fork 0
mirror of https://gitlab.com/freepascal.org/lazarus/lazarus.git synced 2025-06-01 20:12:36 +02:00
Code Issues Packages Projects Releases Wiki Activity

TAChart: More user-friendly zoom-in by ZoomDragTool with fixed RatioLimit

Browse Source
This commit is contained in:
wp_xyz 2024-12-25 23:41:12 +01:00
parent 6dd342cef1
commit 345460427e
1 changed files with 14 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
components/tachart/tatools.pas
View File

@ -1304,6 +1304,7 @@ var
ScaleX, ScaleY: Double;
AllowProportionalAdjustmentX, AllowProportionalAdjustmentY: Boolean;
begin
// Allow user to adjust the calculated new extent
DoCalculateNewExtent(ANewExtent);
if not AFull then
@ -1511,6 +1512,7 @@ const
(zreDragTopLeft, zreClick, zreDragBottomLeft),
(zreClick, zreClick, zreClick),
(zreDragTopRight, zreClick, zreDragBottomRight));
// Means: "direction relative to mouse-down point"
var
dragDir: TRestoreExtentOn;
begin
@ -1522,6 +1524,18 @@ begin
with FSelectionRect do
dragDir := DRAG_DIR[Sign(Right - Left), Sign(Bottom - Top)];
// More user-friendly drag direction for zoom-in in case of fixed RatioLimit
case RatioLimit of
zrlNone, zrlProportional: ;
zrlFixedX:
// drag down (not necessarily right)
if dragDir = zreDragBottomLeft then dragdir := zreDragBottomRight;
zrlFixedY:
// drag right (not necessarily down)
if dragDir = zreDragTopRight then dragdir := zreDragBottomRight;
end;
if
(dragDir in RestoreExtentOn) or
(zreDifferentDrag in RestoreExtentOn) and