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Win32: If the main or text window is off-screen make it visible... 

...by 1/40th of the scrreen width so that the user can notice it.

This can happen if the window was on a second monitor, which is
disconnected, or if the user knows about `Alt-Space | Move` and then
moving the window with the arrow keys.

Before this, if for example the left edge was off-screen it was moved
to 1920, which is just off-screen, so the window remained invisible.

Fixes: #938
pull/944/head
ruevs 2021-02-17 16:21:22 +02:00 committed by phkahler
parent 04e872a61f
commit 47c3209b48
1 changed files with 19 additions and 5 deletions
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24
src/platform/guiwin.cpp
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@ -142,7 +142,18 @@ static std::string NegateMnemonics(const std::string &label) {
return newLabel;
}
static int Clamp(int x, int a, int b) {
static int Clamp(int x, int a, int b, int brda, int brdb) {
// If we are outside of an edge of the monitor
// and a "border" is requested "move in" from that edge
// by "b/brdX" (the "b" parameter is the resolution)
if((x <= a) && (brda)) {
a += b / brda; // yes "b/brda" since b is the size
}
if(((x >= b) && brdb)) {
b -= b / brdb;
}
return max(a, min(x, b));
}
@ -1218,11 +1229,14 @@ public:
sscheck(GetMonitorInfo(MonitorFromRect(&rc, MONITOR_DEFAULTTONEAREST), &mi));
// If it somehow ended up off-screen, then put it back.
// and make it visible by at least this portion of the scrren
const LONG movein = 40;
RECT mrc = mi.rcMonitor;
rc.left = Clamp(rc.left, mrc.left, mrc.right);
rc.right = Clamp(rc.right, mrc.left, mrc.right);
rc.top = Clamp(rc.top, mrc.top, mrc.bottom);
rc.bottom = Clamp(rc.bottom, mrc.top, mrc.bottom);
rc.left = Clamp(rc.left, mrc.left, mrc.right, 0, movein);
rc.right = Clamp(rc.right, mrc.left, mrc.right, movein, 0);
rc.top = Clamp(rc.top, mrc.top, mrc.bottom, 0, movein);
rc.bottom = Clamp(rc.bottom, mrc.top, mrc.bottom, movein, 0);
// And make sure the minimum size is respected. (We can freeze a size smaller
// than minimum size if the DPI changed between runs.)